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WorksheetsFriction Quiz
Total questions: 20
Worksheet time: 49mins
Friction is a force that acts in a direction ___________ of movement.
similar
opposite
parallel
perpendicular
How can friction be reduced?
Reduce the force acting between the two surfaces.
Reduce the roughness of the two surfaces coming in contact.
Use wax, grease, or oil.
All of the above are ways of reducing friction.
If an object is at rest on an inclined plane, which of the following forces is greatest?
normal force
friction
weight
Both normal force and weight are equal, so they both are the greatest.
What is the force of friction between a 950-N block of ice and the horizontal ground if μ = .12?
65 N
226 N
175 N
114 N
What is the coefficient of static friction if it takes 44 N of force to move an 86-N box on a horizontal surface?
0.78
0.51
0.78 N
0.58 N
A box requires 40 N to start it moving on a horizontal surface when the coefficient of static friction is .54. What is the weight of the box?
81 N
18 N
98 N
74 N
A 220-kg crate is pushed horizontally with a force of 700 N. If the coefficient of kinetic friction is 0.20, calculate the acceleration of the crate.
1.02 m/s2
1.22 m/s2
1.42 m/s2
1.62 m/s2
A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.20, and the push imparts an initial speed of 4.0 m/s?
2.8 m
3.4 m
4.1 m
5.2 m
If the mass of the block is 20.0 kg, what is the magnitude of Fgrav?
170 N
98.1 N
196 N
20.0 kg
If the mass of the block is 20.0 kg, what is the magnitude of Fnorm?
98.1 N
170 N
196 N
17.3 N
If the mass of the block is 20.0 kg, what is the magnitude of Ffrict if the block is at rest?
98.1 N
170 N
10.0 N
196 N
A block of mass m2 = 1.3 kg hangs from the end of a massless string that runs over a massless, frictionless pulley. The other end of the string is connected to another block of mass m1 = 2.2 kg on a horizontal table. The coefficient of kinetic friction between the table and m1 is 0.20. Find the acceleration of the system.
3.6 m/s2
2.4 m/s2
4.8 m/s2
0 m/s2
A block of mass m2 = 1.3 kg hangs from the end of a massless string that runs over a massless, frictionless pulley. The other end of the string is connected to another block of mass m1 = 2.2 kg on a horizontal table. The coefficient of kinetic friction between the table and m1 is 0.20. Find the tension in the string.
8.0 N
13 N
34 N
9.6 N
A block of mass m5 = 2.3 kg hangs from the end of a massless string which runs over a massless, frictionless pulley. The other end of the string is connected to another block of mass m4 = 6.1 kg on a surface inclined at an angle of 27° above the horizontal. Assuming there is no friction between m4 and the inclined plane, find the magnitude and direction of the acceleration of block m5.
1.6 m/s2, up
1.6 m/s2, down
0.55 m/s2, down
0.55 m/s2, up
A block of mass m5 = 2.3 kg hangs from the end of a massless string which runs over a massless, frictionless pulley. The other end of the string is connected to another block of mass m4 = 6.1 kg on a surface inclined at an angle of 27° above the horizontal. Assuming there is no friction between m4 and the inclined plane, find tension in the string.
24 N
36 N
60 N
48 N
A block of mass m5 = 2.3 kg hangs from the end of a massless string which runs over a massless, frictionless pulley. The other end of the string is connected to another block of mass m4 = 6.1 kg on a surface inclined at an angle of 27° above the horizontal. Now assume that there is friction between m4 and the inclined plan with a μk = 0.20. If m4 is sliding down the slope, find the magnitude and direction of the acceleration of m5.
0.72 m/s2, up
0.72 m/s2, down
3.7 m/s2, up
3.7 m/s2, down
