OR
A car is moving with a velocity of 72 km/h and it takes 5 s to stop after
the brakes are applied. Calculate the force exerted by the brakes on
the car if its mass along with the passengers is 1500 kg
Answers
Answered by
4
Explanation:
u = 72km/h = 72 × 5/18 => 20 m/sec
t = 5 sec, v = 0, m = 1500 kg , f = ?
f = ma
we have to first find the acceleration/deceleration
v = u + at
0 = 20 + a × 5
- 20 = a × 5
therefore a = - 20/5 => - 4 m/sec²
force exerted f = 1500 × - 4 => - 6000 N
Similar questions