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Quiz 1
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Q.1
For a body moving from position Xa to position Xb under a variable force, what is the work done?
a) W = F * (X2 – X1)
b) -W = F * (X2 – X1)
c) W = -F * (X2 – X1)
d) W = F * (X1 – X2)
Q.2
The work-energy theorem is valid only for positive work done.
a) True
b) False
Q.3
A car having a mass of 1 metric ton is moving with a speed ofm/s. It suddenly applies the brakes and skids to rest in a certain distance d. The frictional force between the tyres and road isN. What is the value of d?
a) 25 m
b) 50 m
c) 75 m
d) 100 m
Q.4
For the graph shown in the figure, what is the difference between x-coordinate of A and B called?
a) Internal pressure
b) External pressure
c) Work
d) Power
Q.5
For the graph shown in the figure, what is the area under the curve AB called?
a) Force applied
b) Displacement
c) Work
d) Power
Q.6
A “variable force” is the force that only increases with time.
a) True
b) False
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