An object with a mass of 4 kg is moving at 7 m/s over a surface with a kinetic friction coefficient of 3 . How much power will it take to accelerate the object at #4 m/s^2?

1 Answer
Sep 9, 2017

952 watt

Explanation:

As the object is moving hence force due to friction on it is f=mu_kN=mu_kmg
:. f=3×4×10=120N
Now additional force needed to be applied to achieve desired acceleration =ma=4×4=16N
Hence total force needed to be applied =120+16=136N
Now power P=F.v=136×7=952W