A 0.311 kg tennis racket moving 30.3 m/s east makes an elastic collision with a 0.0570 kg ball moving 19.2 m/s east. Find the velocity of the tennis racket after the collision.
Answers
Step-by-step explanation:
An elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies remains the same.
let the following:
m₁ = mass of tennis racket = 0.311 kg
m₂ = mass of the ball = 0.057 kg
u₁ = velocity of tennis racket before collision = 30.3 m/s
u₂ = velocity of the ball before collision = -19.2 m/s
v₁ = velocity of tennis racket after collision
v₂ = velocity of the ball after collision
Right (+) , Left (-)
v₁ = [ u₁ * (m₁ - m₂) + u₂ * 2m₂ ]/ (m₁ + m₂)
= ( 30.3 * (0.311 - 0.057) - 19.2 * 2 * 0.057 ) / ( 0.311 + 0.057)
= 14.966 m/s.
So, the velocity of the tennis racket after the collision 14.966 m/s.
Related Questions
HELP ME I WILL GIVE BRAINLYEST!!
Which of the following methods of soil conservation uses the roots of plants as anchors in the soil? (5points)
Group of answer choices
Adding fertilizers to soil
Planting trees on sloped surfaces
Adding beneficial organisms to soil
Watering grasses to add moisture
Answers
Answer:
Planting of trees on sloped surfaces is a method of conservation that utilizes the roots of plants. Planting trees on such areas would prevent hazards and maintain the soil formation future since the roots would hold the soil together preventing or minimizing any soil erosion.
Answer:
Planting of trees on sloped surfaces is a method of conservation that utilizes the roots of plants. Planting trees on such areas would prevent hazards and maintain the soil formation future since the roots would hold the soil together preventing or minimizing any soil erosion.
match the quote about working in government to the correct branch. Then name
the article that describes the powers of this branch.(Giving Brainlist and doubling points for Correct answer!)
Answers
Matching the quote about working in government to the correct branch will give us:
The second bubble describes the power of the executive branch
The third bubble describes the power of the judicial branch
The first bubble describes the power of the legislative branch
What is the executive branch?The power of the Executive Branch is vested in the President of the United States, who also acts as head of state and Commander-in-Chief of the armed forces.
The executive branch or is the part of government that enforces law, and has responsibility for the governance of a state.
In political systems based on the principle of separation of powers, authority is distributed among several branches (executive, legislative, judicial)—an attempt to prevent the concentration of power in the hands of a single group of people.
The executive enforces the law as written by the legislature and interpreted by the judiciary.
The executive can be the source of certain types of law, such as a decree or executive order. Executive bureaucracies are commonly the source of regulations.
What is the judicial branch?The third branch of government is the Judicial branch. The Judiciary is made up of courts -- Supreme, Circuit, the magistrate (local) and municipal (city) courts. The Judicial branch interprets the laws.
The state judges are elected by the citizens rather than being appointed. They also run for their office as members of a political party.
The judiciary is the system of courts that interprets, defends, and applies the law in the name of the state. The judiciary can also be thought of as the mechanism for the resolution of disputes.
In many jurisdictions, the judicial branch has the power to change laws through the process of judicial review.
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the farther you live from an ocean, the more likely you will have...
A ) Little to no temperature change from summer to winter.
B ) A tropical climate
C ) Extreme temperature differences in summer and winter
D ) An Arctic climate
Answers
Explanation:
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The farther you live from an ocean, the more likely you will have a continental climate where there are extreme temperature differences in summer and winter
What is continental climate?Inland regions have continental climates. To feel the impacts of ocean water, they are too distant from oceans. Between 40 and 70 degrees north latitude, continental climates are typical.
Northern Ukraine, eastern Belarus, Russia, the majority of Finland, and northern Sweden all have climates that are classified as continental. The northeast has the coldest winters and warmest summers, with winters being significantly colder, longer, and covered in more snow than in western Europe.
Given data ,
Let the land be situated at a place where it is farther away from the ocean
Now , there will be extreme temperature differences during the summer and the winter time
And , winters may be quite cold and summers can be very hot in continental climes. As there is less water in the continental environment than there is in marine climates, the temperatures are not as warm.
Hence , the continental climate takes place the farther you live from an ocean
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What is the difference between science and pseudoscience?
A. Pseudoscience is based on observation, while science is based on experimentation.
B. Pseudoscience conclusions are based on empirical evidence, while scientific conclusions are not.
C. Science is based on observation, while pseudoscience is based on experimentation.
D. Scientific conclusions are based on empirical evidence, while pseudoscientific conclusions are not.
Answers
Answer:
b?
