3. What is the relationship between force and acceleration? a. if force increases acceleration increases b. if force decreases acceleration increases c. if force increases acceleration decreases d. if force decreases acceleration is constant 4. Which of the following quantities, when doubled, has the greatest effect on the amount of kinetic energy? a. mass b. size c. speed d. weight 5. Which happens to kinetic energy if mass is doubled? a. doubled b. the same c. tripled d. quadrupled 6. Kinetic energy is the energy an object possessed due to its a. mass b. motion c position d. weight 7. As a ball falls freely. a. its kinetic energy decreases but potential energy decreases b. its kinetic energy decreases but potential energy increases c. its kinetic energy increases but potential energy decreases d. its kinetic energy increases but potential energy increases 8. What is the net force of an object at rest? a. tension force b. force of gravity c. opposite forces d. Zero d. 11.8m/s2 9. What is the approximate value of gravitational force? a. 8.9 m/s2 b. 9.8m/s2 c. 10.8m/s2 10. What force pulls an object back to the Earth? a. applied c. magnetic b. gravitational d tension​