Question

Mark the correct statment(s) for a particle moving in straight line:
a) If the velocity and acceleration have the opposite signs, the object slows down.
b) If the position and velocity have the opposite signs, the particle moves towards the origin.
c) If the velocity is zero at an instant, the acceleration should also be zero at an instant.
d) If the velocity is zero for a time interval, the acceleration is zero at any instant within the time interval.​

Answer 1

If the velocity and acceleration have opposite sign, the object is slowing down. ... If the velocity is zero for a time interval, the acceleration is zero at any instant within the time interval.so ur answer is option a and d

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Answer 2

Ur answer is option a and d