forces in two dimensions

Friction is an example of _____________

• contact force

• non contact force

• both of these

• none of these

The direction of force of friction is always _____ to the direction of motion

• same

• opposite

• unchanged

• none of these

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

Tags

NGSS.MS-PS2-1

Which of these is an example of sliding friction?

• a badminton shuttlecock flying over the net

• a basketball rolling across a wooden floor

• a flying kite pushed by a gentle breeze

• a hockey puck moving across the ice

What type of friction is not moving?

• static
• dynamic
• kinetic
• rolling

Tags

NGSS.MS-PS2-2

The sum of all forces acting on an object and direction

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

Tags

NGSS.MS-PS2-2

Which of the following is the best expression for the Normal Force?

• F_N = mg cos(ϴ)

• F_N = mg sin(ϴ)

• F_N = mg sin(180-ϴ)

• F_N = mg cos(90-ϴ)

Tags

NGSS.HS-PS2-1

Normal force is [ ]to the surface that object contacts.

• parallel

• perpendicular

What are the units on the coefficient of friction?

• none
• Newtons
• meters
• kilograms

A flat, sloped surface is called a(n)...

• Lever
• Screw
• Fulcrum
• Inclined Plane