1. Final Exam Study Guide

2. The distance traveled by an object divided by the time it takes to travel that distance is called
Average Speed

3. In order to determine speed, you must know
Distance & Time

4. What is the speed of an object at rest?
Zero Km/hr

5. The difference between speed and velocity is that velocity includes
direction

6. An airplane is flying at 635 km per hour at an altitude of 35 000 m
An airplane is flying at 635 km per hour at an altitude of m. It is currently over Kansas and is approximately 16 minutes ahead of its scheduled arrival time. What is its velocity?
No direction = 0

7. Acceleration is defined as the change in velocity divided by
Time

8. The SI unit for acceleration is
Meter per second2
m/s2

9. On a velocity-time graph, a line with a negative slope indicates that the object is
Slowing Down

10. When the velocity of an object changes, it is acted upon by a(n)
Force

11. A tug-of-war that results in one team pulling the other across the line is an example of
Unbalance force

12. Friction is defined as
A force that opposes motion by acting in the opposite direction of motion

13. experiencing friction
A force is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusion can be drawn?
experiencing friction

14. object is in motion when
moves in a point of reference

15. If the slope of a line on a distance-time graph is 1, the speed of the object being plotted is
increasing

16. How can the friction on a slide be reduced?
Add water

17. friction force must be equal to mg
A car is parked on a hill. In order to keep the car from rolling downhill, how great must the static friction acting on the car be?
friction force must be equal to mg
Mass*gravity

18. Weight is best described as
Mass*gravity

19. When objects are moved further apart from each other, the force of gravity
Decreases

20. The greatest gravitational force would occur between the Moon & Earth, or two marbles.

21. The law that states that every object maintains constant velocity unless acted on by an unbalanced force is
First

22. The law that states that for every action force there is an equal and opposite reaction force is
Third

23. The law that states that the unbalanced force acting on an object equals the object’s mass times its acceleration is
Second

24. The SI unit of force, named for the scientist who described the relationship between motion and force, is called the
Newton

25. Which of the following units is used to measure acceleration in free fall?
m/s2

26. Earth pulls on the moon and holds the moon in its orbit
Earth pulls on the moon and holds the moon in its orbit. The moon pulls on Earth with an equal and opposite force. This is an example of
Newton’s 3rd Law

27. What is the unbalanced force that slows down a ball rolling across the floor?
Friction

28. A boy pushes on a parked car with a force of 200 N
A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car?
W = F*d 0

29. What are the units of work?
J or N*m or Kg*m2/s2

30. Which of the following processes requires the most work?
A 10 kg weight rests on a table.
A person holds a 1 kg weight still with outstretched arms.
A person lifts a 1 kg weight 1 m off the floor.
d. A 10 kg ball is rolled across the floor at a constant speed for a distance of 10 m.

31. A man pushes a crate along a factory floor by exerting a force of 70 N
A man pushes a crate along a factory floor by exerting a force of 70 N. If the crate moves a distance of 4.0 m, how much work does the man perform?
280J

32. What are the units of power?
Watts

33. A weightlifter presses a 200 N weight 1 m over his head in 2 seconds
A weightlifter presses a 200 N weight 1 m over his head in 2 seconds. What is the power of the weightlifter?
100W

34. Work can _______ energy. Energy can do _________.
make
work
Make
work

35. What is the gravitational potential energy of a 70 kg box that is 4
What is the gravitational potential energy of a 70 kg box that is 4.0 m above the ground?
2744J

36. Gravitational potential energy depends on the
Height

37. Gravitational potential energy depends on the
height gravity and mass

38. A medicine ball has a mass of 10 kg and is thrown with a speed of 2 m/s. What is its kinetic energy?
20J

39. The kind of energy associated with atomic bonds is
Nuclear energy

40. An object weighing 100 N is dropped from the top of a building and falls a distance of 35 m to the ground. How much work does gravity do on the object from the time it is dropped to the time it hits the ground?
3500J

41. The law of conservation of energy states
that energy cannot be created nor destroyed.

42. Temperature is
the average kinetic energy of a molecules, feels hot or cold, can be measured

43. heat increases temperature
As the kinetic energy of the molecules in a substance increases, the
heat increases temperature

44. The transfer of energy caused by the collision of molecules is called
conduction

45. The transfer of energy by the movement of fluids or gases with different temperatures is called
convection

46. Energy from the sun reaches Earth by
radiation

47. Convection currents rise in air because
hot air is less dense

48. Which method of energy transfer does not involve movement of matter?
Radiation

49. Which of the following substances is the best conductor of transferring energy as heat? a. carbon dioxide gas c. iron b. water d. rubber

50. Radiation and conduction
A cold-blooded reptile basks on a warm rock in the sun. Its body is warmed by
Radiation and conduction

51. The End!
The End!
The End!
The End!
The End!
The End!
The End!