Question #4888

A cheerleader lifts his 38.6 kg partner straight up off the ground a distance of 0.596 m before releasing her. 2

The acceleration of gravity is 9.8 m/s .

If he does this 28 times, how much work has he done?

The acceleration of gravity is 9.8 m/s .

If he does this 28 times, how much work has he done?

Expert's answer

The work of doing that 1 time is:

A1 = F*h = mgh.

Then the total work

is:

A = 28*A1 = 28mgh = 28*38.6*9.8*0.596 = 6312,74 J.

A1 = F*h = mgh.

Then the total work

is:

A = 28*A1 = 28mgh = 28*38.6*9.8*0.596 = 6312,74 J.

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