Download Unit 4 SG

Name ____________________________
Date _________
Period ___
MOTION1212FORCE1212ENERGY
STUDY GUIDE
TERM
Speed
Velocity
Acceleration
Force
Weight
Momentum
G. Potential Energy
Kinetic Energy
Mechanical Energy
Work
Power
(MOTION)
UNITS
EQUATION
Chapter 2 (Know pg 834 11-24))
1. Compare speed and velocity:
2. If a turtle crawls 10 meters in 2 minutes from the couch to the kitchen. What is
its speed?
What is its velocity?
3. In constant velocity, what is the acceleration?
4. On a distance versus time graph, if the slope is 0, what is occurring?
5. Draw a velocity versus time graph showing the following:
A zebra moves from rest to a constant speed of 2 m/s for 2 seconds, then it
stops for 4 seconds to drink water, and then takes off running at 4 m/s for 2
seconds.
6. A rabbit runs out its hole at 0.8 m/s over to the riverbed which takes 30
seconds. What is the rabbit’s acceleration?
7. On a velocity versus time graph, if the slope is 0, what is occurring?
8. Momentum is mass times velocity. Explain how a large bus traveling
slowly can have the same momentum as a small car going fast.
9. If you are on a train that is traveling at a speed of 100 km/hr. How long
will it take to travel 800 km?
10. It takes one minute to go from rest to 38 m/s. What is the acceleration of
the car?
11. Why do streets and highways have speed limits, but not velocity limits?
12. What is Net Force:
13. What is the acceleration of balanced forces?
14. The downward force of gravity is 5 N and the upward force of air
resistance is 4 N, what is the Net Force?
15. If the speedometer on a car indicates a constant speed, can you be sure
the car it is NOT accelerating?
(FORcE)
Chapter 3 (pg 834 25-37)
16. Force causes acceleration or change an objects velocity. Why do
balanced forces not affect motion while unbalanced forces cause the
change?
17. What is the difference between weight and mass?
18. Define Friction?
19. Why is air resistance a form of friction?
19. Explain two factors affecting gravity?
20. What is the acceleration rate for Gravity?
21. A person in an elevator that moves downward with an acceleration of 2
m/s2. If the person weighs 580 N, what is the next force?
22. What is the weight of a person with a mass of 80 kg?
NEWTONS LAWS
1st
EXPLAINATION
2nd
3rd
23. What is Terminal Velocity:
24. Describe Centripetal Acceleration:
25. Two balls are at the same height. One ball is dropped and the other
initially moves horizontally. After one second, which ball has fallen the
greatest distance?
26. Which of Newton’s laws are exhibited in the use of seat belts?
27. You are pushing a 30 kg. wooden crate across the floor. The force of
sliding friction on the crate is 90 N. How much force must you exert on
the crate to keep it moving with a constant velocity?
28. What is the measurement for Force? What are the components for
Force?
29. Explain why all objects have the same free fall acceleration.
30. Why do astronauts experience apparent weightlessness?
(ENERGY)
Chapter 4
(pg 834 38-50)
31. What are the two components that make up the scientific definition of
Work?
32. What is Work?
33. Explain the difference between Work and Power?
34. What is Kinetic Energy:
35. What is Potential Energy:
Name and explain the three main types:
1.)
2.)
3.)
36. Law of Conservation of Energy is:
37. If you have a mass a 60 kg and you are standing on a platform 3 m
above the ground, what is your gravitational potential energy?
38. A system has a total mechanical energy of 500 J, the Kinetic Energy
was 220 J, what is the potential energy?
39. If your weight is 500 N, and you are standing on a floor that is 20 m
above the ground, what is your gravitational potential energy?
40. How much work is needed to lift a 5000 g weight to a shelf 3 m. above
the floor?
41. Draw a rollercoaster and label the point of highest GPE and highest
KE:
(PRACTICE PROBLEMS)
A 200 gram grasshopper jumps 2 meters at 0.5 meters in height at a speed of
0.8 m/s.
TERM
GPE
KE
Mechanical Energy
Acceleration
Momentum
Force
Weight of Grasshopper
Work
Power
Answer
Draw a free body of the grasshopper: Label at the forces present?
List all the energy transformations that are occurring:
If a 80kg gorilla has a momentum of 60 kg m/s towards the large monkey tree.
What is his Kinetic Energy?
A 80 kg panda is sitting 5 meters from the top of a 15 meter tall tree:
What is its mechanical energy?
The 80 kg panda jumps down from the tree.
What is its Force?
What is its Work?
A 250 kg. car goes up a 10 meter tall hill and then is put in neutral (regardless of
energy lost to thermal, sound, and light).
What is the momentum of the car at the bottom of the hill?
What is the Power of the rollercoaster at the bottom of the hill?