# An object with a mass of 5 kg is on a plane with an incline of pi/8 . If the object is being pushed up the plane with  18 N  of force, what is the net force on the object?

Jul 24, 2017

The net force is $= 0.8 N$ acting down the plane

#### Explanation:

Resolving in the direction parallel to the plane ↗^+

The force is $F = 18 N$

The component of the weight is $= - m g \sin \theta$

Therefore the net force is

Net $F = 18 - 5 \cdot 9.8 \cdot \sin \left(\frac{1}{8} \pi\right)$

$= 18 - 18.8 = - 0.8 N$