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WorksheetsFriction Physics
Total questions: 15
Worksheet time: 15mins
A box takes 40 N to start moving when the coefficient of static friction is .54. What is the weight of the box?
81 N
18 N
98 N
74 N
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
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)?
0N
2.1N
7.7N
8.0N
A cart rolls down an inclined plane with constant speed as shown in the diagram below. Which arrow represents the direction of frictional force?
A
B
C
D
A 10.-newton block is sliding down a 30-degree incline at a constant speed. What is the force of friction?
5N
4.9N
10N
98N
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
Normal force is
Always opposite the weight
Always parallel and down the incline
Always perpendicular to the surface
It depends on the direction of motion
Assuming both objects are at rest, which object is more massive? M1 or M2?
M1 is more massive
M2 is more massive
both M1 and M2 are the same mass
To find the normal force
mg
sin(θ)mg
cos(θ)mg
tan(θ)mg
What is the force that opposes the relative motion or tendency of such motion of two surfaces in contact?
Gravitational force
Frictional force
Magnetic force
Electrostatic force
A block of mass 5 kg is placed on a rough horizontal surface. If the coefficient of static friction is 0.4, what is the minimum horizontal force required to start moving the block?
10 N
15 N
20 N
25 N
A car is moving on a road with a constant speed. If the frictional force between the tires and the road is 200 N, what is the work done by the frictional force when the car travels 50 meters?
0 J
1000 J
2000 J
5000 J
Which of the following statements is true about friction?
Friction always acts in the direction of motion
Friction can be reduced to zero by polishing surfaces
Friction is independent of the area of contact
Friction is a conservative force
A 10 kg box is sliding down a 30-degree incline. If the coefficient of kinetic friction is 0.3, what is the force of friction acting on the box?
15 N
25 N
30 N
35 N
In an experiment, a block is placed on an inclined plane and the angle is gradually increased. At what angle does the block start to slide if the coefficient of static friction is 0.5?
15 degrees
30 degrees
45 degrees
60 degrees
