Newton's Laws Lesson

Jessica is comparing two balls. One has a mass of 1kg, and the other has a mass of 2kg. She pushes each with a force of 100N. How do the accelerations of the two balls compare?

• The 1kg ball accelerates the same as the 2kg ball.

• The 1kg ball accelerates half as much as the 2kg ball.

• The 1kg ball accelerates twice as much as the 2kg ball.

• The 1kg ball accelerates four times as much as the 2kg ball.

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NGSS.MS-PS2-2

A fisherman steps off a boat, which is in the water, onto a dock. What happens?

• The boat and dock do not move.

• The boat moves toward the dock.

• The boat moves away from the dock.

• The dock moves away from the boat.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Look at the diagram of forces acting on an object. The picture shows a push and a pull acting on a box of books sitting on the floor. What is the net force toward the right on the box?

• 0N

• 50N

• 100N

• 200N

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NGSS.MS-PS2-2

A car accelerates from 5 m/s to 27 m/s in 10 seconds. What is the acceleration in m/s^2?

• 2.2

• 2.7

• 3.2

• 27

An airplane is traveling at a speed of 200 m/s relative to the Earth. A person walks toward the front of the plane at a speed of 1 m/s. How fast is that person traveling in reference to the other people on the airplane?

• 0 m/s

• 1 m/s

• 200 m/s

• 201 m/s

Carts A and B each have the same force applied to them. Cart A has half the mass of Cart B. How does Newton's first law of motion predict the resulting accelerations of the carts?

• Cart A will have the greater acceleration.

• Cart B will have the greater acceleration.

• Carts A and B will have the same acceleration.

• The law cannot predict the acceleration without additional information.

Tags

NGSS.MS-PS2-2

How are velocity and speed related to each other?

• Speed and velocity are both only a change in position over time.

• Velocity and speed both include the direction and a change in position over time.

• Speed includes the direction and change in position over time, but velocity is only a change in position over time.

• Velocity includes the direction and change in position over time, but speed is only a change in position over time.