Inclined plane

The body stays on an inclined plane and exerts a compressive force of 70N on it.
Find the angle between the inclined plane and the horizontal if a gravitational force of 100N acts on the body.

Correct answer:

A =  44.427 °

Step-by-step explanation:

a=70 N c=100 N  sinA=a:c  A1=arcsin(a/c)=arcsin(70/100)0.7754  A=A1=A1 180π=0.7754 180π=44.427=442537"

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