posted by Clothilda on .
A crate of mass 20kg is pulled by a force of 100N at an angle 30 above the horizon an friction force of 20N develops between the crate and surface draw a force diagram and free body diagram
We can't make drawings for you here.
Draw a rectangular block on a hozontal line (the level surface).
The forces acting on it, which should be shown as arrows, are:
Weight 20g = 198 N down
Friction force 20 N backwards
Ground force 198 - 100 sin30 N up
Pulling force 100 N at 30 deg above horizontal
The vertical component of the pulling forces helops to reduce the ground force.
Since there is a net forward force,
100 cos30 - 20 = 66.6 N,
the block will accelerate