Read each statement below carefully and state with reasons and examples, if it is true or false; A particle in one-dimensional motion

(a) with zero speed at an instant may have non-zero acceleration at that instant

(b) with zero speed may have non-zero velocity,

(c) with constant speed must have zero acceleration,

(d) with positive value of acceleration must be speeding up

Asked by Pragya Singh | 1 year ago |  87

1 Answer

Solution :-

Right answer is  (a) True

Explanation:-

You are at rest so you have a zero speed but at the same time the acceleration due to gravity is acting on you.

Thus a non-zero acceleration is acting on you!

Right answer is  (b) False

Explanation:-

No it have zero velocity cause if speed is zero it means distance also zero and if distance is zero than there is no any shortest path and no. velocity

Right answer is  (c) True 

Explanation:-

(if the particle rebounds instantly with the same speed, it implies infinite acceleration which is unphysical)

Right answer is  (d) False 

Explanation:-

(true only when the chosen positive direction is along the direction of motion)

Answered by Abhisek | 1 year ago

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