4. Vector A is 7.00 units in length and points along the positive x-axis. Vector B is 5.00 units in length and points along the negative x-axis. find the magnitude and direction of A+2B 1 point

Answers

Answer 1

Answer:

Since the two vectors form a right angle, no components need to be found for the resultant vector - we already have them!

Vector R's x-component = 3.00 units

Vector R's y-component = 4.00 units

To solve for the magnitude of the displacement, use the distance formula: Square Root of [(3)^2 + (4)^2], which equals 5 units.

To solve for the direction of the displacement, plug in -4 (remember where it was pointing) for y and 3 for x. Tan-1(-4/3) = -53.13°, or 53.13° south of east.Please Mark as Brilliant

Answer 2

The magnitude of vector C is |C| = 3 and It is directed along the negative x - axis.

What is vector quantity?

A vector quantity is a quantity with both magnitude and direction.

Given is vector A is 7.00 units in length and points along the positive x-axis. and vector B is 5.00 units in length and points along the negative x-axis.

Vector A = 7 a[x]

Vector B = - 5 a[x]

Therefore, the given expression to be evaluated is -

C = A + 2B

C = 7 a[x] + 2(- 5 a[x])

C = 7 a[x] - 10 a[x]

C = - 3 a[x]

So, the magnitude of vector C is -

|C| = 3

It is directed along the negative x - axis.

Therefore, the magnitude of vector C is |C| = 3 and It is directed along the negative x - axis.

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Related Questions

A 40kg box sits on a shelf 0.5m above the floor. An employee moves the box to a height of 1.8m above the floor. How much work did the employee do in moving the box? A)20J B)72J C)200J D)520J E)720J

Answers

Answer:

b)72

Explanation

work done= force* distance

work done=40*1.8

72J

Is density independent of sample size?

Answers

Answer:

➢ Length, Width, Height, Volume, Mass. ➢ A size independent property is a physical property that does not change when the size of an object changes.

Examples:

➢ Examples of size independent properties: ➢ Density, Color, State of Matter.

Hope this helps :)

what cells secrete myelin for neurons?

a. schwann cells

b. other neurons

c. osteocytes

d. leukocytes

Answers

Answer:

A. Schwann cells

Explanation:

A weight lifter raises a mass of 50kg through a height of 2m. He does this 25 times in one minute. Find his
average power.

Answers

Answer:

[tex]average power = 416.67 \: W

[/tex]

Explanation:

[tex]are \: you \: sure \: this \: is \: a \: man \: or \: robot?......haha. \\ the \: average \: power \: is \: given \: by : \\ p_{(a.v)} = \frac{w}{t} \: but \: work \: or \: energy \: expanded \: is \: given \: by : \\ w = \: fs = mgs \: \: therfore, \: p_{(a.v)} = \frac{mgs}{t} \\ note \: the \: followng : \\ p_{(a.v)} = average \: power, \\ w = work \: done \: or \: energy \: expanded, \\ f = force \: due \: to \: gravity \: = weight = mg, \\ s = distance = height = 2m \times 25 \: lifts, \: m = mass = 50kg, \\ \: g \: = \: acceleration \: due \: to \: gavity = 10 {m(s)}^{ - 2} and \: t = time = 60s.

\\ so \: what \: now, ok \: lets \: find \: p_{(a.v)} . \\ p_{(a.v)} = \frac{mgs}{t}= \frac{50 \times 10 \times 50}{60} = 416.66666667 \: watts.[/tex]

A falcon is diving at a speed of 30m/s. It accelerates at a rate of 40m/sand reaches a speed of
100m/s. Calculate the distance it travels during its acceleration.​

Answers

Answer:

Reasd through the explanartion first :)

Explanation:

Initial velocity, u = 30 m/s

Final velocity, v = 100 m/s

Acceleration, a = 40 m/s²

Distance traveled, s = ?

According to the 3rd equation of motion,

We know that,

v² - u² = 2as

So, putting all the values, we get

⇒ v² - u² = 2as

⇒ (100)² - (30)² = 2 × 40 × s

⇒ 10000 - 900 = 80s

⇒ 9100 = 80s

⇒ 9100/80 = s

⇒ s = 113.75 m.

One Newton equals .225

Answers

The answer to your question is 10.24

all known frequencies of the visible spectrum are..

a. solar light
b. light
c. black light

Answers

Explanation:

[tex]b. \: light[/tex]

A gust of wind blows an apple from a tree. As the apple falls, the force of gravity on the apple is 9.11 N downward, and the force of the wind on the apple is 1.18 N to the right. What is the magnitude of the net external force on the apple? Answer in units of N. Part 2: What is the direction of the net external force on the apple (measured from the downward vertical, so that the angle to the right of downward is positive)? Answer in units of ◦

Answers

Answer:

The net external force on the apple is 9.18 N and the direction of net force is 82.6°.

