A springloaded gun shoots a plastics ball The trigger has ju

A spring-loaded gun shoots a plastics ball. The trigger has just pulled and the ball is starting to move down th barrel. The barrel is horizontal. Identify all the forces acting on the ball.

Solution

In this situation bullet will experince forces:

                                             1. spring force in the direction of velocity

                                              2. kinetic friction due to barrel acts back means opposite to velocity

                                              3. normal reaction due to barrel surface under bullet acts vertically upward

                                              4. weight acts vertically down ward.