Sample Example with Solutions - Essential Physics | PHYS 200, Assignments of Physics

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Example 29: During a rock slide, a 520 kg rock slides down from rest down a hillside that is 500 m long and 300 m high. The coefficient of kinetic friction between the rock and hill surface is 0.25. (a) How much work is done by kinetic friction? (b) What is the speed of the rock at the bot om of the hill? A) Woe ten = Fe BS ce 8 7 My Fy AS (os? Fy z? Fre the y- Cow PORE 4 egvollen of Nate's 2 ees ° fF, = = mag * — od thot Wy Fy Fr Fye Fay x mg C58 cf \ Ser - . Wee kent My 09 sb @s6 AS 6 = } 90° (65 = : _we hig. tos S00 me Be eee Bs ein Gasp Bas ass putas all of the Pieces to getler.. Wp pebian = (25)( S20 bs )(4ilm|/st) (0.8575 V oso?) (53m) Weraien —&gKerd 1 one 55 So! Remmber BS 5 Se haw Fae the yeele tevelss Ta +hy Polen, BS is thy Chapter 6 _ 48 hypotenuse of the trlande jn tle prityee ‘ “y