Chapter 2 B Investigating Motion
- 1.The amount of matter in an object is its
- A.
Weight
- B.
Mass
- C.
Volume
- D.
Area
- 2.If a planet has more gravity than earth, its mass is
- A.
Less than earth's mass
- B.
The same as earth's mass
- C.
More than earth's mass
- 3.The farther away you get from earth, the less you feel the effect of its gravity.
- A.
True
- B.
False
- 4.What causes an object to accelerate as it approaches the earth?
- A.
Friction
- B.
Gravity
- 5.Acceleration occurs when an object
- A.
Goes faster
- B.
Slows down
- C.
Keeps a constant speed
- D.
Changes direction
- 6.Friction can be reduced by adding
- A.
Sand
- B.
Oil
- C.
Wax
- D.
Wheels
- 7.The force of friction moves in the same direction as the motion of an object.
- A.
True
- B.
False
- 8.The force that resists the movement of one surface past another surface is
- A.
Gravity
- B.
A push
- C.
A pull
- D.
Friction
- 9.Fingerprints help you pick up a glass by
- A.
Increasing friction between your skin and the glass
- B.
Decreasing friction between your skin and the glass
- 10.Friction caused by gas molecules in the atmosphere hitting an object and slowing it down is called
- A.
Streamlining
- B.
Air resistance
- 11.Some ways to streamline an object are to have
- A.
Rounded edges
- B.
less surface in the direction of motion
- C.
A large flat area in the front
- 12.A meteorite burns up as it enters our atmosphere because of friction.
- A.
True
- B.
False
- 13.What is the speed of a car that travels 120 miles in 4 hours?
- A.
60 miles per hour
- B.
30 kilometers per hour
- C.
30 miles per hour
- D.
60 kilometers per hour
- 14.Forces act in pairs.
- A.
True
- B.
False
- 15.The opposing force to an action force is
- A.
A reaction force
- B.
A reverse force
- 16.What makes an object move or stop?
- A.
Acceleration
- B.
Inertia
- C.
Force
- 17.When riding a skateboard, when you push your foot backwards against the floor, the skateboard
- A.
Moves backward
- B.
Moves forward
- C.
Stays in place
- 18.The tendency of an object to stay still if it is at rest or to keep moving if it is moving is called
- A.
Gravity
- B.
Air resistance
- C.
Inertia
- D.
Acceleration
- 19.If you run at a speed of 5 mph, how far would you run in 3 hours?
- A.
3 miles
- B.
15 miles
- C.
2 miles
- D.
8 miles
- 20.Changing direction when you are moving changes your
- A.
Speed
- B.
Time
- C.
Gravity
- D.
Velocity
- 21.The formula for speed is
- A.
Distance X time
- B.
Distance / time
- C.
Length X width
- 22.The force that allows a parachute to fall safely to the ground is
- A.
Gravity
- B.
Air resistance
- C.
Streamlining
- 23.Objects of different masses pull on each other equally, and the object with less mass
- A.
Moves toward the other object
- B.
Moves away from the other object
- C.
Stays still
- 24.An object's weight
- A.
Is the same wherever it is.
- B.
Changes when gravity changes.
- 25.If your mom puts her car on cruise control and travels at a constant speed of 65 mph, her acceleration is
- A.
Increasing
- B.
Decreasing
- C.
Zero
Questions: 10 | Attempts: 30358 | Last updated: Jan 16, 2022
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Sample QuestionA stone is thrown straight up. What is it's acceleration on the way up?
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