Question

Which of the following example shows an object that does not change its magnitude of velocity but only its direction of motion?

• A. Parachutist bailing out of an aeroplane
• B. Uniform motion of a body along a circular path
• C. A freely falling body
• D. A car moving with uniform speed in a straight line

Answer 1

The correct option is B Uniform motion of a body along a circular path

In uniform circular motion, the speed of the body remains same but its direction changes continuously. So, in a uniform motion along a circular path, the magnitude of velocity remains same but the direction of motion changes.

When a parachutist jumps out of an aeroplane, his speed increases whereas direction remains the same.
A body moving upwards has a speed that keeps reducing.

A car moving in a straight line with constant speed has the same speed. However, the direction remains the same as well.