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Forces And Equilibrium
Test Description: Hooke's Law/Frictional Force
Instructions: Answer all questions to get your test result.
1) A spring with a spring constant of 68 newtons per meter hangs from a ceiling. When a 12N downward force is applied to the free end of the spring, the spring stretches a total distance of..
A
0.59 m
B
820 m
C
5.7m
D
0.18 m
2) A 3.00 newton force causes a spring to stretch 60.0 centimeters. Calculate the spring constant
A
3 N/m
B
2 N/m
C
5 N/m
D
10 N/m
3) A .2 kg block is slid across a horizontal table with a velocity of 4m/s. What is the weight of the block?
A
1.96 N
B
2.12 N
C
0 N
D
9.8 N
4) A student is in an elevator traveling from the first to tenth floor. When does the student exert the greatest force on the floor?
A
accelerating upward as it leaves the first floor
B
Slowing down approaching the 10th floor
C
moving up at a constant speed
D
at rest on the first floor
5) A 10 kg box is sliding across a level floor. The box is acted upon by a force of 35 N east and a frictional force 15 N west. What is the magnitude of the acceleration of the box?
A
2.0 m/s2
B
10 m/s2
C
8.8 m/s2
D
0.50 m/s2
6) What does the k stand for in the Hooke's Law equation?
A
deformation of the spring
B
coefficient of friction
C
net force
D
spring constant
7) Hooke's Law states the amount a spring stretches is _____ proportional to the amount of force applied to it.
A
always
B
directly
C
inversely
D
not
8) A 65 kg astronaut weighs 638 newtons at the surface of Earth. What is the mass of the astronaut at the surface of the Moon, where the acceleration due to gravity is 1.62m/s2?
A
15 N
B
50 N
C
65 N
D
1.1 N
9) Which of the following would be a way to use friction?
A
cleats on cross country shoes
B
Oil on ball bearings
C
blades on ice skates
D
wheels
10) A 980 N sign is hanging from two chains. What is the tension force for each chain?
A
9.8 N
B
980 N
C
490 N
D
2 N
*select an answer for all questions
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