In the following figure, what is the minimum coefficient of friction needed between the block and fixed incline so that the system does not move. A B C D

Context: m The object of mass m = 3 kg is at the bottom of the incline, which is at the angle e = 55° with respect to horizontal. The object has initial speed of vo = 5 m/s and begins slide up the incline. There is a friction between the object and the incline. The coefficient of kinetic friction is uk = 0.25. The object moves up the incline and eventually stops under the influence of friction and its own weight. Find: (a) how high up the incline (in m, relative to its original position) the object slides before stopping (careful here - your answer is the height, i.e. the vertical distance between object's final position and the ground); (b) work in J) done by the kinetic friction when the object moves up the incline (careful with the sign); (c) work in J) done by the normal force when the object moves up the incline; (d) work in J) done by the gravity when the object moves up the incline (careful with the sign); (e) when the object reaches the highest point on the incline it begins to slide back down, find object's speed (in m/s) at the bottom of the incline. Answer question

A 2.2-kg block rests on a 30.0° incline as shown in the figure.The coefficient of static friction between the block and the incline is 0.63. There is a horizontal force force F  of 6.4 N applied to the block. This is the maximum force possible without causing the block to slip. What is the normal force exerted on the block by the inclined surface?Express your answer in N, to at least one digit after the decimal point.

In figure, coefficient of friction between m1 and m2 is m and that between m1 and the wall is zero. A force F is pressing the system against the wall. Minimum value of force required to hold the system in equilibrium is A.mm1g  B.mm2gC.m(m1 + m2)g  D.system cannot be held in equilibrium

(c) Determine the friction force exerted on the block (assumed to be constant).

A wooden block of mass 2.80 kg2.80 kg is sliding down a slope with acceleration 0.360 m s−20.360 m s−2. The slope makes an angle 16.0∘16.0∘ with the horizontal.Calculate the coefficient of dynamic friction, μdμd.