A head-on collision occurs between a 1.00 g ball traveling forward at speed v =

Question

A head-on collision occurs between a 1.00 g ball traveling forward at speed v = 3.00 m/s and a 2.00 g ball initially at rest. After the collision, the smaller ball is observed traveling backward at 1.0 m/s and the larger ball traveling forward at 2.00 m/s. What type of collision is this? a) Elastic b) Inelastic c) Both elastic and inelastic d) Neither elastic or inelastic Two toy cars are used to test both inelastic and elastic collisions. One car has a mass m_1 = 1.0 kg, whereas the other car has a mass m_2 = 2.0 kg. The heavier car is initially at rest whereas the lighter car has an initial velocity v = 3.2 m/s as indicated in the sketch below. a) Determine the final velocity of the system of both cars assuming they stick together after the collision with the help of a little magnet b) Imaging another case that the mass m_1 bounces off elastically of mass m_2. Determine the velocity of each car after the collision. References: p = mv, K = 1/2 mv^2

Explanation / Answer

1) This is a case of elastic collision as after the collision both the bodies are moving with some velocity.

In elastic collision kinetic energy is conserved.

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