The weightlifter can exert a power of 1000 watts, for the given work done and time.
The quantity of energy moved or converted per unit of time is known as power. The watt, or one joule per second, is the unit of power in the International System of Units. Power is a scalar quantity.
Only when a particular distance is traversed or when force is applied is work performed. No work is done if the force given to the object does not cause it to move.
Calculations:
Power (P) = work done/time taken
Work done = 2000N * 2m = 4000Nm
Time taken = 4 seconds
P= 4000Nm/4sec = 1000watts
So, the person can exert a power of 1000 watts.
Hence, the weightlifter can exert a power of 1000 watts, for the given work done and time.
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