Force and Motion - 3rd Grade

Front

What is a push in terms of force?

Back

A push is a force that moves an object away from the source of the force.

Front

What is gravity?

Back

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

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to change its motion, either by starting to move, stopping, or changing direction.

Front

What does it mean when we say an object will not move unless a force acts on it?

Back

It means that an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an external force.

Front

What is a balanced force?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.

Front

Give an example of a situation with balanced forces.

Back

A book resting on a table is an example of balanced forces; the force of gravity pulling it down is balanced by the normal force of the table pushing it up.

Front

What is the effect of unbalanced forces on an object?

Back

Unbalanced forces cause an object to accelerate, change direction, or change its state of motion.

Front

What is the role of friction in motion?

Back

Friction is a force that opposes the motion of an object, acting in the opposite direction to the movement.

Front

How does mass affect the force of gravity on an object?

Back

The force of gravity increases with the mass of the object; heavier objects experience a stronger gravitational pull.

Front

What is inertia?

Back

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