A person lifts a load of 60kg ustag a wheel and axle
Of VR 3. If the diameter of the axle is 5 cm, find the
radius of the wheel, MA and effort applied . Also find
its efficiency​

Answer:

Kinetic energy

Explanation:

Answer:

Kinetic energy=1/2 mv^2.

which is 1,000,000,000=1/2×90,000×v^2.

1000000000=45,000v^2.

v^2=222.22.

v=√222.22.

v=14.9~15m/s.

The speed of a 90,000 kg airplane with a kinetic energy of one billion Joules would be 149.07 m/s

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.

Total mechanical energy is s the sum of all the kinetic as well as potential energy stored in the system.

ME = KE + PE

As given in the problem we have to calculate the speed of an airplane with a mass of 90,000 kg and kinetic energy of one billion Joules.

m= 90000 kg

K.E = 1 billion Joules

     = 1,000,000,000 Joules

The total kinetic energy

KE = 1/2mv²

By substituting the respective values in the formula of kinetic energy

1,000,000,000 J = 1/2×90000 ×v²

v² = 1,000,000,000 ×2/90000

v² = 22222.222

v =149.07 m/s

Thus, the speed of a 90,000 kg airplane with a kinetic energy of one billion Joules would be 149.07 m/s

Learn more about mechanical energy from here

brainly.com/question/12319302

#SPJ5

Answer: Gravity

Explanation: Gravity is pulling down on the ball, making it stay on the floor

Answer:

true

Explanation:

i just took the test

Answer:

TRUE!!!!!

Explanation:

TRUE!!!!!

TRU!!!!!!

TR!!!!!!

T!!!!!!

Answer:

B

Explanation:

KE=0.5mv^2

The speed is inversely proportional to the square root of mass

Answer:

800 +2 is 802 is decilitre

o.802 is in l

Answer:

where is the question?

Answer:

Scientific models have two basic types. FALSE.

Hoped I helped

Answer:

Explanation:

To get the magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle, we will have to resolve the force perpendicular to the wrench. Torque is the turning effect of a body or force about a point. It is similar to moments.

Torque = Force * radius

Note that the force must be perpendicular to the wrench. On resolving the force perpendicularly to the wrench, we will have to resolve the force to the vertical.

Fy = Fsinθ

Fy = 10sin30°

Fy = 10 * 0.5

Fy = 5N

Torque = Fy * r

Given Fy = 5N and r = 20cm = 0.2m

Torque = 5 * 0.2

Torque = 1Nm

Hence the magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle is 5N

Answer:

The above has the correct statement

Explanation:

The coyotes have the same energy of motion, even if they are running at different speeds.

Answer:

The length of days and nights change with the seasons.

Explanation:

Distance from the equator along with the tilt of Earth's rotational axis contributes to day and night period differences. Daylight hours or the period of sunlight exposure vary due to the inclined axis of the latitudes. In the northern hemisphere during summers, the tilt of the axis is towards the sun which brought more sunlight to the exposed region. And therefore the length of day hours is more than the southern hemisphere which at the same time will be tilted away from the sun.

Answer:

pablo

Explanation:

si pablo come tacos con barbacoa

Answer:

609.6 cm is the answer

Answer: 18.56 m/sec

Explanation:

Average velocity =distance/time=5400/(4.85*60)=18.56 m/sec

Answer: 8.75 km/hr

Explanation:

Concept to know

Average speed: total distance/total time

-------------------------------------------------------

 total distance/total time

=(12.2+19.3)/(1.4+2.2) ⇔ add the numbers of two time running together

=31.5/3.6 ⇔ simplify

=8.75 km/hr

Hope this helps!! :)

Please let me know if you have any question

Answer:

45 degrees

Explanation:

Answer:

Ideally, the work output of a lever should match the work input. However, because of resistance, the output power is nearly always be less than the input power. As a result, the efficiency would go below [tex]100\%[/tex].  

Explanation:

In an ideal lever, the size of the input and output are inversely proportional to the distances between these two forces and the fulcrum. Let [tex]D_\text{in}[/tex] and [tex]D_\text{out}[/tex] denote these two distances, and let [tex]F_\text{in}[/tex] and [tex]F_\text{out}[/tex] denote the input and the output forces. If the lever is indeed idea, then:

[tex]F_\text{in} \cdot D_\text{in} = F_\text{out} \cdot D_\text{out}[/tex].

Rearrange to obtain:

[tex]\displaystyle F_\text{in} = F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}}[/tex]

Class two levers are levers where the perpendicular distance between the fulcrum and the input is greater than that between the fulcrum and the output. For this ideal lever, that means [tex]D_\text{in} > D_\text{out}[/tex], such that [tex]F_\text{in} < F_\text{out}[/tex].

