You are helping your friend move, using a ramp to move boxes from the ground to the moving truck. You give a 26kg box a shove so it moves at 1.4m[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmmi10/alpha/144/char3D.pngs [Broken] at the bottom of the ramp. The angle that the ramp makes with the ground is 31[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/100/char0E.png. [Broken] The coefficients of static and sliding friction are 0.39 and 0.1, respectively.
a) For how much time does the box slide up the ramp?
b) How far up the ramp does the box slide?
c) When the box stops sliding up the ramp, does it remain stopped or begin sliding back down?
d) Explain how you determined your answer for part (c):
u = a/g
a = delta v / delta t
other friction equations
The Attempt at a Solution
.39*9.8*26 = 99.372
.1*9.8 = 25.48
I believe you need to sin31 and set up an equation that compares the two frictional forces together to get an answer but I am having trouble setting it up.
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