1.

A force of (7hati +6hatk) newton makes a body move on a rough plane with a velocity of (3 hatj+4hatk) ms^(-1). The power in watt is

Answer»

24 
34 
21 
45 

Solution :POWER, `P , vecF .Vecv = (7 hati + 6hatk).(3hatj + 4hatk) = 24 W`.


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