Questions
If the force acting on a body is inversely proportioned to its speed, then its kinetic energy is
a
directly propotional to time.
b
Inversely proportional to time
c
inversely proportional to the square of the time.
d
a constant
detailed solution
Correct option is A
F α 1V ⇒ FV = constant ⇒ power= constant ∴ power = worktime ; substitute in above equation ⇒worktime=constant ∴ work α time work done = change in KE; substitute in above equation ∴ change in K.E. α time ⇒KE is proportional to time ⇒KE is linearly related to timeTalk to our academic expert!
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