Newton's 1st and 2nd Laws

In the absence of a net force, a moving object will ____.

• slow down and eventually stop

• speed up faster and faster

• stop immediately

• move with a constant velocity

Newton's 1st Law is also called the Law of ____.

• Weight

• Inertia

• Constant Velocity

• Apples

Wearing a seat belt is a direct application of Newton's ____ Law.

• 1st

• 2nd

• 3rd

• 4th

When the rocket engines on a spacecraft are turned off while traveling in empty space, the spacecraft will ____.

• stop immediately

• slow down and eventually stop

• go faster and faster

• move with a constant velocity

What happens to your weight if you were to go to the moon? Mass?

• Weight stays the same, mass increases.

• Weight stays the same, mass decreases.

• Mass stays the same, weight increases.

• Mass stays the same, weight decreases.

A force of 10 N is applied to both a golf ball and a bowling ball. Which ball experiences the greater acceleration?

• bowling ball

• golf ball

• neither, they will have the same acceleration

A box with a mass of 10 kg is pushed across the floor by a force of 20 N. If the force of kinetic friction on the box is equal to 5 N, what acceleration will the box experience?

• 2.5 m/s²

• 1.5 m/s²

• 250 m/s²

• 150 m/s²

A force is applied to move a desk. The desk has a mass of 10 kg and accelerates at +2 m/s² after a force of friction of 15 N is applied. What force is the desk being pushed with?

• +5 N

• -5 N

• +35 N

• -35 N

A net force of 345 N accelerates a boy on a sled at 3.2 m/s². What is the combined mass of the boy and sled?

• 1,104 N

• 107.8 N

• 1,104 kg

• 107.8 kg

A wooden pallet carrying 600 kg is pushed with a force of 1650 N by a crane. If the force of friction acting between the ground and the pallet is 1000 N, how fast will the pallet be moving after 5 seconds?

• 1.1 m/s

• 0.22 m/s

• 5.5 m/s

• 8.33 m/s