Force and Motion

Front

What is the force that pulls objects toward the center of the Earth?

Back

Gravity is the force that pulls objects toward the center of the Earth.

Front

Does an object with a lot of mass need more force or less force to be moved?

Back

An object with a lot of mass needs more force to be moved.

Front

What is the force that slows down the motion of an object or keeps it from starting?

Back

Friction is the force that slows down the motion of an object or keeps it from starting.

Front

What is the formula for calculating speed?

Back

Speed = distance / time.

Front

If a train travels 100 kilometers in 4 hours, what is its average speed?

Back

The average speed is 25 km/h.

Front

What are two examples of forces?

Back

A push or pull are two examples of forces.

Front

What is motion?

Back

Motion is the change in position of an object over time.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object.

Front

What is mass?

Back

Mass is the amount of matter in an object.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.