Using 1000 J of work,a toy elevator is raised from the ground floor to the second floor in 20 seconds.The power needed to do this job was
A)20 W.
B)50 W.
C)100 W.
D)1000 W.
E)20,000 W.

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The Answer of Using 1000 J of work,a toy elevator is raised from the ground floor to the second floor in 20 seconds.The power needed to do this job was
A)20 W.
B)50 W.
C)100 W.
D)1000 W.
E)20,000 W.

Using 1000 J of Work,a Toy Elevator Is Raised from the Ground