Newton's Laws and Forces of Motion

The mass of an object always stays the same, but its weight can change.

• True

• False

On Earth, all objects fall at the same rate.

• True

• False

Newton's First Law states:

• Acceleration depends on the mass of an object and the force acting on it.

• An object at rest stays at rest, and object in motion stays in motion unless it is affected by an outside force.

• For every action there is an equal and opposite reaction.

• Forces always come in pairs.

Newton's Second Law states:

• Acceleration depends on the mass of an object and the force acting on it.

• An object at rest stays at rest, an object in motion stays in motion unless it is affected by a force.

• For every action there is an equal and opposite reaction.

• Forces always come in pairs.

Newton's Third Law states:

• Acceleration depends on the mass of an object and the force acting on it.

• An object at rest stays at rest, an object in motion stays in motion unless acted upon by an outside force.

• For every action force, their is an equal and opposite reaction force.

• Forces always come in pairs.

The formula for Newton's Second Law is...

• Acceleration= mass x force

• force= mass x acceleration

• mass= force x acceleration

Gravity acts on _______ objects.

• Heavy

• Light

• All

• Most

Which of the following is the equation for average speed?

• speed= Time x time

• speed= distance / time

• speed= distance x time

Gravity and Friction are examples of...

• balances

• forces

• laws

• movements

What effect does friction have on a moving object?

• gives it positive acceleration

• speeds it up

• gives it inertia

• slows it down