Imagine that you're observing a collision. Which action would allow you to determine whether the collision is inelastic?

A. Measure the force of impact.

B. Observe whether the colliding objects change their shape.

C. Measure the acceleration of the colliding objects.

D. Measure the mass of the colliding objects.

B. Observe whether the colliding objects change their shape.

Explanation:

When two or more bodies interact simultaneously for a short time is known as collision. In collision, they exert forces on each other which may result in a change in its motion due to internal forces.

The collision in which conservation of kinetic energy does not take place is defined as inelastic collision. In some cases the bodies get deformed because of change of kinetic energy into other forms of energy which may produce heat.