# Physics

A 19 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 23.2 degrees the crate begins to slide downward. what is the coefficient of static friction between the crate and the ramp? At what angle does the crate begin to slide it its mass is doubled? I just need to know how to approach this problem because i'm lost.

1. 👍 0
2. 👎 0
3. 👁 401
1. Fc = 19kg * 9.8 = 186.2N @ 23.2Deg = Weight of crate.

The Wt. of crate is broken down into 2
components:

Fp = 186.2*sin(23.2) = 73.35N parallel
to plane downward.

Fv=186.2*cos(23.2)=71.1N.perpendicular
to the plane downward.

Since the crate just beginsw to
move at 23.2 deg, we can assume that
Fp is = to the force of friction(uFv):

uFv = Fp,
171.1u = 73.35,
u = 73.35 / 171.1 = 0.429 = coefficient
of friction.

1. 👍 0
2. 👎 0
posted by Henry

## Similar Questions

1. ### phy

A 45 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 22 deg , the crate begins to slide downward. 1-What is the coefficient of static friction between the crate and the

asked by poul on July 18, 2011
2. ### Physics

A 45 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 29 degrees, the crate begins to slide downward. What is the coefficient of static friction between the crate and the

asked by Grace on February 22, 2010
3. ### Physics

A 32 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 23.2° the crate begins to slide downward. (a) What is the coefficient of static friction between the crate and the

asked by Bobby C on February 14, 2010
4. ### Physics

A 32 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 23.2° the crate begins to slide downward. (a) What is the coefficient of static friction between the crate and the

asked by Bobby C on February 15, 2010
5. ### Physics

A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 40 ∘ above the horizontal. The crate has mass 162

asked by Denny on February 9, 2016
6. ### physics

A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 38∘ above the horizontal. The crate has mass

asked by vamm on January 18, 2014
7. ### physics 1401

a 15kg crate initially at rest slides down a ramp 2m long and inclined at an angle of 20 degrees with the horizontal. If there is no friction between the ramp surface and crate, what is the velocity of the crate at the bottom of

asked by jcarrington on June 28, 2015
8. ### physics

A 1520-N crate is to be held in place on a ramp that rises at 30.0° above the horizontal. The massless rope attached to the crate makes a 22.0° angle above the surface of the ramp. The coefficients of friction between the crate

asked by Sandhya on March 31, 2011
9. ### PHYSICS HELP!!!!!

A crate starts from rest and slides 8.35 m down a ramp. When it reaches the bottom it is traveling at a speed of 5.25 m/s. The ramp makes an angle of 20.0o with the horizontal. b) What is the coefficient of kinetic friction

asked by Kayla L on October 10, 2011
10. ### Physics - Inclined Motions

You are pushing a 53kg crate at a constant velocity up a ramp onto a truck. The ramp makes an angle of 22deg with the horizontal. If your applied force is 373N, what is then coefficient of friction between the crate and the ramp?

asked by Shaila on August 11, 2010

More Similar Questions