Why might a box be difficult to push across the floor?
A. the box has too little mass
B. the box has too little friction
C. the box has a lot of mass
D. the box doesn’t want to move
The box has a lot of mass
100
What force must a rocket act against as it moves away from Earth?
A. inertia
B. gravity
C. magnetism
D. momentum
Gravity
100
A runner traveled 6 miles in the 1st hour and 8 miles in the 2nd. Describe her motion.
A. speeding up
B. slowing down
C. changing direction
D. stays the same
Speeding Up
100
What will most likely happen if you push harder while skating in a straight line?
A. You will turn
B. You will stop
C. You will go slower
D. You will go faster
You will go faster
200
__________ is the change in velocity over time for an object
Acceleration
200
Why would the flag stay in place if 2 teams were pulling in opposite directions at tug-o-war?
the forces are balanced
200
Which describes the role of friction in the operation of a car?
A. Friction makes a car go faster.
B. Friction keeps a car from stopping.
C. Friction turns the car in a new direction.
D. Friction helps a car slow down and stop
D. Friction helps a car slow down and stop
200
What kind of force do brakes use to stop a moving bicycle?
A. gravity
B. friction
C. magnetic
D. push
Friction
200
What will happen if you’re in a car, and the driver slams on the brake?
A. You will stop moving
B. You will continue to move forward
C. You will gradually slow down
D. You will speed up
B. You will continue to move forward
300
A _______ is any push or pull from one object to another.
force
300
What causes an increase in speed?
A. greater mass
B. greater incline
C. greater friction
D. greater force
Greater Force
300
What force attracts iron objects?
Magnetism
300
What information is needed to calculate speed?
A. distance and time
B. distance and type of object
C. distance and height of object
D. distance and weight of object
distance and time
300
Jack and the chair are exerting the same amount of force. What will happen to the chair?
A.It will move backward.
B. It will move forward.
C. It will move left.
D. It will stay still.
It will stay still
400
_________ is a force that opposes the motion of one object moving past another.
Friction
400
If two different balls are kicked with the same force, which ball will go the farthest?
A. ball with the smaller mass
B. ball with the greater mass
C. ball with the greater friction
D.ball with the smaller diameter
The ball with the smaller mass
400
An object is traveling at a steady speed in a straight line. What will make it change direction
A. change in the mass of the object
B. change in the shape of the object
C. balanced force acting on the object
D. unbalanced force acting on the object
D. unbalanced force acting on the object
400
Which is a force that keeps the planets in orbit around the Earth?
A. inertia
B. gravity
C. magnetism
D. solar energy
Gravity
400
What causes a ball rolling across a rug to slow to a stop?
AThe rug doesn’t have enough force to hold the ball
B. The ball isn’t moving fast enough
C. The rug doesn’t have enough momentum to keep the ball moving
D. Friction resists the ball’s forward motion
D. Friction resists the ball’s forward motion
500
___________ is the force for of attraction between two objects
Gravity
500
What is the best example of a pushing force that reduces the speed of an object?
A. a bat hitting a baseball
B. a brake rubbing against a wheel
C. a pedal turning the wheels of a bicycle
D. a skateboard wheel rolling against pavement
a brake rubbing against a wheel
500
Darryl pushed a toy car across a floor. It went fast on the wood but slow on the carpet. Why?
A. inertia decreased
B. Gravity increased
C. Friction increased
D. Magnetism decreased
C. Friction increased
500
Which is the best explanation of why the Moon revolves around Earth?
A. The Moon has a thinner atmosphere than Earth
B. The Moon is too large to move away from Earth.
C. The Moon is attracted by the gravity of Earth.
D. The Moon has a smaller gravitational force than Earth.
C. The Moon is attracted by the gravity of Earth.
500
When using magnets, if the same poles are facing another, they will ________. If different poles are facing another, they will ______________.