True/False: When no net force is applied to a moving object, it still comes to rest because of its inertia.

• True

• False

Answer explanation

Newton's 1st Law: An object in motion stays in motion UNLESS acted upon by a unbalanced force.

True/False: When an object is stationary, all of the forces acting on it are balanced.

• True

• False

Answer explanation

Newton's 1st Law: A object at rest stays at rest unless acted on by an UNBALANCED force

Which of the following statements does not describe force?

• Force causes objects to start moving.

• Force causes objects to move faster.

• Force causes objects to stop moving.

• Force causes objects at rest to remain stationary.

Answer explanation

Newton's 1st law: An object at rest says at rest UNLESS acted on by a force...

Forces that cancel each other out are called ____ forces.

• inactivated

• unbalanced

• null

• balanced

Answer explanation

Balanced forces are equal and opposite on the same object

Newton's 1st Law of Motion states that ____.

• when a force is applied on an object, there is an equal force applied by the object in the opposite direction

• for every action, there is an equal but opposite reaction

• an object will remain at rest or keep moving with a constant velocity unless a force acts on it

• acceleration is calculated by dividing the force exerted on an object by the mass of the object

____ is a force that resists motion between two surfaces that are in contact.

• Gravity

• Inertia

• Friction

• Acceleration

When balanced forces act on an object, the net force is ____.

• negative

• not enough information

• zero

• positive

What causes a falling skydiver to slow down after the parachute opens?

• gravity

• loss of inertia

• reference motion

• air resistance

A(n) ____ is a push or pull.

• velocity

• force

• inertia

• motion

The ____ is the combination of all the forces acting on an object.

• net force

• inertia

• direction of motion

• mass