Explanation:

Given that,

Force of gravity = 9.11 N

Force of wind = 1.18 N

We need to calculate the net external force on the apple

Using formula of net force

[tex]F'=\sqrt{(9.11)^2+(1.18)^2+2\times1.18\times9.11\cos90}[/tex]

[tex]F'=9.18\ N[/tex]

We need to calculate the direction of net force

Using formula of direction

[tex]\theta=\tan^{-1}(\dfrac{9.11}{1.18})[/tex]

[tex]\theta=82.6^{\circ}[/tex]

Hence, The net external force on the apple is 9.18 N and the direction of net force is 82.6°.

The magnitude of the net external force on the apple is 9.19 N and the direction of the net external force is 82.6⁰.

The given parameters;

weight of the apple, W = 9.11 Nhorizontal force on the apple, F = 1.18 N

The magnitude of the net external force on the apple is calculated as follows;

[tex]F= \sqrt{F_y^2 + F_x^2} \\\\F= \sqrt{9.11^2 + 1.18^2} \\\\F = 9.19 \ N[/tex]

The direction of the net external force on the apple is calculated as follows;

[tex]\theta = tan^{-1}(\frac{F_y}{F_x} )\\\\\theta = tan^{-1}(\frac{9.11}{1.18} )\\\\\theta = 82.6 \ ^0[/tex]

Thus, the magnitude of the net external force on the apple is 9.19 N and the direction of the net external force is 82.6⁰.

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Two technicians are discussing the FMVSS 135 standards for parking brakes. Technician A states that the hand force required to set the brake should not exceed 80 lb. Technician B states that the foot force to set the brake should not exceed 80 lb. Which technician is correct?

Answers

Answer:

Technician A

Explanation:

Technician A is correct because, the hand force required is not supposed and even should not exceed 80 lb.

On the other hand, the foot force limit is even higher at 100 lb. Thus, the required foot force break should not exceed 100 lb. We are given 80 lb in the question, which is quite less than 100 lb. It could exceed 80, but must not exceed 100. Thus only Technician A is correct among them both.

6. Which statement best describe the relationship between temperature and thermal energy?
(1 Point)
Temperature is inversely related to thermal energy
Temperature is directly proportional to thermal energy
As temperature foes up, thermal energy goes down
Thermal energy is not related to energy

Answers

Answer:

Temperature is directly proportional to thermal energy.

What is the wave velocity if the wave length is 100 cm and the frequency is 2 Hz?​

Answers

Answer:

velocity = 2m/s

using v=fΠ

convert 100 CM to m

Answer:

200 cm per second

Explanation:

The equation for wave velocity=wavelength x frequency, since the wavelength is 100 and the frequency is two, the equation would be 100 x 2, which equals 200. Therefore, the correct answer is 200 cm per second.

Question 2
When an object exerts a force on another object, the second force is
о O
AB
paired
B
oppoosite in direction
с
equal
D
all other answers

Answers

the answer is EQUAL because a force on another object the second force is equal

Why does the crane need a counterbalance?

Answers

Answer:

To make the  lifting more efficient. It lets there be less taxing and saves a ton of energy!!

Explanation:

a blwoing ball traveling 2.0 m/s has a 16 J of Kinetic energy what is the mass of the bowling ball in KG

Answers

Answer:

ke=1/2mv2

Explanation:

16=m(2)*2

16=m4

m=16÷4

m=4

A driver in a 500 kg car going 20 m/s sees a large box in the middle of the road 100 meters away. How much net force is required to get the car to stop without hitting the box?
50 POINTS AND WILL GIVE BRAINLY! THIS IS URGENT

Answers

Answer:

100

Explanation:

my apologies if I am wrong

1.Which of the following are examples of projectile motion
a. a airplane taking off
b.a tennis ball lobbed over a net
c. a plastic disk sailing across a lawn
d.a hawk diving to catch a mouse
e. a parachutist drifting to Earth
f. a frog jumping from land into the water​

Answers

Answer:

b and f

Explanation:

Following are examples of projectile motion: a. A tennis ball lobbed over a net c. A plastic disk sailing across a lawn d. A hawk diving to catch a mouse e. A parachutist drifting to Earth. The correct options are A, C, D and E.

Projectile motion refers to the motion of an object that is launched into the air and moves along a curved trajectory under the influence of gravity alone, with no other forces acting horizontally. In projectile motion, the object follows a path called a parabola.

In the given options, a tennis ball being lobbed over a net, a plastic disk sailing across a lawn, a hawk diving to catch a mouse, and a parachutist drifting to Earth all demonstrate projectile motion. In each case, the objects are initially launched or propelled into the air and subsequently follow a curved path influenced primarily by gravity. The trajectory of these objects can be described by a parabolic shape, which is a characteristic of projectile motion.

The correct options are A, C, D and E.

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HELP PLEASE AND HURRRRRY
How far a projectile moved horizontally from its starting point is its...
A. trajectory
B. Elipse
C. Range
D. Projectile

Answers

Answer:

the path the object follows is called its trajectory so A. trajectory


Mark is pushing a box down the hall. Mark is using 5N to push the box 20m. How much work is Mark doing?

