Newton's Laws of Motion

Which of Newton's Laws of motion best explains why motorists should buckle up?

• 1st law of motion

• 2nd law of motion

• 3rd law of motion

• Uniform circular motion

If you blow up a balloon and then release it, the balloon will fly away. Which of the following laws of motion governs this situation?

• 1st law of motion

• 2nd law of motion

• 3rd law of motion

• Uniform circular motion

Forces come in ___________ ___________ force pairs.

• action, reaction

• acting lessons

• action, cut

• chemical reaction

When a hammer exerts a force on the nail, the nail _________________________________________.

• exerts a smaller amount of force back onto the hammer

• exerts a larger amount of force back onto the hammer

• exerts the same amount of force back onto the hammer

• cries and cries and cries

The nozzle of a rocket is pointed downward so that as fuel is ignited, the exhaust pushes downward. Why is this arrangement necessary for a rocket to function properly?

• The rocket is protected from the heat of the exhaust.

• Burned fuel can be collected on the ground.

• As fuel is combusted, the rocket pushes the gases backward and the gases push the rocket forward.

• This allows the rocket to be steered properly.

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backward because -

• the mass of the skateboard is the same as the mass of the person jumping off.

• the pull of gravity on the person is the same as on the skateboard, regardless of size.

• the air resistance on the person is great and the friction on the skateboard is small.

• for the force that sent the person forward, there is an equal force pushing back on the skateboard.

A ball bat hits aball with a force of 100 Newtons. What is the force and direction exerted by the ball on the bat?

• 100 Newtons, same direction

• 100 Newtons, opposite direction

• 200 Newtons, same direction

• 200 Newtons, opposite direction

Because of inertia, a resting object ________.

• will remain at rest

• will move at a constant speed

• will eventually move

• is unbalanced

The first law of motion states that objects in motion will:

• stop

• accelerate

• stay in motion

• rest

The first law of motion states that objects at rest will stay at rest unless acted upon by an unbalanced:

• motion

• force

• inertia

• acceleration