A plasticine ball being dropped onto a metal block. The plasticine ball changes its shape after the impact. 1)Name the force involved during the impact. 2)Explain why the plasticine ball changes its shape after the impact

1. Action-reaction force. 2. It is not a rigid body

Explanation:

1. The force involved during the impact is an action-reaction force pair. The plasticine ball exerts a force on the metal block, while the metal block exerts an equal but opposite force on the plasticine ball.

2. The plasticine ball changes its shape after the impact because, it is not a rigid body. A rigid body is a body that does not change its shape when external forces are applied to it.

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length