Select the correct statement. For a part...

Select the correct statement. For a particle moving on a straight line

Average speed is equal to magnitude of average velocity

Average speed may be greater than magnitude of average velocity

Average velocity = instantaneous velocity if velocity is constant

Moving with constant acceleration, average velocity for given time interval is arithmetic mean of initial and final velocity

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B, C, D

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For a particle moving in a straight line

If velocity is negative and acceleration is positive then speed increases.

if velocity is positive and acceleration is negative then speed decreases.

if velocity is zero at an instant then acceleration must also be zero at that instant.

it is possible that speed of a particle is never zero in an interval of time, but average speed is zero.

It the velocity and acceleration have opposite sign, the object is slowing down.

If the position and velocity have opposite sign, the particle is moving towards the origin.

If the velocity is zero at an instant, the acceleration should also be zero at that instant.

If the velocity is zero for a time interval, the acceleration is zero at any instant within the time interval.

If the position and velocity are in opposite direction, the particle is moving towards the origin

If the acceleration and velocity are in opposite direction. The particle is slowing down

If the velocity is zero for a time interval the acceleration is zero at any moment within that time interval

If the velocity is zero at any instant, then the acceleration must be zero at that instant .