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(elm 8.8) maleve art to Date: (/I ES) bigo ant me netented ertl (d ruminim er Fun with S.I.N. Please enjoy the following questions that are from S.I.N. tests of years past. (you know enough physics to answer them, meet the challenge!) After a bobsled race, the sled and riders 12 Slide on Incline have been partially slowed down up an icy A block of mass m incline, but they need to be brought to a stop. has an initial velocity Vi directed up an incline HK m This happens on a portion of track inclined at 30 that has a coefficient of kinetic friction of which makes an angle d 0.60. The sled enters the incline at 25.0m/s. to the horizontal. The How far does it incline is rough, with a travel along the - 25 m/s coefficient of kinetic friction Mk. The block incline before slides up the incline a distance x before com- stopping? Answer ing to rest; as the coefficients of both static in metres. and kinetic friction are less than tan 0 it then proceeds to slide back down the incline. What (a) 12.4 (b) 61.4 (c) 29." is its speed, uf, when it is back at its original (d) 63.8 (e) 31.3 position? sin 8 + HK Cos 0 cos 0 - HK Sin 0 c) vill vellu9 8 printe a) vil sin 0 - Hk Cos 0 cos 8 + MK sin. 0 d) Vi y Two Blocks atiq zesinonbill & 15V12 b ) vil sin 0 - HK Cos 0 cos 0 + HK sin 0 Two blocks are con- sin 0 + MK cos 0 e ) vil cos 0 - UK sin 0 nected by a light meleve rigid rod and are slid- mj ing down an incline. Five er 13 . A truck is delivering some "beverages" to which makes an angle Premier Klein of Alberta. It has a floor with 6 = 22.60 with the horizontal. The rod points coefficient of friction 0.28. The truck is climbin along the incline and is parallel to it with the () SO a slope of 10. What is the maximum acceleration lighter mass, m2 = 3.00 kg, at the top and the the truck can have without causing the box heavier mass, mi = 5.00 kg, at the bottom. inside to slip backwards? Answer in m/s The coefficient of kinetic friction between the lighter mass and the incline is /2 = 1/3 and that between the heavier mass and the incline is #1 = 1/4. Calculate the tension, Fr, in the rod (a negative tension is a compression). An- swer in Newtons. a) 0.587 b) 1.41 c) 4.23 d) 5.64 e) 18.85 10 (a) 1.0 b) 2.0 (c) 0.50 (d) 1.5 (e) 2.7