Work and Energy

When a weight-lifter squats 100 pounds and stands up, what should you use to show the direction of movement and force in a diagram?

• Colors

• Arrows

• Numbers

• Letters

Does a person do work on weights when lifting them up?

• Yes

• No

• Only if the weights are heavy

• Only if the person is running

What should you label in your model when showing the movement of weights?

• The color of the weights

• The direction of movement and force

• The size of the weights

• The time of day

What does the diagram of the man lifting weights help to illustrate?

• The direction of force and movement during lifting

• The type of shoes the man is wearing

• The color of the weights

• The number of people in the gym

When wind blows paper along the ground, what does this scenario demonstrate?

• Transfer of energy from wind to paper

• Transfer of energy from the ground to paper

• Transfer of energy from paper to wind

• Sound waves traveling

Does the energy of paper change after wind moves it? How do you know?

• Yes, because the paper starts moving

• No, because the paper stays still

• Yes, because the paper changes color

• No, because the wind stops blowing

Four students are each pushing on one side of a box. Mara is pushing to the west, Cindi is pushing to the east, Chris is pushing to the north, and Sammy is pushing to the south. If the box moves to the east, which student does work on the box?

• Cindi

• Mara

• Sammy

• Chris

Tags

NGSS.MS-PS2-2

Colin is helping a librarian return books to the shelves where they belong. He picks up books from the librarian’s desk, as shown in Figure A. He then carries them to the shelves, as shown in Figure B.

In which figure does Colin do work?

• Figure A

• Figure B

• Both Figures

• Neither Figure

Deanna pushes her on the swing. Deanna must exert ________ to cause the swing to move.  

• work

• force

• Newton

• friction

Tags

NGSS.MS-PS2-1

By Deanna pushing her niece on the swing, this causes the swing to go into ______   which causes the swing to change its position.

• Work

• Energy

• Newton

• Motion

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2