An object with a mass of #15 kg# is moving at #9 m/s# over a surface with a kinetic friction coefficient of #4 #. How much power will it take to accelerate the object at #3 m/s^2?
2 Answers
Frictional force acting on the object is
So, let's assume we will be requiring a force of F to accelerate the object at 3
So,using equation of force we can write,
Or, F =
Now,if this force cause displacement s of the object wi th in time t,power will be (work done/time) i.e 645
The power is
Explanation:
The mass of the object is
The speed is
The acceleration is
The coefficient of kinetic friction is
The normal force is
The frictional force is
The force necessary to accelerate the object is
The acceleration due to gravity is
According to Newton's Second Law
The power is