Which of the following situations is impossible for a particle traveling along a

Question

Which of the following situations is impossible for a particle traveling along a straight line? A. The particle has constant, non-zero acceleration and constant velocity. B. The particle's velocity and acceleration are in the same direction. C. The particle has zero velocity but non-zero acceleration. D. The particle's velocity and acceleration are in opposite directions. A particle traveling along the x-axis in the positive x-direction is slowing down. Which correctly describes its acceleration? A. Its acceleration is in the +x direction. B. Its acceleration is decreasing in magnitude as the particle slows down. C. Its acceleration is zero. D. Its acceleration is in the -x direction. Sasquatch throws a rock horizontally off a cliff. After the rock is released, which statement about its acceleration is correct? A. Its magnitude is constant. B. Its magnitude is constantly increasing. C. Its magnitude is constantly decreasing. D. Its magnitude is zero.

Explanation / Answer

7. Result : ( C) is the correct option

Explanation:

If a particle is traveling along a straight line , then it is impossible that velocity being zero with non zero acceleration .

As we know that , acceleration = (change in velocity )/ time

Hence. Particle with zero velocity will be at rest .

8. Result : ( D) is the correct option

Explanation :

A particle will slow down if , direction of acceleration is opposite to that of velocity.

9. (A) is the correct option

Explanation : the only acceleration acting is acceleration due to gravity ( g) , it is constant.

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