Force and Friction

Front

What is a push or pull exerted on an object in order to change its motion?

Back

Force

Front

What is the force that opposes motion between two surfaces?

Back

Friction

Front

What type of forces do many objects around you exhibit when they do not move?

Back

Balanced forces

Front

How does the force of gravity change as mass increases and distance between objects increases?

Back

The force of gravity decreases as distance between objects increases.

Front

Is friction harmful, helpful, or both?

Back

Both harmful and helpful.

Front

What is the unit of force in the International System of Units (SI)?

Back

Newton (N)

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to accelerate or change its motion.

Front

What is static friction?

Back

The friction that prevents an object from starting to move.

Front

What is kinetic friction?

Back

The friction that opposes the motion of an object that is already moving.

Front

What happens to the frictional force when the surface area of contact increases?

Back

The frictional force does not significantly change with surface area; it depends more on the nature of the surfaces and the normal force.