Question

a car of mass 500 kg is moving with a velocity of 36 km/ hr suddenly brakes applied and car comes into rest after traveling a distance of 100 metre find the force applied by the brakes​

Answer 1

Answer:

250 kg m/sec²

Explanation:

Initial velocity, u = 36km/h = 36×5/18 = 10 m/sec

Final velocity, v = 0 m/sec

Distance travelled, s = 100 m

Using formula v² - u² = 2as calculate retardation (a, will be negative because force is applied to stop the car)

0² - 10² = 2×a×100

a = -100/200 = -0.5 m/sec²

Force, F = ma = 500 × 0.5 = 250 kg m/sec²