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- Show that the acceleration of any object down an incline where friction behaves simply (that g(sin @ — иk сos @). is, where fk = HK N) is a = g(sin 0 – µk cos 0). Note that the acceleration is independent of %3D mass and reduces when friction becomes negligibly small (Hk = 0). YA aConsider the 65.0 kg Ice skater being pushed by two others shown In the figure. Frot F2 Free-body diagram F, F, F, (a) Find the direction (in degrees) and magnitude (in N) of F,et, the total force exerted on her by the others, glven that the magnitudes F, and F, are 25.2 N and 15.4 N, respectively. direction o (counterclockwise from the direction of F, is positive) magnitude (b) What is her initial acceleration (in m/s?) if she is initlally stationary and wearing steel-bladed skates that point in the direction of F? (c) What is her acceleration (in m/s2) assuming she is already moving in the direction of Fot? Remember that friction is always in the opposite direction of motion or attempted motion between surfaces in contact. m/s? (in the direction of Frot)A dockworker loading crates on a ship finds that a 20.0-kgcrate, initially at rest on a horizontal surface, requires a 75.0-Nhorizontal force to set it in motion. However, after the crate isin motion, a horizontal force of 60.0 N is required to keep itmoving with a constant speed. Find the coefficients of staticand kinetic friction between crate and floor.
- a) show the free-body diagram for th two masses. b) Determine the magnitiude of te acceleration of te two masses and the tension in string 1 kg Ja 230° ÚGkyIn the figure, tro blocks connected by a string slide down an inclined plone. The coefticient of Kinetic friction between ine 4.00 kg block in the plane is 0.20; that between the 8. 00 Kg and the plane is 0.30. (3.) Calcula te the acceleration of the tension in the string. 00'8Please show work thank you