Big Idea 13

Front

What causes magnets to repel each other?

Back

Like poles of magnets (N and N, S and S) repel each other.

Front

What is the reason a rope remains stationary when two people pull on it in opposite directions?

Back

The two forces are equal and balance each other out.

Front

What force causes objects to fall to the ground?

Back

Gravity.

Front

What surface can reduce the force of friction when moving an object?

Back

Thick carpet.

Front

How does mass affect the force required to push an object?

Back

The lesser the mass of the object, the less force required to push it.

Front

What is the definition of force in physics?

Back

A push or pull on an object that can cause it to accelerate.

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass.

Front

What is the principle of balance in forces?

Back

When two forces acting on an object are equal in size but opposite in direction, they balance each other out.

Front

What happens to an object in motion when no net force acts on it?

Back

It continues to move at a constant velocity.

Front

What is friction?

Back

A force that opposes the motion of an object.