Question

A lorry of mass 3000kg traveling at a constant velocity of 72km/h collides with a stationary vehicle of mass 600kg. The impact takes 1.5sec before the two move together at a constant velocity for 15sec . calculate the impulsive force

Answer 1

[AI-generated answer — Bot GPT 3.5]

To calculate the impulsive force, we first need to calculate the final velocity of the two vehicles after the collision.

Initial momentum = Final momentum

(3000kg * 72km/h) + (600kg * 0) = (3600kg * Vfinal)

216000 + 0 = 3600 * Vfinal
Vfinal = 60 km/h

Now, we can calculate the change in momentum during the collision:

Change in momentum = Final momentum - Initial momentum
Change in momentum = (3600kg * 60km/h) - (3000kg * 72km/h)
Change in momentum = 216000 - 216000
Change in momentum = 0

Now, we can calculate the impulsive force:

Impulsive force = Change in momentum / Time
Impulsive force = 0 / 1.5 sec
Impulsive force = 0

Therefore, the impulsive force during the collision is 0.