Forces on Inclined Planes Quiz

What is the angle of the incline on which the car is resting?

• 25°

• 20°

• 10°

• 15°

Which force is always perpendicular to the surface in a free body diagram?

• Gravity

• Normal Force

• Tension

• Friction

What is the formula used to calculate the force perpendicular to the incline?

• mg

• mg tan(θ)

• mg cos(θ)

• mg sin(θ)

How is the force of gravity resolved on an inclined plane?

• Into tension and compression components

• Into frictional and normal components

• Into parallel and perpendicular components

• Into horizontal and vertical components

What is the value of the force parallel to the incline due to gravity?

• 15,000 N

• 98,000 N

• 25,364 N

• 94,661 N

What must the force of friction equal for the car to remain at rest?

• The force of gravity

• The total weight of the car

• The normal force

• The downhill component of gravity

What is the formula for calculating the coefficient of friction?

• Normal force / Force of gravity

• Force of gravity / Normal force

• Force of friction / Normal force

• Normal force / Force of friction

What is the calculated coefficient of friction for the car on the incline?

• 0.268

• 0.568

• 0.368

• 0.468

If the car were accelerating downhill, which additional factor would need to be considered?

• Air resistance

• Decreased normal force

• Increased friction

• Net force equals mass times acceleration

What is the net force on the car if it is at rest on the incline?

• Positive

• Negative

• Equal to the force of friction

• Zero