A crate of mass M rests against a stop block s, which prevents the crate from moving down the plane. If the coefficients of static and kinetic friction between the plane and the crate are μ_s and μ_k respectively, determine the time needed for the force F to give the crate a speed v up the plane. The force always acts parallel to the plane and has a magnitude of F = at.

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Given: M = 50 kg V 2 m S a = 300 Zu S 8 = 30 deg Hs = 0.3 Mk = 0.2 8 = 9.81 m 2 S