Force and Motion

Which of the following statements is true? 

• Balanced forces cause a change in motion. 

• Unbalanced forces cause a change in motion. 

• Forces do not effect the change in motion. 

Tags

NGSS.MS-PS2-2

If a 10 kilogram object accelerates suddenly at 15 m/s², how much force was applied to the object?

• 150 Newtons

• 15 Newtons

• 150 kilograms

• 100 kilograms

Tags

NGSS.MS-PS2-2

When a bird flies, its wings push air downward. As a result the air pushes back upward on the bird. Which law of motion most applies to the way the wings of a bird beat? 

• Every action has an equal and opposite reaction

• The rate of acceleration of an object depends on the amount of force applied.

• Objects in motion tend to remain in motion until acted upon by an another force. 

• Force is defined by mass times acceleration

Tags

NGSS.MS-PS2-1

A student walking quickly while carrying an orange on his lunch tray stops suddenly. The orange will most likely roll off the tray due to

• inertia of the orange. 

• centripetal force of the orange

• the friction acting on the orange.

• the balanced forces acting on the orange.

Angela blows air into a balloon and holds the end of it closed with her fingers. When she lets go of the end of the balloon, Angela observes that the release of the air propels the balloon.  The propelling of the balloon from the release of the air is an example of which of Newton’s laws? 

• The force of an object is the product of its mass multiplied by its acceleration. 

•  A force of attraction exists between any two objects with mass. 

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

• An object in motion tends to stay in motion unless an unbalanced force acts upon it. 

Tags

NGSS.MS-PS2-1

When you kick a football, you are applying ________ to the ball.

• mass

• gravity

• unbalanced force

• balanced force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When you tell the direction and speed of an object, you give its

• motion

• velocity

• acceleration

• mass

Speed is different from velocity because

• Velocity has a direction

• Speed uses Distance /Time

• Velocity doesn't include time

• Velocity doesn't include distance

What is this graph showing?

• Constant Speed

• Acceleration (speeding up)

• Deceleration (slowing down)

• No motion

8 N to the left , and 4 N to the right. Find the net force. Is this balanced 

• 12 N Right  No

• 4 N Left  No

• 12 N Right  Yes

• 4 N Left  Yes

Tags

NGSS.MS-PS2-2