1. Motion Review

2. Question 1
Describe an electromagnetic wave in terms of what kind of wave it looks like and what it travels through.

3. Answer 1
An electromagnetic wave is a transverse wave and can travel through a vacuum.

4. Question 2
What mathematical equation could represent the length of Q?

5. Answer 2
Q = S + T

6. Question 3
A student throws a ball against a wall. What is happening in the picture in terms of forces exerted?

7. Answer 3
The force from the wall on the ball is equal to the opposite force from the ball on the wall.

8. Question 4
A ball traveled 40 meters at a speed of 8 meters per second.
T = D/S
How long did it take the ball to travel the 40 meters?

9. Answer 4
5 seconds

10. Question 5
Work is performed by a lever when a load (L) of 5 N is applied at one end, as shown. Using the formula, what force is required to make the lever balance?

11. Answer 5
10 newtons

12. Question 6
A lever and an inclined plane are shown. What is the function of these simple machines?

13. Answer 6
They both can help raise objects from the ground.

14. Question 7 Classify each kind of wave as transverse or longitudinal:
ultraviolet waves
radio waves
sound waves
x-ray waves

15. Answer 7 ultraviolet waves—transverse radio waves—transverse
sound waves—longitudinal
x-ray waves—transverse

16. Question 8
Compare these two waves in terms of crests, wavelength, frequency, and amplitude.

17. Answer 8 Crests: same Wavelength: Wave 2 is greater
Frequency: Wave 1 is greater
Amplitude: same

18. Question 9
A car is traveling forward at an initial velocity of 20 meters per second. The car then accelerates forward at a rate of ½ meter per second2 for 30 seconds.
Vf = Vi + at
Velocity(final) = velocity(initial) + acceleration x time
What is the final velocity of the car?

19. Answer 9
35 meters per second

20. Question 10 A ball rolls 20 meters in 5 seconds. S = d/t
What is the average speed of the ball?

21. Answer 10
4 meters per second

22. Question 11
A student applied a force of 20 newtons to pull a wagon a distance of 10 meters in the direction of the applied force.
W = fd
How much work did the student do to the wagon?

23. Answer 11
200 Joules or 200 newton-meters

24. Question 12
A student needs to move a heavy object across 50 meters of level ground. Which simple machine will most help the student move the object?

25. Answer 12
wheel and axle

26. Question 13
Describe the difference between longitudinal waves and transverse waves in terms of particle movement.

27. Answer 13
Particles in a longitudinal wave travel in the direction of the wave, while particles in transverse waves travel perpendicular to the wave.

28. Question 14
Name the labeled parts of the wave.

29. Answer 14
1—amplitude
2—wavelength
3—wave height
4—crest

30. Question 15
What is Newton’s 1st Law of Motion?

31. Answer 15
An object at rest will stay at rest and an object in motion will stay in motion unless acted on by an unbalanced force.

32. Question 16
D = rt
A cheetah can run at a rate of 30 meters per second. How far could a cheetah travel in 10 seconds.

33. Answer 16
300 meters

34. Question 17
A student performed 20 joules of work by raising an object 2 meters with a pulley.
F = w/d
What was the force on the object?

35. Answer 17
10 newtons

36. Question 18
A logger splits a piece of wood. What simple machine splits the wood?

37. Answer 18
wedge

38. Question 19
Which diagram best represents particle movement in a transverse wave?

39. Answer 19
the third picture

40. Question 20
As wavelength decreases, what happens to the crests of a wave?

41. Answer 20
They get closer together.

42. Question 21
F = ma
Explain this equation in terms of acceleration.

43. Answer 21
The acceleration of an object depends on the force acting upon it and its mass.

44. Question 22
s = d/t
A student rode a bicycle 40 miles in 2 hours. What was the student’s average speed?

45. Answer 22
20 miles per hour

46. Question 23
F = w/d
How much force was applied to a box that required 50 joules of work to push it up a 5-meter-long ramp?

47. Answer 23
10 newtons

48. Question 24
A portion of the human arm works as a simple machine. Which simple machine is most like the human arm?

49. Answer 24
a lever