The crate of mass m= 31 kg is at rest at A on the theta=7o incline. The coefficients of static and kinetic friction between the crate and the incline are mus=0.385 and muk=0.308 (i) Determine whether the crate will slide down the incline or remain at rest at A? (ii) What is the magnitude of the work done by all external forces acting on the crate during its displacement? (iii) Determine the magnitude of the crate’s potential energies at points A and B (iv) What will the crate’s final velocity be? (v) If energy is lost or increased, where did it go?

Principles of Physics: A Calculus-Based Text
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Chapter6: Energy Of A System
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The crate of mass m= 31 kg is at rest at A on the theta=7o incline. The coefficients of static and kinetic friction between the crate and the incline are mus=0.385 and muk=0.308

(i) Determine whether the crate will slide down the incline or remain at rest at A?

(ii) What is the magnitude of the work done by all external forces acting on the crate during its displacement?

(iii) Determine the magnitude of the crate’s potential energies at points A and B

(iv) What will the crate’s final velocity be?

(v) If energy is lost or increased, where did it go?

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