Energy,Force and Motion

Two girls are pulling on opposite ends of a thick rope. Both girls pull on the rope with the same force but in opposite directions. If both girls continue to pull with the same force, what will most likely happen? 

• One girl will pull the other toward her.
• Both girls will stay in the same place. 
• Gravity will cause the rope to sag. 
• The rope will break.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Choose the words that correctly complete the paragraph.

Deanna’s niece loves to swing at the local playground, so Deanna takes her and pushes her on the swing. Deanna must use ____________to exert a ____________ that causes the swing to change ____________.

• force, energy, motion

• motion, force, energy

• energy, force, motion

Tags

NGSS.MS-PS2-2

Marissa uses a cart to haul flowers at her job with a landscaper. She pushes a 12-kilogram cart a distance of 6 meters with a force of 25 Newtons. How much work does she do?

• 4.25 J

• 150 J

• 150m

• 1800 J

Tags

NGSS.MS-PS2-2

Raul dug a hole in his yard to repair a water pipe. It took him 2 seconds to apply a force of 50 Newtons to push the shovel 0.25 m into the ground. How much power was used?

• 0.01 watts

• 6.25 watts

• 25.00 N•m•s

• 100.00 watts

The rate at which work is done is:

• energy

• power

• motion

• work

Colin is helping the 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 Figure A and B

• Neither Figure A or B

For work to be done, the force and motion must:

• be going in different directions

• be the same

• be moving in the same direction

• have a net force of 0 N

Tags

NGSS.HS-PS2-1

The amount of work you do on something depends on the ___________ of the force and the object's _____________.

• speed, motion

• motion, power

• direction, power

• direction, motion

Tags

NGSS.HS-PS3-1

A push or pull on an object is :

• work

• power

• force

• none of the above

True or False: Work is done when you hold a heavy object for a long time.

• True, because you picked the object up so you applied force

• False, because there is no force on the object & it is not moving in any direction

• True, because the object is moving in the same direction as the force

• False, because the object is moving in the same direction as the force