8.6C Newton's Laws of Motion

An attempt is made to dislodge ketchup from the bottom of the ketchup bottle. The bottle is turned upside down, quickly pushed with a strong force in a downward motion, and then stopped. The ketchup immediately moves to the opposite end of the bottle. This scenario is an example of Newton's

• law of force and acceleration

• law of magnetism

• law of inertia

• law of gravity

Tags

NGSS.MS-PS2-1

Which statement best explains why the bulldozer will not move?

• The forces are unbalanced, so the bulldozer will not move

• The bulldozer's inertia requires more force to be exerted than the student can produce

• The action of the student is not equal to the reaction of the bulldozer

• The bulldozer's mass exerts a larger force on the student

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

According to Newton's law of action-reaction, what is most likely to occur if two ice skaters with approximately the same mass push away from one another?

• The skaters will move away from one another, but one will go farther than the other

• The skaters will not move because the net force will be 0 N

• The skaters will move away from one another at the same speed and go the same distance

• The skaters will move away from one another at different speed, but go the same distance

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NGSS.MS-PS2-1

Which of Newton's laws is best represented by the data in the table?

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

• Newton's law of friction

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NGSS.MS-PS2-1

Students conduct an investigation in which they create model rockets from film canisters, water, and Alka-Seltzer tablets. The students launch the rockets and make observations. Which explanation correctly identifies the action-reaction pairs?

• Water pushing up on the rocket and the rocket pushing down on the water

• Rocket pushing down on the gas from the reaction and the gas from the reaction pushing up on the rocket

• Rocket and gas from the reaction pushing up

• Alka-Seltzer tablet pushing down on the rocket and the rocket pushing up on the Alka-Seltzer tablet

Tags

NGSS.MS-PS2-1

The risk of injury in a car accident is much greater if occupants do not wear a seat belt. Which of Newton's laws explains why this is true?

• Law of inertia

• Law of force and acceleration

• Law of action-reaction

• Law of gravity

Tags

NGSS.HS-PS2-3

A student inflates a balloon attached to a plastic straw. A string is threaded through the straw and tied to opposite ends of the room. When the air in the balloon is released, the balloon travels the length of the string. Which of Newton's laws explains this phenomenon?

• Newton's law of magnetism

• The law of force and acceleration

• The law of action-reaction

• The law of gravity

Tags

NGSS.MS-PS2-1

If a 50-kilogram student is pushed in a rolling chair with a force of 20 N, what is the student's acceleration?

• 2.5 m/s²

• 4.0 m/s²

• 1,000 m/s²

• 0.40 m/s²

Tags

NGSS.MS-PS2-2

Bumper cars are a favorite ride at amusement parks. When bumper cars hit, a force is exerted on both cars, and they move in opposite directions. Even if a bumper car hits a car at rest, both cars move in opposite directions. These forces are an example of the law of

• unbalanced forces

• gravity

• force and acceleration

• action-reaction

Tags

NGSS.MS-PS2-1

A car driving down the road runs out of a gasoline. Which of Newton's laws explains why the car continues to move without gasoline?

• An object in motion stays in motion unless acted upon by an unbalanced force

• An object at rest stays at rest unless acted upon by an unbalanced force

• The greater the force applied, the greater the acceleration

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