Starr

How many neutrons are in the nucleus of a potassium atom with a mass number of 39?

At what point on a roller coaster does the train have the highest kinetic energy?

• at the bottom of the first drop
  

• at the top of the second hill
  

• when the train first leaves the loading station 

• at the top of the first drop 

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What energy transformations are occurring in this scenario?

• electrical energy --> mechanical energy --> light energy 

• solar energy --> electrical energy --> light energy
  

• solar energy --> mechanical energy --> light energy 

• solar energy --> electrical energy --> mechanical energy 

The tendency of objects to resist a change in motion is called:

• Friction

• Inertia

• Gravity

• Velocity

In the case of a car crash, the body’s inertia will continue to carry it to the right. However, if the person is wearing a seatbelt, in which direction will this force act?

• to the right

• to the left

• upward

• downward

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Suppose you pull Nick, who is standing on a skateboard, using a rope at a constant acceleration. What happens when you double the mass and add a friend?

• There will be no change to the required amount of force.

• The amount of force required is slightly increased.

• The amount of force required is doubled.

• The amount of force required is four-times as great.

Tags

NGSS.MS-PS2-2

Samuel kicks a soccer ball across a grassy field and it eventually comes to a stop. If Newton’s law of inertia is true, why did the ball stop?

• Newton’s law only applies to objects at rest. 

• The mass of the ball is not great enough to have inertia. 

• Friction with the grass applies a net force on the ball causing it to decrease its speed. 

• Gravity slowed the ball until it came to a stop. 

Tags

NGSS.MS-PS2-2

A ball at the top of a hill has ________ ________ because if pushed it will roll down the hill.

• Mechanical Force

• Unbalanced Energy

• Potential Energy

• Unbalanced Force

Tags

NGSS.MS-PS3-2

When a student runs and kicks a ball, they have applied an ___________ force to move the ball.

• Balanced

• Magnetic

• Spring

• Unbalanced

Tags

NGSS.MS-PS2-2

Standing in line is an example of a ________ ________ since you are not moving forward, backward, or sideways.

• negative acceleration

• balanced force

• unbalanced force

• 1st law of motion