Questions
A particle is projected with a velocity u making an angle with the horizontal. The instantaneous power of the gravitational force
a
Varies linearly with time
b
Is constant throughout
c
Is negative for complete path
d
None of these
detailed solution
Correct option is A
At any time,v→=[ucosθ]i^+(ucosθ−gt)j^P=F→ . v→=(−mgj^) . [ucosθi^+(usinθ−gt)j^]mg2t – mg u sinθHence, power varies linearly with time.Talk to our academic expert!
Similar Questions
If force F is applied on a body and it moves with the velocity V, the power will be :
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