The device (D) is designed to position pieces of luggage on aramp. The device ex
ID: 1815464 • Letter: T
Question
The device (D) is designed to position pieces of luggage on aramp. The device exerts a force parallel to the ramp. If the massof suitcase (S) is 9 kg and the coefficient of friction between theramp and suitcase are s= 0.20 k=0.18. a) will the suitcase remain stationary on the ramp when thereis no force exerted by the device? b) what force must the deviceexert to start the suitcase moving up the ramp?Explanation / Answer
a) If the suitcase is stationary, then it will not move so N =mgcos(20) Ffric = mgcos(20)*s= 16.6 Gravitation will pull the suitcase down the ramp with Fg =mgsin(20) = 23.5 Since Fg > Ffric, the suitcase will not remain at rest b) You will need a larger force than Fg + Ffric = 40 N to get thesuitcase to move up the ramp