When a 40N force, parallel to and directed up the incline, is applied to a block on a frictionless incline that is 30o above the horizontal, the acceleration of the block is 2.0 m/s2, up the incline. Find the mass of the block.

5.8 kg

Explanation:

We are given that

Force,F=40 N

Acceleration,a=

We have to find the mass of block.

Where

Explanation:

GIVEN:

applied force up the inclined plane,

angle of the plank from the horizontal,

acceleration of the body up the plane,

Now from the  schematic we balance the forces:

gas and liquid

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