Question

The power needed to lift a mass of 5000 g to height of 1m in 2 second is?

Answer 1

HERE IS YOUR ANSWER

the power needed to lift is equal to the work done / time taken

the work done = the gain in potential energy = mgh = 5 × 10 × 1 = 50J

the power needed = work done / time = 50/2 = 25 W

HOPE MY ANSWER IS CORRECT

Answer 2

The power needed to lift the mass is 25 watts.

Given,

Mass of the object = 5000 gm = 5 kg

Height up to which the mass is to be lifted = 1 m

Time taken = 2 sec

To Find,

The power needed to lift the mass.

Solution,

The formula for calculating power is

Power = work done/time

Now,

Work done = m*g*h

Work done = 5*10*1 = 50 joules.

Now,

Power = 50/2 = 25 watts.

Hence, the power needed to lift the mass is 25 watts.

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