JEE Main 2012 Physics question

A car of mass 1000 kg is moving at a speed of 30 m/s. Brakes are applied to bring the car to rest. If the net retarding force is 5000 N, the car comes to stop after travelling d m in t s. Then

• (1)d = 150, t = 5
• (2)d = 120, t = 8
• (3)d = 180, t = 6
• (4)d = 90, t = 6Correct