A16.0g bullet is shot into a wood block at rest with a mass of 2450 g on a frictionless surface. the block moves 1.2m/s after the bullet strikes and becomes lodged in the block. find the speed of the bullet before striking the block.

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.

You can decrease the resistance of a length of wire by

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell