10) If the distance between the center of the ball and the center of the target is less than the sum of the radius of the ball and the radius of the target, then explain how come that means the two have collided. Draw a picture if it helps your explanation.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.