physical sciences

A person is standing in the middle of a boxcar on a train moving 100 km per hour. If the motion of the boxcar

, where in the boxcar will the person most likely land after he jumps straight up?

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Which term is an example of force?

• weight

• energy

• work

• mass

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which person has gained the most gravitational potential energy ?

• a. a 50kg person who lives on the second floor

• b. a 50kg person who lives on the third floor

• c. a 100kg person who lives on the second floor

• d. a 100kg person who lives on the third floor

As you are riding in your car down the road, how do the light poles appear to move?

• A. forward

• B. backward

• C. They are stationary and do not move

• D. In the same direction as you

A student is riding her bicycle down the street. She passes the mailman pulling mail from the corner mailbox. To the mailman, how does the student appear to move?

• A. forward

• B. backward

• C. She does not appear to be moving

• D. In the same direction as the mailman

Click on each action that will reduce the rate at which the speed of the basket changes.

• Pull with less force

• Pull with more force

• Add an apple to the basket

• Take an apple out of the basket

• Roughen the surface to increase friction

An object moves at a constant speed.

What will happen to this object’s motion over time if no new forces are applied?

• It will change direction.

  
  

• It will increase in speed.

• It will decrease in speed.

• It will maintain a constant speed.

What type of potential energy is released from a hand warmer?

• elastic potential energy

• gravitational potential energy

• chemical potential energy

• kinetic energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Every force has __________________ .

• direction

• strength

• push

• direction AND strength

When forces are balanced, the net force is __________ .

• zero

• one

Tags

NGSS.HS-PS2-1