Posted by **max** on Sunday, February 21, 2010 at 2:02am.

A crate full of artichokes rests on a ramp that is inclined 10.0° above the horizontal. Give the direction of the normal force and the friction force acting on the crate in each of these situations.

(a) The crate is at rest.

Normal Force :

1.perpendicular to and away from the ramp

2.perpendicular to and into the ramp

3.along the ramp upward

4.along the ramp downward

Friction force :

1.perpendicular to and away from the ramp

2.perpendicular to and into the ramp

3.along the ramp upward

4.along the ramp downward

(b) The crate is being pushed and is sliding up the ramp.

Normal Force :

1.perpendicular to and away from the ramp

2.perpendicular to and into the ramp

3.along the ramp upward

4.along the ramp downward

Friction force :

1.perpendicular to and away from the ramp

2.perpendicular to and into the ramp

3.along the ramp upward

4.along the ramp downward

(c) The crate is being pushed and is sliding down the ramp.

Normal Force :

1.perpendicular to and away from the ramp

2.perpendicular to and into the ramp

3.along the ramp upward

4.along the ramp downward

Friction force :

1.perpendicular to and away from the ramp

2.perpendicular to and into the ramp

3.along the ramp upward

4.along the ramp downward

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