Newton's Laws STAAR

The reason a ball bounces up when it hits the ground:

• The ball and ground repel each other.

• The ball exerts a force on the ground, and the ground exerts a force on the ball.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Observe what happens to the motion of the penny. Which of Newton's Laws does this represent?

• Newton's 1st Law, inertia

• Newton's 2nd Law, Force = m x a

• Newton's 3rd Law, action/reaction

Answer explanation

Newton's 1st Law of inertia causes the penny to stay in place/drop straight down and enables me to catch it right where my elbow used to be.

Watch as Blake pushes the 2 cars of different masses with about the same force. Observe what happens. Which of Newton's Laws does this represent?

• Newton's 1st Law, inertia

• Newton's 2nd Law, Force = m x a

• Newton's 3rd Law, action/reaction

Answer explanation

Newton's 2nd Law is the relationship between force, mass and acceleration. The car with less mass travels further when pushed with the same force as the car with more mass.

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NGSS.MS-PS2-2

Watch as I send the car down the track. What happens as I increase the force that I am using? Which of Newton's Laws does this represent?

• Newton's 1st Law, inertia

• Newton's 2nd Law, Force = m x a

• Newton's 3rd Law, action/reaction

Answer explanation

The more force I apply, the greater the acceleration.

Tags

NGSS.MS-PS2-2

Watch as Blake begins to run. What happens to the sheets of paper under his feet? Why? Which of Newton's Laws does this represent?

• Newton's 1st Law, inertia

• Newton's 2nd Law, Force = m x a

• Newton's 3rd Law, action/reaction

Answer explanation

The action is Blake pushing off into the ground/paper to run. The reaction is the papper accelerating out the opposite direction!

Observe the motion of the washer as I quickly pull the card out from under it. What happened to the washer? Why? Which of Newton's Laws does this represent?

• Newton's 1st Law, inertia

• Newton's 2nd Law, Force = m x a

• Newton's 3rd Law, action/reaction

Answer explanation

Because the washer is at rest, it wants to stay at rest. no force is applied directly to the washer, so becuase of inertia, it stays on the table.

Which of Newton’s Laws explains a rocket’s movement during launch?

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

• Newton's Fourth Law of Motion

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NGSS.MS-PS2-2

A soccer ball is sitting in the middle of a field. The ball will remain at rest until an outside force like a players foot or the wind acts upon it. Which of Newton's laws is represented by this?

• 1st

• 2nd

• 3rd

Think about pushing a shopping cart and a car. If you apply the same amount of force to both, the shopping cart will travel fast, but the car will hardly move. To move the car yo would need a larger force. Which of Newton's laws is being represented?

• 1st

• 2nd

• 3rd

Tags

NGSS.MS-PS2-2

Sally jumps on her trampoline. She exerts a force on the trampoline and the trampoline exerts an equal but opposite force back on Sally. This represents

• Law 1

• Law 3

• Law 2

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NGSS.MS-PS2-1