Despite [tex]F_\text{in} < F_\text{out}[/tex], the amount of work required will stay the same. Let [tex]s_\text{out}[/tex] denote the required linear displacement for the output force. At a distance of [tex]D_\text{out}[/tex] from the fulcrum, the angular displacement of the output force would be [tex]\displaystyle \frac{s_\text{out}}{D_\text{out}}[/tex]. Let [tex]s_\text{in}[/tex] denote the corresponding linear displacement required for the input force. Similarly, the angular displacement of the input force would be [tex]\displaystyle \frac{s_\text{in}}{D_\text{in}}[/tex]. Because both the input and the output are on the same lever, their angular displacement should be the same:

[tex]\displaystyle \frac{s_\text{in}}{D_\text{in}} =\frac{s_\text{out}}{D_\text{out}}[/tex].

Rearrange to obtain:

[tex]\displaystyle s_\text{in}=s_\text{out} \cdot \frac{D_\text{in}}{D_\text{out}}[/tex].

While increasing [tex]D_\text{in}[/tex] reduce the size of the input force [tex]F_\text{in}[/tex], doing so would also increase the linear distance of the input force [tex]s_\text{in}[/tex]. In other words, [tex]F_\text{in}[/tex] will have to move across a longer linear distance in order to move [tex]F_\text{out}[/tex] by the same [tex]s_\text{out}[/tex].

The amount of work required depends on both the size of the force and the distance traveled. Let [tex]W_\text{in}[/tex] and [tex]W_\text{out}[/tex] denote the input and output work. For this ideal lever:

[tex]\begin{aligned}W_\text{in} &= F_\text{in} \cdot s_\text{in} \\ &= \left(F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}}\right) \cdot \left(s_\text{out} \cdot \frac{D_\text{in}}{D_\text{out}}\right) \\ &= F_\text{out} \cdot s_\text{out} = W_\text{out}\end{aligned}[/tex].

In other words, the work input of the ideal lever is equal to the work output.

The efficiency of a machine can be measured as the percentage of work input that is converted to useful output. For this ideal lever, that ratio would be [tex]100\%[/tex]- not anything higher than that.

On the other hand, non-ideal levers take in more work than they give out. The reason is that because of resistance, [tex]F_\text{in}[/tex] would be larger than ideal:

[tex]\displaystyle F_\text{in} = F_\text{out} \cdot \frac{D_\text{out}}{D_\text{in}} + F(\text{resistance})[/tex].

As a result, in real (i.e., non-ideal) levers, the work input will exceed the useful work output. The efficiency will go below [tex]100\%[/tex],

Answer:

A vibration is the primary source of a sound.

Answer:

vibration

Explanation:

A sound is the result of a body vibrating in a medium that transmits the energy given off by the body. When a musician draws a bow across the strings of a violin, the strings vibrate and make a sound.

Answer:

8100 g

Explanation:

8.1 kg × 1000

= 8100 g

Answer:

8,100 Grams

Explanation:

To change Kilograms to Grams, you multiply the mass value by 1000.

So, 8.1kg x 1000 = 8,100g.

Hope this helps!

Answer: give up because nothing can be done.

Explanation:

You would have to give up because you have taken on an impossible task. And nothing can be done because there is no known means available to you to measure or observe what is happening outside the spaceship. And as a result this has made it an impossible task knowing the velocity of the ship or finding out.

Answer:

Generally, a solute dissolves faster in a warmer solvent than it does in a cooler solvent because particles have more energy of movement. For example, if you add the same amount of sugar to a cup of hot tea and a cup of iced tea, the sugar will dissolve faster in the hot tea.

Answer:

scientific journal

in my guess

Answer:

scientific journalExplanation:

Answer: 815 L

Explanation:

0.028 kL=28L (times 1000)

843 L-0.0028 kL=843L-28L=815 L

Hope this helps!! :)

Please let me know if you have any question or need any further explanation

Answer:

The speed of the flow of water in the river is 4 m/s.

Explanation:

Given that,

Speed of man = 5 m/s

If this man swims crosses a specific river his speed is 3 m/s.

If he takes the minimum time to cross the river

Let the speed of flow of water be [tex]v_{r}[/tex]

We need to calculate the speed of the flow of water in the river

Using formula for velocity

[tex]v_{rs}^2=v_{r}^2+v_{s}^2[/tex]

[tex]v_{r}^2=v_{rs}^2-v_{s}^2[/tex]

Where, [tex]v_{s}[/tex] = velocity of swimmer

[tex]v_{sr}[/tex] = relative velocity

[tex]v_{r}[/tex] = velocity of river

Put the value into the formula

[tex]v_{r}^2=5^2-3^2}[/tex]

[tex]v_{r}=\sqrt{5^2-3^2}[/tex]

[tex]v_{r}=4\ m/s[/tex]

Hence, The speed of the flow of water in the river is 4 m/s.

Answer:

the action of investigating something or someone; formal or systematic examination or research.

Explanation:

This definition is provided by Oxford Languages

Answer:

#1: 8.92 x 10^6 = 8920000

#2: 3.05 x 10^-3 = 0.00305

Explanation:

Answer:

16

Explanation:

The position of X is 16 because they gap between -4 and 0 is 4.

Answer:9.82 m

Explanation:

As we know from equation of motion

S=v*t +0.5 a t^2

Know s=H/2

a =9.82

t=1

V=0

Plugging the values

H*0.5=0+0.5*9.82*1^2

H=9.82 m