6. Forces always occur a. When velocities are constant c. in pairs b. as single quantities d. in triplets 7. Newton's third law of motion states that for every action there is a. An equal and opposite reaction c. an equal and unbalanced force b. An unbalanced force d. an equal force pointing in same direction 8. Aulus hits a nail with a hammer. During the collision, there is a force a. On the hammer but not on nail c. On the nail but not on the hammer b. On the nail and also in the hammer d. There are no forces on both objects 9. Consider a bullet shoot from a gun, the acceleration of bullet is a. Greater than acceleration of gun c. equal but opposite to acceleration of gun b. Equal to the acceleration of gun d. less than acceleration of gun 10.An unfortunate bug splatters against the windshield of moving car. Compared to the force car on the bug, the amount of force of the bug on car is a. Larger b. smaller c. the same d. all are correct 11. The stretching of a rubber band stores what type of energy? a. Acceleration b. Mechanical energy c. Kinetic energy . Potential energy 12. Which of the following has the LEAST kinetic energy? a. A ball that is not moving c. A car running at 30 cph catelte orbiting at space d. A car slowing down reaching a pedestrian lane​