02 - Forces and Dynamics

What is the unit of force?

• Kilograms
• Meters
• Meters/Second
• Newton

Which of these is a non-contact force?

• normal
• gravity
• friction
• air resistance

Tags

NGSS.HS-PS2-4

The force that opposes the force of gravity when an object is on a surface is called...

• force of gravity
• normal force
• friction force
• tension force

What force pulls an object towards earth?

• gravity
• friction
• normal
• tension

The force that opposes the motion of two surfaces sliding past each other is called ___________ force. 

• normal
• push
• friction
• pull

What is the net force of the diagram?

• 400 N Up
• 400 N Down
• - 400 N Down
• 800 N Down

The source of a force is called a(n):

• agent
• mass
• contact force
• long-range force

What is the net force of the diagram?

• 10 N
• 0 N
• 25 N
• 1 N

In a tug of war the left team pulls with a force of 200 N. The right team pulls with a force of 150 N. What is the Net Force?

• 50N to the left.
• 350N to the left.
• 350N to the right.
• 50N to the right.

Match the description with this free-body diagram.

• A book is at rest on a tabletop.
• A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling.
• An egg is free-falling from a nest in a tree. Neglect air resistance.
• A flying squirrel is gliding (no wing flaps) straight down from a tree to the ground at constant velocity. Consider air resistance.

Tags

NGSS.HS-PS2-1