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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