First slide

Work Energy Theorem

Question

The velocity time graph of a 2kg body is shown. Then the wrong statement is

Easy

A

Work done on the object in 30 sec is zero.
B

Average acceleration of the object is zero.
C

Average velocity of the object is zero.
D

The average force on the object is zero.

Solution

Work done is zero as there is no change in K.E average velocity is displacement/ time. Area of the v-t graph is displacement. As area is not equal to zero, average velocity is not zero.

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