1. Motion and Force Review

2. Motion is a change in Position over time Speed over time
Velocity over time
Acceleration over time

3. Position over time

4. Bob walks 100 m in 50 s, moving at different speeds
Bob walks 100 m in 50 s, moving at different speeds. Dividing 100 m by 50 s gives you Bob’s
Acceleration
Average speed
Direction
velocity

5. Average speed

6. Sue is riding her bicycle. She begins pedaling harder
Sue is riding her bicycle. She begins pedaling harder. What do you predict will happen?
Her velocity will decrease
Her acceleration will decrease
Her speed will increase
Her position will not change

7. Her speed will increase

8. Speed in a specific direction is
Acceleration
Distance
Position
velocity

9. velocity

10. Susie walked north at 100m/s
Susie walked north at 100m/s. Mack had a different velocity but het same speed. He could have walked
North at 200 m/s
South at 50 m/s
West at 100 m/s
North at 100 m/s

11. West at 100 m/s

12. Clint drives at a steady velocity. Her acceleration is
Equal to zero
In the same direction as her motion
Opposite to her motion
At a right angle to her motion

13. Equal to zero

14. Acceleration measures a change in
Location
Direction
Position
velocity

15. velocity

16. Lisa is watching a friend run a race
Lisa is watching a friend run a race. What does she need to know to find her friend’s speed
Distance and time
Position and motion
Distance and position
Time and motion

17. Distance and time

18. Hallie walked 18 m in 12 s. She did not walk at a steady speed, so 1
Hallie walked 18 m in 12 s. She did not walk at a steady speed, so 1.5 m/s was her a) acceleration b) average speed c) direction d) velocity

19. b) average speed

20. What is an example of zero acceleration?
A school bus coming to a stop
An ice hockey player turning around
A person walking on a treadmill at a steady rate
An airplane speeding up along a runway

21. A person walking on a treadmill at a steady rate

22. Zeus walks one mile west
Zeus walks one mile west. Missy walks one mile east in the same amount of time. They have
The same velocity
Different average speeds
Different velocities
The same location

23. Different velocities

24. Velocity is different from speed because velocity also includes
Motion
Direction
Distance
Acceleration

25. Direction

26. Hannah jogged 200 m in 25 seconds and then 100 m in 15 seconds
Hannah jogged 200 m in 25 seconds and then 100 m in 15 seconds. She could find his average speed by dividing
200 m by 40 s
300 m by 25 s
300 m by 40 s
100 m by 15 s

27. 300 m by 40 s

28. Melanie is accelerating as she skates on the ice
Melanie is accelerating as she skates on the ice. However, the speed at which she is skating has not changed. A possible explanation for this is that Melanie
Is skating in a wide circle
Is skating in a straight line
Has reached the top speed at which she can skate
Has stopped skating and is now standing still

29. Is skating in a wide circle

30. A push or pull is called
Motion
Force
Acceleration
velocity

31. Force

32. Willie combines all the forces acting on a tennis ball
Willie combines all the forces acting on a tennis ball. He is finding the
Net force
Inertia force
Gravitational force
Frictional force

33. Net force

34. DT is sliding a box across the floor
DT is sliding a box across the floor. What do he need to know to calculate the force on the box?
Mass and inertia
Acceleration and friction
Mass and acceleration
Friction and gravity

35. Mass and acceleration

36. Inertia is the resistance of an object to a change in its
Gravity
Motion
Mass
Balanced force

37. Motion

38. A soccer player kicks a ball that is at rest
A soccer player kicks a ball that is at rest. What do you predict will happen?
The ball will not move
The ball will lose momentum
The ball will accelerate in the opposite direction the applied force
The ball will accelerate in the same direction the applied force

39. The ball will accelerate in the same direction the applied force

40. According to Newton’s second law of motion, force equals mass times
Velocity
Momentum
Acceleration
mass

41. Acceleration

42. The momentum of an object is the product of its
Mass and acceleration
Mass and velocity
Force and mass
Net force and mass

43. A bowling ball rolls down the lane and hits some pins before rolling off the lane. What happens to the momentum of the ball as it hits the pins?
Some of the ball’s momentum is transferred to pins
All of the ball’s momentum is transferred to pins
None of the ball’s momentum is transferred to pins
Pins stop the ball from rolling farther

44. Some of the ball’s momentum is transferred to pins

45. If one force is balance by another force, the
Effect is the same as no force at all
Effect is a positive force
Size of the first force is balance by the direction of the second force
The direction of the first force is balance by the size of the second force

46. Effect is the same as no force at all

47. One way to decrease acceleration is to
Decrease force and mass equally
Increase force more than mass
Increase mass
Decrease mass

48. Increase mass

49. Centripetal force keeps an object moving in a circle. The force points
Toward the center of the circle
Toward the out edge of the circle
To the right of the center of the circle
Away from the circle in all directions

50. Toward the center of the circle