Inclined planes

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

A box weighing 46 newtons rests on an incline that makes an angle of 25° with the horizontal. What is the magnitude of the component of the box’s weight perpendicular to the incline?

• 19N
• 21N
• 42N
• 26N

Tags

NGSS.HS-PS2-1

An 8.0-newton block is accelerating down a frictionless ramp inclined at 15° to the horizontal. What is the magnitude of the net force causing the block’s acceleration?

• 0N
• 2.1N
• 7.7N
• 8.0N

Tags

NGSS.HS-PS2-1

A 10.0-kilogram mass held at rest on a frictionless 30.0º incline by force F. What is the magnitude of force F?

• 49.1N
• 98.1N
• 85N
• 9.81N

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)

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

If there is no friction, then the acceleration would be equal to

• mg

• sin(θ)mg

• g

• sin(θ)g

Tags

NGSS.HS-PS2-1

A 3.0-kg block slides on a frictionless 20° inclined plane. A force of 16 N acting parallel to the incline and up the incline is applied to the block. What is the acceleration of the block?

• 2 m/s^2 down the incline
• 5.3 m/s^2 up the incline
• 2 m/s^2 up the incline
• 3.9 m/s^2 down the incline

Tags

NGSS.HS-PS2-1

A 20.0-kilogram mass held at rest on a frictionless 25.0º incline by force F. What is the magnitude of force F?

• 49.1N

• 98.1N

• 83N

• 9.81N

Tags

NGSS.HS-PS2-1

An 8.0-newton block is accelerating down a frictionless ramp inclined at 15° to the horizontal. What is the magnitude of the net force causing the block’s acceleration?

• 0N
• 2.1N
• 7.7N
• 8.0N

Tags

NGSS.HS-PS2-1