Chapter 2/3 Review

1. A change in position

2. Reference Point

3. The rate of change in position (rate of motion)

4. The rate of motion at any given instant.

5. Speed that does not change.

6. The total distance traveled divided by total time of travel.

7. Instantaneous Speed

8. s= d / t (m/s or km/hr)

9. t= d / s (sec. or hrs.)

10. d= s x t (m or km)

11.Speed and direction

12. The rate of change in velocity.13.Speed up; Positive

Acceleration14.Slow down; Negative

Acceleration15.The amount of time that

passed while acceleration was taking place.

16.a = V final – V initial

time

17. A push or pull one body exerts on another.

18. Forces that are equal in size and opposite in direction.

19. Forces that are not equal in size but opposite in direction.

20.The tendency of an object to resist any change in its speed.

21. greater22.A moving object will stay

moving until a force stops it. An object at rest will stay at rest until a force moves it. -Also called Newton’s 1st law of motion.

23. Forces that oppose motion between 2 surfaces that touch each other.

24. Walking vs. Walking on ice25. The force that every object

exerts on another object.26. The mass of the objects and

the distance between the objects.

27. more

28. decrease

29.The measure of the force of gravity on an object. (mass + force of gravity)

30. Newtons

31. 130lbs. X 0.04 = 5.2 or 5 lbs

32. 160 lbs. X 2.64 = 422.4 or 422 lbs.

33. 200 kg X 1.6 N/kg = 320 N

34. 220 lbs. / 2.2 = 100kg

100 kg X 3.7 N/kg = 370 N

35. 145 kg X 9.8 N/kg = 1421 N

36. d = s x t

6 km/hr X 2 hrs. = 12 km

37. t = d / s

30 m / 6 m/s = 5 sec.

38. a = V final – V initial

time

a = 70 m/s – 15 m/s

10 sec.

a = 55 m/s

10 sec.

a = 5.5 m/s2

39. a = V final – V initial

time

a = 10 m/s – 50 m/s

10 sec.

a = - 40 m/s

10 sec.

a = - 4 m/s2