a 1000 kg car moving at 15.0 m/s collides with a stationary truck of mass 12,000

Question

a 1000 kg car moving at 15.0 m/s collides with a stationary truck of mass 12,000 kg. after collision both stick together and move. what’s is the velocity of both the car and the truck after collision? is the collision elastic or in elastic? what is the impulse on the car and the truck a 1000 kg car moving at 15.0 m/s collides with a stationary truck of mass 12,000 kg. after collision both stick together and move. what’s is the velocity of both the car and the truck after collision? is the collision elastic or in elastic? what is the impulse on the car and the truck a 1000 kg car moving at 15.0 m/s collides with a stationary truck of mass 12,000 kg. after collision both stick together and move. what’s is the velocity of both the car and the truck after collision? is the collision elastic or in elastic? what is the impulse on the car and the truck a 1000 kg car moving at 15.0 m/s collides with a stationary truck of mass 12,000 kg. after collision both stick together and move. what’s is the velocity of both the car and the truck after collision? is the collision elastic or in elastic? what is the impulse on the car and the truck

Explanation / Answer

As momentum must be conserved in the process,

1000 x 15 + 0 x 12000 = (1000 + 12000) v

Or

v = 15000/13000 = 1.154 m/s is the final speed of the car and truck.

Collision is inelastic. Because both bodies stick with each other.

Impulse is given by I = change in momentum of any one of those.

Final momentum of truck alone = 12000 x 1.154 = 13846.154 kgm/s

Hence, impulse = 13846.154-0 = 13846.154 Ns

It is also same as the decrease in the momentum of car.

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