Newton's Laws (STAAR Level)

A girl is standing on a skateboard and facing east. If she bends her knees and jumps off the skateboard in the direction she is facing, which direction will the skateboard move?

• North

• South

• East

• West

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Why does a skateboard move if you jump off of the front of it?

• The law of action-reaction will cause the skateboard to move in the opposite direction of the jump.

• The law of action-reaction will cause the skateboard to move in the same direction as the jump.

• The law of gravity will force the skateboard to move south after the jump

• The law of gravity will cause the skateboard to move in the opposite direction of the jump.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In an investigation over force, mass, and acceleration, five different students lined up behind five different objects. Each student pushed their assigned object with the same amount of force as the other students. The distance traveled by each object is listed in the table.

If the objects are all pushed with the same amount of force, place them in order of greatest mass to least mass.

• Object 4

• Object 5

• Object 3

• Object 2

• Object 1

Tags

NGSS.MS-PS2-2

In 1687, Isaac Newton published a book discussing the three laws of motion that he had discovered. The third law of motion is known as the law of action-reaction. Which of the following situations are examples of Newton's third law of motion? Select TWO correct answers.

• A person pushes on the water with a paddle while the paddle pushes back on the person's hand.

• A baseball bat pushes on a ball while the ball pushes back on the baseball bat.

• A gymnast pushes down on a balance beam with her feet and the balance beam pushes down on the ground.

• A person pushes down on a trampoline and the trampoline pushes back on the person.

• A skateboarder pushes on the skateboard while the wheels of the skateboard push on the ground.

Tags

NGSS.MS-PS2-1

Complete the statement below.

Mr. Robbins is taking his baby for a walk in a stroller. The amount of force that Mr. Robbins must use to make the stroller move MOST likely depends on the stroller's ​ (a)  

• mass
• direction
• distance
• velocity

Tags

NGSS.MS-PS2-2

Stephanie is in volleyball practices and she notices something interesting about the effect that spiking the ball has on her hand. She notices that the harder she hits the ball, the more that her hand hurts afterward. Which Newton's Law explains why this happens?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's Laws do not explain this.

Tags

NGSS.MS-PS2-2

Jonas and his family are moving to another part of the city. As Jonas, his brother, and his Dad were driving one of the trucks filled with furniture to their new home, the truck ran out of gas. A gas station is 0.5 miles down the road. The three of them decide they need to somehow get the truck to the gas station to get gas. Jonas tries pushing the truck, but can not make it move. Which of the following would NOT be a solution to help get the truck to the gas station?

• Unload the furniture out of the truck. With less mass, they should be able to push the truck to the gas station.

• Jonas and his brother push the truck. With more force, they should be able to push the truck to the gas station.

• Jonas’ brother gets out of the cab of the truck and sits in the back of the truck with the furniture. With less mass, they should be able to push the truck to the gas station.

• Unload half the furniture out of the truck and let Jonas and his brother push. With less mass and more force, they should be able to push the truck to the gas station.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The picture illustrates the horizontal forces acting on a car. The car’s engine force pushes forward, while friction between the tires and the road, along with wind resistance drag at the car in the backwards direction. Which of the following must be true about these forces if the car is driving forward on a level road at a constant speed of 45 miles per hour?

• The force of the engine forward must be greater than the force of gravity acting on the car.

• The force of the engine forward must be greater than the combined forces of friction backward.

• The force of the engine forward must be less than the combined forces of friction backward.

• The force of the engine forward must be equal to the combined resistance forces.

Tags

NGSS.MS-PS2-2

According to Newton’s First Law (the Law of Inertia)—

• when you lean back against a chair, the chair pushes back against your back.

• when you kick a soccer ball, the ball pushes back against your foot.

• when you push a shopping cart that is still, it rolls forward.

• when you hit a baseball, the bat can vibrate and hurt your hands

While in outer space a rocket engine is able to produce thrust on a spacecraft. Identify the correct action-reaction pair which allows the spacecraft to propel itself upward.

• rocket engine-spacecraft

• rocket engine nozzle-exhaust gasses

• exhaust gasses-air behind the spacecraft

• exhaust gasses-ground

Tags

NGSS.HS-PS2-1