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The force that pulls any two objects toward each other is                .
1. gravity
2. length
3. volume
4. weight
Motion is
1. the push or pull of an object.
2. a force that works against motion.
3. a model built by an engineer.
4. when an object changes position.
Force is
1. the push or pull on an object.
2. when an object changes position.
3. a model built by an engineer.
4. a force that works against motion.
A space shuttle started launching into space. It used a lot of force to fly up toward space. In which direction was the opposite force going?
1. up
2. down
3. left
4. right
A force that resists motion created by objects rubbing together is                .
1. gravity
2. friction
3. speed
4. force
The rate of change in distance an object travels in a given time describes its                   .
1. position
2. speed
3. frame of reference
4. energy
Name an invisible force.
1. Gravity
2. Friction
3. Air resistance
4. All of the above
Term that describes a certain place.
1. position
2. motion
3. friction
4. force
A roller coaster car goes up and down because it is moved by                .
1. force
2. gravity
3. inertia
4. friction
Which of the following is caused by the energy of motion?
1. resistor
2. friction
3. conductor
4. filament
A measure of the pull of gravity on objects.
1. gravity
2. volume
3. weight
You can change the position or direction of motion of an object by pushing it or pulling it.
1. True
2. False
Which is a term for a change in an object's position over time?
1. Position
2. Motion
3. Sir Isaac Newton
4. Potential Energy
What determines how much something weighs?
1. pull of gravity
2. amount of mass
3. where it stays on Earth
4. none of these
The idea that an object in motion will stay in motion unless an unbalanced force acts upon it.
1. work
2. inertia
3. gravity
4. kinetic energy
Another name for energy of motion is                   .
1. frame of reference
2. potential energy
3. relative motion
4. kinetic energy
Can objects be the same size, but weigh differently?
1. Yes
2. No
The force of gravity is what pulls a roller coaster car to Earth.
1. True
2. False