Unit 5 force and motion

 A car and a truck move on Interstate 40 in the same direction at the same speed. Both vehicles slow down with the same stopping force.

Which statement best explains why the truck will need more distance than the car to stop?

• The truck has a larger engine than the car.

• The truck has larger wheels than the car.

• The truck is longer than the car.

• The truck has more mass (weight) than the car.

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NGSS.MS-PS2-2

A pencil rolled to the edge of the table then fell to the floor. Which force pulled the pencil toward the ground?

• speed

• gravity

• friction

• mass (weight)

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NGSS.MS-PS2-4

Luis and Max left their school at 2:45 p.m. to go to the library. Luis rides his bike at a speed of 10 miles per hour. Max rides his bike at a speed of 12 miles per hour. Which of the following is most likely to happen?

• A. Luis and Max will arrive at the library at the same time.

• Luis will arrive at the library before Max.

• Max will arrive at the library before Luis.

• Luis and Max will ride their bikes in two different directions.

Which of the following statements best explains why it can be dangerous to drive a car on an icy road in the winter?

• Ice increases the force of gravity acting on a car.

•  Ice increases the mass (weight) of a car.

• Ice reduces the friction between the car’s tires and the road.

• Ice reduces the speed of the car.

A biologist observes a bat in motion. The bat flies a distance of 2 miles. If the biologist wants to determine the bat’s speed, what other information

does she need?

• She needs to know the amount of time the bat flies.

• She needs to know the direction the bat flies.

• She needs to know the bat’s starting position.

• She needs to know the bat’s mass while it is flying.

The picture shows water flowing down the side of a mountain. Which of the following causes water to flow down the sides of mountains and hills?

• friction

• speed

• direction

• gravity

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NGSS.MS-PS2-4

NGSS.MS-ESS2-4

Reece rolls a ball down a smooth, wooden ramp and observes the motion of the ball. Then he places sandpaper on the ramp. Next, he rolls the same ball down the ramp covered with sandpaper and observes the motion of the ball. What is Reece most likely investigating?

• He is investigating if a change in gravity affects the motion of the ball.

• He is investigating if a change in friction affects the motion of the ball.

• He is investigating if a change in mass affects the motion of the ball.

• He is investigating if a change in direction affects the motion of the

  ball.

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NGSS.MS-PS2-2

How should you label the X axis of a graph?

• friction

• mass

• force

• time

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NGSS.MS-PS3-1

Which of the following is the best choice for you to label the Y axis of the graph?

• distance

• change in mass

• gravity

• force

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NGSS.MS-PS3-1

Suppose it takes more force to push Box A across the floor than Box B. Which of the following is most likely true?

• Box A has the same mass (weight) as Box B.

• Box A has less mass (weight) than Box B.

• Box A has more mass (weight) than Box B.

• Box A and Box B have no mass (weight).

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NGSS.MS-PS2-2