Question Detail
Question
A car having a mass of 1000 kg is moving at a speed of 30 metres/sec. Brakes are applied to bring the car to rest. If the frictional force between the tyres and the road surface is 5000 Newtons, the car will come to rest in
Correct Answer
Option D is the correct answer.
Detailed Explanation
Deceleration a = F/m = -5000/1000 = -5 m/s². Using v = u + at, 0 = 30 + (-5)t => t = 30/5 = 6 seconds.
Hint
Find deceleration from force and mass, then use the first equation of motion.