Question

which of these objects is accelerating? a a car driving at a constant speed of 20m/s while going in a straight line b a car driving at a constant speed of 45m/s while going in a straight line c a car driving at a constant speed of 45m/s while going around a corner d a parked car

Explanation:

Acceleration is a change in velocity, which includes changes in speed or direction. Options a and b have constant - speed and straight - line motion (no change in direction), so no acceleration. Option d has zero speed and no change. Option c has a change in direction while speed is constant, so there is acceleration.

Answer:

C. A car driving at a constant speed of 45m/s while going around a corner