Answer to Question #338642 in Mechanical Engineering for steve

Question

A projectile launcher is used to launch a 0.5 kg ball into the air. The

launcher is connected to a 1-kg mass and starts from rest with the spring compressed to a

length of 15 cm. The unstretched length of the spring is 75 cm. When the launcher is

released from rest, the 1-kg mass will impact the ball and the ball will project in the air.

Determine a suitable spring constant and angle θ for the ball to reach a maximum height of

20 m (measure from the current position of the ball). The Coefficient of restitution between

1-kg mass and ball is 0.8. (Note: first determine an arbitrary angle and find the spring

constant for that)