Question

A 200 kg Blue car is moving rightward at 2 m/s and collides inelastically with a 200 kg Red car.
What must the speed of the Red car be so that both cars come to a stop? (Adjust the Blue car mass to 200 kg and its velocity to +2 m/s. Set the bumper type to Locking. Adjust the mass of the Red car to 200 kg. Adjust the speed of the Red car so that, when they collide, both cars come to a stop.)

Answer 1

With the use of formula, the speed of the red car must be 2 m/s

COLLISION

There are two types of collision.

• Elastic Collision

• Inelastic Collision

In Inelastic collision, the momentum is conserved while energy is not. Also, both mases will move with a common velocity after collision.

Given that a 200 kg Blue car is moving rightward at 2 m/s and collides inelastically with a 200 kg Red car. For both cars to come to a stop, the final velocity V will be equal to zero.

by using the formula

$M_{1}U_{1} - M_{2}U_{2} = ( M_{1} + M_{2} ) V$

Where V = 0

$M_{1}U_{1} = M_{2}U_{2}$

Substitute all the parameters into the equation

200 x 2 = 200$U_{2}$

$U_{2}$ = 400 / 200

$U_{2}$ = 2 m/s

Therefore, the speed of the red car must be 2 m/s

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