Question

A car weighing 1600kg moving with a velocity of 30m/s retards uniformly thereby coming to rest in 20 second. calculate (i) initial momentum of car (ii) final momentum of car (iii) rate of change of momentum(iv) acceleration of car (v) magnitude of force applied​

Answer 1

Explanation:

car weighing 1600kg moving with a velocity of 30 meter per second uniformly coming to rest in 20 seconds calculate

1, initial momentum

2, final momentum

3, rate of change of momentum

4,acceleration of the car

5, magnitude of the force

(1) 1600*30

(2) 0

(3) p = mv, so dp/dt = m dv/dt = 1600*(0-30)/(20-0) = -2400 kg-m/s

(4) see (3)

(5) F = ma

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