Home › JEE Main › Physics › Newton's Laws of Motion › A car of mass 1000 kg moving at 36 km/h is stopp…
A car of mass 1000 kg moving at 36 km/h is stopped by brakes in 5 seconds. Average force exerted by brakes:
A1000 N
B2000 N
C5000 N
D10000 N
Answer & Solution
Correct answer: B. 2000 N
Convert: 36 km/h = 10 m/s. Deceleration a = (0 - 10)/5 = -2 m/s². Braking force F = ma = 1000 × 2 = 2000 N.
Related questions
A book sliding across a smooth wooden desk gradually slows and stops. The force responsiblA gun of mass $4$ kg fires a bullet of mass $0.04$ kg at $300$ m/s. Recoil speed of the guA batsman strikes a ball of mass $0.15$ kg moving at $20$ m/s, sending it back at $20$ m/sA coin sitting on a bus seat slides forward when the bus brakes suddenly. This is best expA pendulum of mass m swings to amplitude angle θ. At the lowest point of swing, the TENSIOTwo equal masses (3 kg each) connected by a light string over a frictionless pulley. One oA 50 kg person stands on a scale in an elevator accelerating UP at 2 m/s². Scale reading:A car turns a corner of radius 50 m at 20 m/s. Minimum coefficient of friction needed (g =