Answers

Answer:

The answer is 100 J

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question

force = 5N

distance = 20m

We have

workdone = 5 × 20

We have the final answer as

100 J

Hope this helps you

help ASAPPPPPPPPPPPPP pls

Answers

The correct answer is a I did this

Answer:

The answer for this question is

D


A 52-kg bike is moving along a smooth road at a constant velocity of 8.4 m/s. What is the net force acting on the bike

Answers

Answer:

0 N

Explanation:

Net force = mass × acceleration

∑F = ma

The velocity is constant, so the acceleration is 0.  Therefore, the net force is 0.

The net force acting on the bike is 0 N.

What is net force?

Net force is the sum of all forces acting on an object. The net force can be calculated using Newton's second law, which states that F = ma, where: F is the net force. m is the mass of the object. a is acceleration.

The velocity is constant, so the acceleration is 0.  Therefore, the net force is 0 N.

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What happens to the lost mass during nuclear reactions in a star's core?
O It is destroyed
O It becomes dark matter
O It is ejected into space
O It is converted to energy

Answers

to mass loss, then, stars with starting masses up to at least 8 MSun (and perhaps even more) probably end their lives as white dwarfs. But we know stars can have masses as large as 150 (or more) MSun. They have a different kind of death in store for them. As we will see, these stars die with a bang.

parts of MECHANICAL WAVES

help please UwU

Answers

Answer:

waves

Explanation:

ocean

Please help me out with this one???

Answers

Answer:

take another pic i cant see it

Explanation:

In Newton’s second law, if the net force acting on object doubles. The object’s Will also double

Answers

Answer: Explanation:

If the net force on an object is doubled, its acceleration will double If the mass of an object is doubled, the acceleration will be halved .

In Newton’s second law, if the net force acting on object doubles then either acceleration is double or mass is double.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

According to Newtons second law force is product of mass and acceleration.

F = ma

In Newton’s second law, if the net force acting on object doubles then either acceleration is double or mass is double.

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If the radius of atom is 4 × 10^-3 nm (Nano meter), so its diameter is: *

8 × 10^-12 m
8 × 10^-3 µm
8 × 10^-6 km
8 × 10^-9 cm ​

Answers

Answer:

8 x 10^-12

Explanation:

Radius = 4 x 10^-3nm = 4 x 10^-12 m

by the formula,

                        diameter = 2 x radius

                        diameter = 2 x (4 x 10^-12)

                        diameter = 8 x 10^-12 m

                       

Study the motion map shown. Some of the vectors have been circled. A long black arrow pointing right labeled x. Above that are 5 green arrows of the same length pointing right, positioned end to end. Next to these are 2 shorter green arrows, each with small yellow arrows pointing left just above that are circled. Farther up from the line is a point. Much farther above that are 3 green arrows each longer than the previous. Above the green arrows are 3 yellow arrows of equal length pointed left, each circled. What do the circled vectors represent? distance speed velocity acceleration

Answers

Answer:

The object starts away from the origin and then moves toward the origin at a constant velocity. Next, it stops for one second. Finally, it moves away from the origin at a greater constant velocity.

Explanation:

Sample Response: The object starts away from the origin and then moves toward the origin at a constant velocity. Next, it stops for one second. Finally, it moves away from the origin at a greater constant velocity.

What did you include in your description? Check all that apply.

The object starts away from the origin.

The object moves toward the origin at a constant velocity.

The object stops for one second.

The object moves away from the origin at a greater constant velocity.

The circled vectors represent speed.

What is speed?

The is the ratio of distance traveled to time of motion. Speed is a scalar quantity because it has only only magnitude.

From the map, as the magnitude (size) of the green arrows changes, the size of the circled arrows changes accordingly.

Also, the direction of the circled arrow was constant for both top and bottom arrows.

Velocity changes with direction BUT speed does not change with direction, and has a complete meaning with only magnitude.

Thus, the circled vectors represent speed.

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A school bus moves slower and slower. Using what you have learned about forces, explain why the bus moves slower and slower.

Answers

Explanation:

the weight of the people inside the bus

can someone help me answer this? i dont get it and I need help before the next 30 minutes. ill give a brainiest to whoever helps me tyyy :)

Answers

Answer:

S=5.83...

Explanation:

s=d/t

Speed=distance/time

s=35/10

s=5.83...

Which unit you would use to measure the following objects? This is so confusing

Answers

Answer:

weight of truck in kg, height of person in meter m, amount of water in kiloliter kl, length of eyelash in mm

List three applications of pressure in our daily lives.​

Answers

Answer:

1) Skis have a large area to reduce the pressure on the snow. This ensures that the skis do not sink into the snow too far.

2) The pressure under the studs on the soles of football shoes is high enough for them to sink into the ground, which gives extra grip.

3) A vacuum cleaner has a fan inside that creates a low pressure inside the device. Consequently, air and dirt particles are sucked into the device.

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