1(i)
For a body to be in dynamic equilibrium, its:
- (a)momentum should be zero
- (b)acceleration should be zero
- (c)kinetic energy should be zero
- (d)velocity should be zero
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acceleration should be zero
Reason — A body is said to be in dynamic equilibrium when it is moving with uniform velocity. It means that the body is not at rest, its velocity is constant and hence its acceleration is zero.
Therefore, for dynamic equilibrium, acceleration should be zero.