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Physics Chapter 5 Quiz
Terms in this set (8)
A block is pulled along a rough level surface at constant speed by the force . The figure shows the free-body diagram for the block.
represents the normal force on the block; and represents the force of kinetic friction.
Reference: Ref 4-8
What is the magnitude of ?
Two identical blocks are pulled along a rough surface as suggested in the figure. Which one of the following statements is false?
The magnitude of the force of kinetic friction is greater for the block on the right.
A 2.0-N rock slides on a frictionless inclined plane. Which one of the following statements is true concerning the normal force that the plane exerts on the rock?
The normal force is less than 2.0 N, but greater than zero newtons.
Which force is responsible for holding a car in a frictionless banked curve?
the horizontal component of the normal force
Which force is responsible for holding a car in an unbanked curve?
the force of friction
Complete the following statement: The maximum speed at which a car can safely negotiate an unbanked curve depends on all of the following factors except
the coefficient of kinetic friction between the road and the tires.
Complete the following statement: The maximum speed at which a car can safely negotiate a frictionless banked curve depends on all of the following except
the mass of the car.
A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50.
Reference: Ref 4-9
Suppose that the block now moves across the surface with constant speed under the action of a horizontal 3.0-N force. Which one of the following statements concerning this situation is false?
The direction of the total force that the surface exerts on the block is vertically upward.
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