Question
Question: A block of mass m slides along the track with kinetic friction µ. A man pulls the block through a ro...
A block of mass m slides along the track with kinetic friction µ. A man pulls the block through a rope which makes an angle q with the horizontal as shown in the figure. The block moves with constant speed V. Power delivered by the man is
A
TV
B
TV cos q
C
(T cos q – µ mg) V
D
Zero
Answer
TV cos q
Explanation
Solution
P = F.V = TV cos q