# An object with a mass of #9 kg# is on a ramp at an incline of #pi/12 #. If the object is being pushed up the ramp with a force of # 2 N#, what is the minimum coefficient of static friction needed for the object to remain put?

##### 2 Answers

To solve such problems always write down what is given and draw a diagram. Then use newtons laws to solve the problem.

#### Explanation:

Given:

The maximum value of static friction is:

Minimum value of coefficient of static friction =0.26

#### Explanation:

Clearly,the component of weight which is acting along the inclined plane is

I.e

But given only

Frictional force acting on the body

So,from condition of linear equilibrium we can write,

Solving we get,