# 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