# Physical Science: Motion, Forces, and Energy, Book M

## Chapter 1: Motion and Momentum

### Motion and Momentum

 1. When something accelerates then stops accelerating, what happens to the object? Need a Hint? A) slows B) stops completely C) goes faster D) continues to move at a constant velocity 2. When a negative acceleration is graphed, the line __________. Need a Hint? A) slopes upward B) goes to zero C) slopes downward D) remains constant 3. The __________ measures the speed during an entire trip. Need a Hint? A) overall speed B) instantaneous speed C) average speed D) acceleration 4. An object that travels 100 m in 20 s has what speed? Need a Hint? A) 5 m/s B) 2 000 m/s C) 50 m/s D) 200 m/s 5. During a(n) __________ collision, objects bounce off each other. Need a Hint? A) elastic B) solid C) inelastic D) explosive 6. Something is in motion if it __________. Need a Hint? A) changes state B) changes properties C) changes distance D) changes position 7. When something slows, its acceleration is __________. Need a Hint? A) constant B) positive C) instantaneous D) negative 8. In an inelastic collision between a moving object and a stationary object, the final velocity of both objects is __________. Need a Hint? A) zero B) less than the original velocity of the moving object C) more than the original velocity of the moving object D) the same as the original velocity of the moving object 9. What is the tendency for an object to resist change in its motion? Need a Hint? A) momentum B) matter C) inertia D) mass 10. To find acceleration, you first subtract __________ than divide by time. Need a Hint? A) velocity from distance B) final time from initial time C) initial speed from final speed D) final speed from initial speed 11. __________ is distance divided by time. Need a Hint? A) Velocity B) Acceleration C) Displacement D) Speed 12. The mathematical equation for momentum is __________. Need a Hint? A) momentum = mass/velocity B) momentum = mass x velocity C) momentum = velocity/mass D) momentum = weight x speed 13. During any collision, some energy is lost due to __________. Need a Hint? A) elasticity B) conservation C) momentum D) friction 14. When a car goes around a curve at 20 mph, the __________ changes. Need a Hint? A) average speed B) speed C) velocity D) instantaneous speed 15. On an acceleration graph in which the line is level, the acceleration is __________. Need a Hint? A) positive B) zero C) changing D) negative 16. At the beginning of a track race, the instantaneous speed of all runners is __________. Need a Hint? A) unable to be measured B) the average speed C) 0 m/s D) different 17. What are the SI units for acceleration? Need a Hint? A) s/m2 B) m2/s C) m/s2 D) s2/m 18. An object that has the same speed but changes direction is __________. Need a Hint? A) speeding B) displacing C) accelerating D) slowing down 19. What is a measure of how hard it is to stop a moving object? Need a Hint? A) momentum B) inertia C) velocity D) acceleration 20. When you graph speed, time is on the __________. Need a Hint? A) x-axis B) z-axis C) y-axis D) vertical axis