A block of mass m = 4.4 kg slides from left to right across a frictionless surface with a speed 9.2 m/s It collides in a perfectly elastic collision with a second block of mass M that is at rest. After the collision, the 4.4-kg block reverses direction, and its new speed is 2.5 m/s the block of mass M travels to the right speed V of 6.7 m/s. What is M?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

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.