Forces and Motion Test Review

Newton's third law states that

• An object at rest tends to stay at rest, and an object in motion tends to stay in motion, with the same direction and speed.

• For every action, there is an equal and opposite reaction.

• Force equals mass times acceleration

Tags

NGSS.MS-PS2-1

Newton's second law states that

• An object at rest tends to stay at rest, and an object in motion tends to stay in motion, with the same direction and speed.

• For every action, there is an equal and opposite reaction.

• Force equals mass times acceleration

Newton's first law states that

• An object at rest tends to stay at rest, and an object in motion tends to stay in motion, with the same direction and speed.

• For every action, there is an equal and opposite reaction.

• Force equals mass times acceleration

The image below shows two opposite forces acting during Tug-a-war, what can we say is true about the effect of the forces on the cart?

• It cannot be determined without knowing which team is stronger.

• The forces are unbalanced, and net force on the rope moves it to the left.

• It cannot be determined because one team looks stronger than the other.

• The forces are unbalanced, and net force on the rope moves it to the right.

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NGSS.MS-PS2-2

How could you make an electromagnet stronger? (Think about the ones you created in STEM) Choose 2

• make the wire longer

• make the wire shorter

• increase the number of loops of wire around the nail

• spread the loops of wire apart on the nail so they have room to breathe

• increase the size on the iron nail

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Where is the gravitational pull on earth the strongest?

• closest to earth's core

• on top of a mountain

• on a beach

• at the north pole

Why don't we feel a gravitational force between ourselves and other people?

• We don't exert gravitational forces.

• Our gravitational forces as people are so small compared to the earth's gravitational pull.

• Our gravitational forces cancel each other out.

• The amount of people on earth balance out all the different gravitational forces.

Which of the following would result in a stronger gravitational force?

• More Mass

• Less Mass

• More Distance

• Less Distance

Tags

NGSS.MS-PS2-2

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Which of the following would result in a weaker gravitational force?

• More Mass

• Less Mass

• More Distance

• Less Distance

Tags

NGSS.MS-PS2-4

Which of these is an example of Newton's First Law of Motion?

• A pencil being thrown across the classroom.

• A volleyball thrown in the air falls to the ground.

• A baseball remains motionless until it is thrown by a player.

• A hockey player pushes off from a wall and moves backwards.