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- 1. Multiple Choice
A box weighing 46 N rests on an incline that makes an angle of 25° with the horizontal floor. What is the magnitude of the component of the box’s weight perpendicular to the incline?
19 N
21 N
42 N
26 N
- 2. Multiple Choice
When the sum of all the forces acting on a block placed on an inclined plane is zero, the block __________.
must be at rest
must be accelerating
may be slowing down
may be moving at a constant speed
- 3. Multiple Choice
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?
0 N
2.1 N
7.7 N
8.0 N
- 4. Multiple Choice
A 1.0 × 105-newton truck at rest on a hill that makes an angle of 8.0° with the horizontal. What is the component of the truck’s weight parallel to the hill?
1.4E3 N
1E4 N
1.4E4 N
9.9E4 N
- 5. Multiple Choice
A cart rolls down an inclined plane with constant speed as shown in the diagram. Which arrow represents the direction of frictional force?
A
B
C
D
- 6. Multiple ChoiceA 10.-newton block is sliding down a 30-degree incline at a constant speed. What is the force of friction?5N4.9N10N98N
- 7. Multiple ChoiceA 10.0-kilogram mass held at rest on a frictionless 30.0º incline by force F. What is the magnitude of force F?49.1N98.1N85N9.81N
- 8. Multiple ChoiceA 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 incline5.3 m/s^2 up the incline2 m/s^2 up the incline3.9 m/s^2 down the incline
- 9. Multiple ChoiceA 50.-kilogram crate is on a frictionless plane at some angle to the horizontal. The crate is pushed at constant speed up the incline by force F. If angle were increased, what would be the effect on the magnitude of force F?increasedecreasestay the samenot enough info
- 10. Multiple Choice
The diagram represents an object being held at rest on a frictionless incline. The net force is equal to _____.
zero
normal force
weight
friction
- 11. Multiple ChoiceA block of mass 5 kilograms lies on an inclined plane at 37 degrees. The horizontal and vertical supports for the plane have lengths of 4 meters and 3 meters, respectively. The coefficient of friction between the plane and the block is 0.3. The magnitude of the force F necessary to pull the block up the plane with constant speed is most nearly30424950
- 12. Multiple ChoiceA block of mass 5 kilograms lies on an inclined plane at 37 degrees. The horizontal and vertical supports for the plane have lengths of 4 meters and 3 meters, respectively. The coefficient of friction between the plane and the block is 0.3. The magnitude of the force F necessary to pull the block up the plane with constant speed is most nearly30424950
- 13. Multiple ChoiceA wooden box is first pulled across a horizontal steel plate. The box is then pulled across the same steel plate while the plate is inclined. How does the force required to overcome friction in the inclined case compare to the horizontal case ?biggersmallerthe samenot enough info
- 14. Multiple ChoiceA block weighing 10.0 newtons is on a ramp inclined at 30.0° to the horizontal. A 3.0-newton force of friction, Ff , acts on the block as it is pulled up the ramp at constant velocity with force F, which is parallel to the ramp, as shown in the diagram below. What is the magnitude of force F?7N8N10N13N
- 15. Multiple Choice
A block m rests on a ramp, making angle θ with the horizontal floor. As angle theta is increased, _______.
the block's mass will decrease
the block's mass will increase
the block's component of weight parallel to the ramp will increase
the block's component of the weight parallel to the ramp will decrease
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