Unit 5 Review

Four students were asked to classify the activities of the people in the picture below as examples

of either potential or kinetic energy. Which student correctly classified the activities?

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NGSS.MS-PS3-1

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2. One way to experience kinetic and potential energy is to go to an amusement park and ride a roller coaster, like the one shown in the diagram below. At which point does the rider experience the greatest amount of gravitational potential energy?

• A. W

• B. X

• C. Y

• D. Z

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NGSS.MS-PS3-2

3. Look at the roller coaster diagram above. At which point on the roller coaster will the car have the greatest amount of kinetic energy?

• W

• x

• Y

• Z

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NGSS.MS-PS3-1

Fill in the blank. Word Bank: kinetic, potential, increases, decreases.

4.Students are investigating changes in potential and kinetic energy by making a ramp with a plastic ruler propped up on a book and rolling a marble down the ramp. Explain the changes in potential and kinetic energy of the marble as its position on the ruler changes. At the top of the ruler, the _________ energy of the marble is at its highest. As the marble rolls, ​​​the potential energy of the marble _________ as its kinetic energy _________.

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NGSS.MS-PS3-2

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5.In the picture on the right, the students aren’t moving because

• They aren’t strong enough

• The forces on the rope are balanced

• The forces on the rope are unbalanced

• The students aren’t pulling hard enough

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NGSS.3-PS2-1

6.Use the diagram below and your knowledge of science to answer the next two questions.

Which cart has balanced forces acting upon it that results in no movement?

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7. Which cart with unbalanced forces acting upon it will most likely result in movement to the right?

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NGSS.MS-PS2-2

An image of a toy rocket and forces are shown below. Assuming the only two forces on the toy rocket are lift and gravity, which of the following combinations would result in the rocket moving upward?

• A. Lift = 5 Newtons / Gravity = 5 Newtons

• B. Lift = 3 Newtons / Gravity = 4 Newtons

• C. Lift = 5 Newtons / Gravity = 4 Newtons

• D. Lift = 4 Newtons / Gravity = 4 Newtons

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NGSS.MS-PS2-2

A toy car rolls 8 meters in 2 seconds. What is the average speed of the toy car?

• A. 16 m/s

• B.10 m/s

• C. 6 m/s

• D. 4 m/s

10.Students begin to measure the speed of a ball rolling down a ramp. The graph below shows their results.

What is the average speed of the ball?

• A. 4 m/s

• B. 5 m/s

• C. 14 m/s

• D. 20 m/s

Tags

NGSS.MS-PS3-1