The first thing you will investigate is static friction. The force of static fri

Question

The first thing you will investigate is static friction. The force of static friction is the parallel force exerted on a stationary object by the ramp. This force is always directed opposite the direction the object would slide if there were no friction.

Select the crate as the object for the ramp. Then, slowly increase the ramp angle. The individual forces acting on the crate are shown. They

The first thing you will investigate is static friction. The force of static friction is the parallel force exerted on a stationary object by the ramp. This force is always directed opposite the direction the object would slide if there were no friction. Select the crate as the object for the ramp. Then, slowly increase the ramp angle. The individual forces acting on the crate are shown. They'll look something like this: What is the maximum ramp angle that still allows the crate to remain at rest? (Make sure the coefficient of friction is 0.7.) Express your answer to the nearest degree.

Explanation / Answer

Force down ramp = mg sin

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