Question

A driver is driving his car along a road is shown in Fig. The driver makes sure that the speedometer reads exactly 40 km/h. What happens to the velocity of the car from P to Q?

• A. Velocity remains constant
• B. Velocity first increases then decreases
• C. Velocity first decreases then increases
• D. Nothing can be decided

Answer 1

Answer: (A)

Velocity remains constant

As said in the question speedometer reads 40. So the magnitude of the velocity is not changing. The path PQ is a straight line. So the direction of velocity is also not changing. So it is clear that the velocity of the car is constant.