Explanation:
Two foam peanuts become equally charged as they fall out of a cardboard box. Each foam peanut carries a charge of 8 x 10^-4 C. If the peanuts are 0.05 m apart, what is the electric force between them? Assume that k = 9 x 10^9 Nm^2/C^2. Use Coulomb’s law equation: F = kq1q2/r^2.
A. 115,200 N
B. 2,304,000 N
C. 0.000000434 N
D. 0.0000086 N
Answers
Answer:
Answer labeled B : 2,304,000 N
Explanation:
Recall the formula for the electric force:
[tex]F_e=9\,\,10^9\, \, \frac{q_1*q_2}{d^2} \\F_e=9\,\,10^9\, \, \frac{8\,10^{-4}*8\,10^{-4}}{0.05^2} \\F_e=2,304,000\,\,N[/tex]
which agrees with answer B provided.
What is the equation that links work done, force and distance?
Answers
Write two reasons for using mercury in a thermometer ️️
Answers
Answer:
my first reason is that Mercury is the only one in liquid state at room temperature and thermometers because it has high coefficient of expansion . my second reason is that mercury its can changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale, and also Mercury thermometers can be used to determine body, liquid, and vapor temperature.
Heat capacity is an intrinsic physical property of a substance that measures the amount of heat required to change that substance's
temperature by a given amount. The specific heat is the amount of heat necessary to change the temperature of 1.00 kg of mass by
1.00°C. Its Sl unit is //(kg-K) or J/(kg C).
Insulation is an important part of the building process; we insulate our homes, schools and businesses to conserve energy. Insulation
helps to help us cool p the summer and warm in the winter. Students were asked to design an insulating box, one that would keep
ice cubes from melting using any of the materials listed above. Which material would you pick? Explain why. Choose ALL the answers
that would apply.
A)
Cork
B)
Copper
It is a solid
D)
It has the lowest specific heat capacity of any solid.
It has the highest specific heat capacity of any solid.
Answers
Answer: It’s Cork , It is a Solid , It has the highest specific heat capacity of any solid
So. A,C,E!!!
Explanation:
Answer: I agree with the other person. The answer is Cork.
Explanation: The answer is Cork because:
It's a solidHas the highest specific heat capacity of any solid⊂ヽ
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Answers
Love:
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Life:
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Dream:
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A puppy weighing 3 kilograms races through the dog park. If she slows from a speed of 2 meters/second to 1 meter/second, what will happen to her kinetic energy? Use the kinetic energy equation.[tex]KE=\frac{1}{2} mv^{2}[/tex]
A.
Her kinetic energy decreases to 1.5 J.
B.
Her kinetic energy increases to 1.5 J.
C.
Her kinetic energy remains unchanged.
D.
Her kinetic energy decreases to 1 J.
Answers
Answer: B Hope I helped ^^
Explanation:
if volume is constant and heat is added, what happens to the
temperature and pressure?
- increases
- decreases
- stays the same
Answers
Answer:
the temperature would Increase and pressure would increase
Explanation:
This would occur because the temperature would move to the liquid through conduction and the pressure would increase because the heat would cause more and more pressure
Air pressure decreases as elevation increases. Describe how the boiling point of
water on top of a mountain would be different from its boiling point at sea level.
Answers
Answer:
boiling point is directly proportional to air pressure. as the air pressure decreases due to increase in elevation, boiling point of the water on top of a mountain would be less than the boiling of water at sea level
Explanation:
The center of Mars is called the mantle true or false
Answers
Answer:
Central core
Explanation:
If a spring is stretched to twice the lengtj of its equilibrium position, by what factor does the energy stored in the spring change?
Answers
Answer:
the energy increases 4 times
Explanation:
A spring has an elastic potential energy that is given by the expression
K_e = ½ K (x-x₀)²
where x is the distance from the equilibrium point and k is the return constant
if the spring is stretched at x-x₀ = 2x₀, the energy value
K_e = ½ k (2x₀)²
K_e = ½ k 4 x₀²
K_e = 4 (½ k x₀²)
[tex]\frac{K_e}{ \frac{1}{2} k x_o^2}[/tex] = 4
therefore the energy increases 4 times
The energy stored in the spring changes by a factor of 4
The formula for calculating the energy stored in the spring is expressed as:
[tex]E=\frac{1}{2}ke^2[/tex]
If the spring is stretched to twice the length of its equilibrium position
[tex]E_2=\frac{1}{2}(2k)^2\\E_2=\frac{1}{2}4k^2[/tex]
Take the ratio of the energy stored in the spring
[tex]\frac{E_2}{E} =\frac{1/2(4kx^2)}{1/2kx^2}\\ \frac{E_2}{E} =\frac{4}{1}\\E_2 = 4E[/tex]
This shows that the energy stored in the spring changes by a factor of 4
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Two balls marked with question marks, right and left. The left ball has arrows emerging in all directions but to the right and all arrows either point to the left or immediately bend toward the left after emerging. The right ball has arrows emanating in all directions but to the left and all arrows either point to the right or immediately bend toward the right.
