1. What must be present for an object to have momentum? br A) An internal impulse br B) Velocity br C) All are necessary br D) An external force br E) An internal force br br 2. What is conserved within any system? br A) Momentum br B) Velocity br C) Impulse br D) Mass br E) Speed br br 3. What does it mean to say that momentum is conserved? br A) There is an equal amount of change br B) There is no change for the individual components br C) None are correct br D) The change is negligible br E) There is no net change br br 4. Why do the cannon and cannonball cancel out each others' momenta? br A) They have equal and opposite masses br B) They have equal and opposite momenta br C) They have the same mass br D) They have equal and opposite velocities br E) They have the same velocity br br 5.