7. [-I1 Points] DETAILS SERPSE1O 9.4.0P.017. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER Two blocks are free to slide along the frictionless wooden track shown below. The block of mass m1 = 4.99 kg is released from the position shown, at height h = 5.00 m above the at part of the track. Protruding from its front end is the north pole of a strong magnet, which repels the north pole of an identical magnet embedded in the back end of the block of mass m2 = 10.1 kg, initially at rest. The two blocks never touch. Calculate the maximum height to which m1 rises after the elastic collision. Need Help? _'_' 8. [-I2 Points] DETAILS SERPSE10 9.4.P.015. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 4m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (a) What is the speed vf of the two vehicles immediately after the collision? Vf= (b) What is the change in kinetic energy of the cartruck system in the collision? AK: Need Help? _ 9. [-I1 Points] DETAILS SERPSE1O 9.4.P.016. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A 7.00 g bullet, when fired from a gun into a 1.20 kg block of wood held in a vise, penetrates the block to a depth of 7.00 cm. This block of wood is next placed on a frictionless horizontal surface, and a second 7.00 g bullet is fired from the gun into the block. To what depth will the bullet penetrate the block in this case? :10\" Need Help? _