Force and Motion

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that cause an object to move or change its motion. They are not equal in size and opposite in direction.

Front

What are balanced forces?

Back

Balanced forces are forces that are equal in size and opposite in direction. They do not cause a change in motion.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces rub against each other.

Front

What is gravity?

Back

Gravity is a force that pulls objects toward each other. It keeps us on the ground and causes objects to fall.

Front

How does friction affect motion?

Back

Friction can slow down or stop the motion of an object. More friction means less motion.

Front

What happens when a soccer ball is kicked?

Back

When a soccer ball is kicked, an unbalanced force is applied, causing the ball to move.

Front

Why does a ball roll down a hill?

Back

A ball rolls down a hill because of gravity, which pulls it downward.

Front

What is an example of an advantage of low friction?

Back

An advantage of low friction is that it allows ice skaters to glide smoothly and quickly on the ice.

Front

What is an example of balanced forces in action?

Back

An example of balanced forces is when a dog pulls on a leash while a boy pulls back, and neither moves.

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to accelerate, change direction, or change speed.