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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)
The work-energy theorem is valid only for positive work done.
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
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
For the graph shown in the figure, what is the area under the curve AB called?
a) Force applied
A “variable force” is the force that only increases with time.
0 h : 0 m : 1 s
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