Forces at Angles, Inclines and Friction

If an object is at rest on an inclined plane, which of the following forces is greatest?

• Normal Force
• Friction
• Weight
• Both Normal Force and Weight are equal, so they both are the greatest.

Tags

NGSS.HS-PS2-1

Assuming both objects are at rest, which object is more massive? M1 or M2?

• M1 is more massive
• M2 is more massive
• both M1 and M2 are the same mass

Tags

NGSS.HS-PS2-1

Assuming both objects are at rest, which side of the string has more tension?

• There is more tension on the side by M1
• There is more tension on the side by M2
• The tension on both sides is the same

Tags

NGSS.HS-PS2-1

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

Friction acts in a direction ___________ to the object's direction of motion.

• similar
• opposite
• parallel
• west

Normal force is__________to the surface that object contacts.

• parallel

• perpendicular

What is the x-component of force if the mass of the box is 42kg and the angle is 37º?

• 335 N

• 252 N

• 212 N

• 350 N

Tags

NGSS.HS-PS2-1

What is the net force felt by the 42 kg box on a 37° angle if the force of kinetic friction is 57 N?

• 272 N

• 248 N

• 57 N

• 195 N

Tags

NGSS.HS-PS2-1

A cart rolls down an inclined plane with constant speed as shown in the diagram below. Which arrow represents the direction of frictional force?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1

The diagram represents an object being held at rest on a frictionless incline. The net force is equal to

• zero
• normal force
• weight
• friction

Tags

NGSS.HS-PS2-1