friction and inclined planes

Front

What direction does friction act relative to motion?

Back

In the opposite direction.

Front

What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N?

Back

0.51

Front

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 (parallel to the ramp)?

Back

2.1N

Front

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?

Back

42N

Front

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

Back

F_N = mg cos(ϴ)

Front

Define friction.

Back

Friction is the resistance that one surface or object encounters when moving over another.

Front

What is an inclined plane?

Back

An inclined plane is a flat surface that is tilted at an angle to the horizontal, used to help raise or lower objects.

Front

What is the formula for calculating the force of friction?

Back

F_friction = μ * F_N, where μ is the coefficient of friction and F_N is the normal force.

Front

Explain the difference between static and kinetic friction.

Back

Static friction acts on objects that are not moving, while kinetic friction acts on objects that are sliding over each other.

Front

What is the role of the normal force on an inclined plane?

Back

The normal force acts perpendicular to the surface of the incline and supports the weight of the object resting on it.