7. A shell is fired from a gun mounted on a battleship. Which of the following statement is NOT true? a. There will be a force to push the boat in the opposite direction of the shell. b. The recoil spring on the barrel is to minimize the force on the deck of the ship. c. Neglecting fluid friction, the momentum of the boat and shell have the same magnitude d. To calculate the speed of the boat we would need to know the recoil length of the gun. A larger mass of shell will increase the recoil force felt by the ship 8. A 53-kg person carrying a 5.0-kg ball slides along a horizontal frictionless surface. He tosses the ball perpendicular to his direction of travel relative to himself. His path will not change. b. The ball will have a smaller angle from the original path than he will. C. Ilis speed does not change. d. He speeds up e. Ile slows down. 9. Two young sisters with a combined mass of 75 kg ride on a cart of mass 30.0 kg travelling at 2.0 m/s. If they jump off together so they land with zero speed relative to the ground, the change in speed of the carl is a. 0 m/s d. 5.0 m/s b. 2.0 m/s e. 7.0 m/'s C. 4.0 m/'s 10. Two objects strike a glancing blow. The diagram below shows the moments of some of the objects are shown before and after the collision. Before the collision P After the collision Which vector best represents the momentum of object P after the collision? A B c D E D FF