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Arada [10]
3 years ago
6

Ben and Jerry, arch rivals, decide to have a weight lifting contest during PE. Ready, set, go! Ben and Jerry both lift a 250 kg

barbell 10 times over their heads. They are approximately the same height and lift the barbell the same distance in the air. It takes Ben 5 seconds to complete 10 lifts; it takes Jerry 25 seconds to complete his 10 lifts. Which statement is MOST accurate regarding the weightlifting contest? A) Ben did more work than Jerry. B) Ben has more power than Jerry. C) Ben and Jerry have the same power. D) Ben does more work and is more powerful than Jerry.
Physics
2 answers:
Sidana [21]3 years ago
7 0

The answer is B. Your welcome.

B    ) STILL CHILL

cluponka [151]3 years ago
7 0

Answer:

B) Ben has more power than Jerry.

Explanation:

Here work done to lift the mass to the certain height is given as

W = mgh

now given that Ben and Jerry both lift the mass to the same height 10 times

so here work done by Ben and Jerry must be same.

now we know that power is defined as rate of work done

P = \frac{W}{t}

now we know from above formula that it took less time by Ben as he lift the mass 10 times in 5 seconds while Jerry took 25 seconds to lift the mass 10 times.

So here power by Ben will be more than Jerry as is took lesser time to complete the task of 10 times lift of mass

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Answer:

d. This statement is false. She and the Space Station share the same orbit and will stay together unless they are pushed apart.

Explanation:

In astronomy, orbit is simply a path of an object around another object in a space. That is, orbit is a path of a body that revolves around a gravitating center of mass. Examples of an orbit is are satellite around a planet, orbit around a center of galaxy, planet around the sun, and among others.

On the other hand, space station refers to a spacecraft that can support a group of human for long time in the orbit. Another names for space stations are orbital space station and orbital station.

Therefore, an astronaut goes on a space walk outside the Space Station shares the same orbit with the space station and they will stay together unless they are pushed apart.

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3 years ago
It is observed that the time for the ball to strike the ground at b is 2.5 s. determine the speed at which the ball was thrown.
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11. A cyclist accelerates from 0 m/s to 10 m/s in 3 seconds. What is his acceleration ? Is this acceleration higher than that of
Marat540 [252]

a =  \frac{v - u}{t}

v = final velocity

u = initial velocity

t = time taken

the acceleration of the cyclist is

\frac{10 - 0}{3}  = 3.333333....

approximately 3.33 m/s^2

the acceleration of the car is

\frac{40 - 0 }{8}  = 5.0

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3 years ago
Which of Newton's laws
Virty [35]

Answer:

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8 0
3 years ago
Read 2 more answers
A circular-motion addict of mass 80 kg rides a Ferris wheel around in a vertical circle of radius 10 m at a constant speed of 6.
bekas [8.4K]

Answer with Explanation:

We are given that

Mass=80 kg

Radius,r=10 m

Speed,v=6.1 m/s

a.Time period,T=\frac{2\pi r}{v}=\frac{2\pi\times 10}{6.1}=10.3 s

b.F_N=mg-\frac{mv^2}{r}

Substitute the values

F_N=80\times 9.8-\frac{80\times(6.1)^2}{10}=486 N

c.F_N=mg+\frac{mv^2}{r}

Substitute the values

F_N=80\times 9.8+\frac{80\times (6.1)^2}{10}=1081.7 N

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3 years ago
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