Use the drop-down menu to complete the statement.
Based on the field lines, the electric charges indicated by the question marks are?
a) the same
b) the opposite
Answers
Answer:
B
Explanation:
Answer: A: the same
Explanation: Based on the field lines, the electric charges indicated by the question marks are the same. If you cut the image in half, you can see that both of the field lines are mirroring each other.
Which two criteria are least important for engineers to consider when developing a process to produce sulfur trioxide? A. The process should produce a high output of products.
B. The process should provide outputs for multiple needs.
C. The process should already be well established.
D. The process should be environmentally friendly.
Answers
Answer:
c and b
Explanation:
Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. True or False
Answers
Answer:
True.
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body.
Mathematically, it is given by the formula;
Mechanical energy = G.P.E + K.E
Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. This is ultimately in accordance with the law of conservation of energy, which states that energy cannot be destroyed but can only be converted or transformed from one form to another.
Hence, Mechanical energy that has been ‘lost' to friction isn't really lost but converted into heat energy.
Are all sound frequencies audible to the human ear? Why or Why not?
Answers
Answer:
thank you
Explanation:
If the roller coaster car in the above problem were moving at twice the speed, then what would be its new kinetic energy
Answers
Answer:
it would move faster
Explanation:
If the roller coaster car in the above problem were moving at twice the speed, then 16000 Joules is the new kinetic energy.
What is kinetic energy?Kinetic energy is a type of power that a moving object or particle possesses. An item accumulates kinetic energy when work, which involves the transfer of energy, being done on it by exerting a net force.
A object in motion or particle has kinetic energy, which relies on both its mass and its rate of motion. Any combination of movements, including translation, rotation along an axis, and vibration, may constitute the kind of motion.
kinetic energy= ½mv²
v =4m/s
m= 2000kg
KE = ½ (2000) (4)²
=16000 Joules
Therefore, If the roller coaster car in the above problem were moving at twice the speed, then 16000 Joules is the new kinetic energy.
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what will happen when two wave pulses that are the same size approach one another from opposite directions?
Answers
Two charges are located on the positive X-axis of a
coordinate system. If and are 5cm
and 7cm from the origin (X=0). What is the force
exerted by & on a third charge ; if
A. is placed at 3cm from the origin?
B. is placed at 6cm from the origin?
C. is placed at 9cm from the origin?
Answers
Answer:
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Explanation:
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Answer:
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Explanation:
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charging occurs when you run into and moving player true or false
Answers
Answer:
False
Explanation:
Because as soon as you hit the person, all of your "charge" you've created gets destroyed by forcing you to hit another object, and therefore cannot be charged.
Which location on the map above is a source of North Atlantic deep water?
A
B
C
D
Answers
what is the instrument used to measure radiation
Answers
What is the kinetic energy of a ball at rest with a mass of 10 Kg?
а 100j
b 0j
c 10j
d 1000j
Answers
Answer:
B 0j
Explanation:
It is at rest, not moving
1. The force due to gravity acting on an object is called what?
Answers
Answer:
Near the surface of the earth such objects are accelerating. This acceleration is due to the gravitational force acting between the objects and the earth. ... It points straight downward towards the center of the earth. The force of gravity acting on an object is called its weight.
what is the role of neutrons in the nucleus.
Answers
Answer:
To be neutral
Explanation:
Neutrons are electrically neutral but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Answer: The role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Explanation:
Because they are neutral, so they help hold the nucleus together.
Which of the following is a subatomic particle?
Particle
Atom
Neutron
Element
Answers
Answer:
neutron.
Explanation:
subatomic particles include,
neutron.
proton.
electron.
hope it helps. :)
What can affect the acceleration of objects? (multiple choice)
a. the objects have the same force acting on them
b. none of the above
c. the objects have the same force and mass acting on them
d. the objects have the same shape but different masses.
Answers
Explanation: the acceleration of an object increases with increased force and decreases with increased mass
Which chemical equation obeys the Law of Conservation of Mass?
A. 2NO2 → O2 + N2
B. 2NO2 → O2 + 2N2
C. 2NO2 → 2O2 + N2
D. NO2 → O2 + N2
Answers
Answer:
c according to me the correct answer is C