Download Chapter 4 Motion

Chapter 4 Review
and Test Preparation
Vocabulary Review
Use the terms below to complete the sentences. The page numbers tell you where to
look in the chapter if you need help.
speed p. 146
velocity p. 146
acceleration p. 148
inertia p. 155
1. The speed and direction of a moving object is its ____.
2. The distance an object travels in a certain amount of time is its ____.
3. The rate of change of velocity over time is ____.
4. The tendency of an object to maintain its state of motion is ____.
Check Understanding
Write the letter of the best choice.
5. When a boy lands on a trampoline, he pushes the trampoline. What is the reaction
force?
A. gravity pulling the boy down
B. the boy pushing down
C. the friction between the boy and the trampoline
D. the trampoline pushing upward
6. The diagram shows a force acting on an object. What is the direction of the object's
acceleration?
F. opposite to the force
G. in the same direction as the force
H. at right angles to the force
J. in any direction
7. What force helps you stop when you're skateboarding?
A. friction
B. gravity
C. inertia
D. magnetism
8. A worm crawls 2 meters in 2 hours. What is the worm's speed?
F. 1 m/hr
G. 2 m/hr
H. 4 m/hr
J. 10 m/hr
9. Which of the following is not part of Newton's second law?
A. mass
B. position
C. acceleration
D. force
10. A girl ice-skates in a circle at a constant speed of 10 km/hr. What part of her
motion is changing?
F. acceleration
G. friction
H. speed
J. velocity
11. Which of the following does not cause a car to accelerate?
A. steering wheel
B. gas pedal
C. tires
D. brakes
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12. If you were a bicycle racer, what feature would you look for in a bike?
F. large tires
G. tires with high friction
H. low mass
J. high mass
13. A balloon rises at a rate of 2 km/hr. What is its velocity?
A. 2 mi/hr, upward
B. 2 km/hr, upward
C. 2 km/s2
D. 2 km/hr
14. CAUSE AND EFFECT If you walk on a 0 log floating in water, the log moves
backward. Which of the following explains this?
F. Newton's first law
G. Newton's second law
H. Newton's third law
J. friction
15. A truck, a car, a motorcycle, and a train are all moving at the same speed. Which
has the most momentum?
A. car
B. motorcycle
C. train
D. truck
16. MAIN IDEA AND DETAILS Which two 0 factors make up momentum?
F. mass and velocity
G. force and mass
H. mass and acceleration
J. velocity and gravity
Inquiry Skills
17. Pluto is the smallest planet in the solar system. Infer whether you would feel
lighter or heavier on Pluto than on Earth. Explain why.
18. How can a race-car driver keep the same engine (the force) but increase the
acceleration of the car? Identify the control variable and the test variable.
Critical Thinking
19. Look at the diagrams. For each one, state the reaction force.
--- see diagrams
20. Part A A cyclist travels at 40 km/hr going north. Another cyclist travels at 40
km/hr going south. Are the cyclists traveling at the same speed? The same
velocity? Explain.
Part B In what ways can the cyclists change their velocities? Name as many as
you can.
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