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 speed of the car from P to Q?

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

Answer 1

The correct option is A Speed remains constant

speed is magnitude of velocity of the body.

so if speedometer is showing 40 km/h then its speed is constant no doubt may be velocity is changing its direction but between point P and Q direction is also constant so speed as well as velocity both are constant. so best possible answer is option A.