- #1
MisterP
- 47
- 3
Homework Statement
Hello. I have slope = 45 degrees, at distance 36.4cm (0.364m) object gains 2m/s speed. Need to calculate friction coefficient. Correct answer is ( 0,2). How to calculate?
Homework Equations
1) t = s/v "t" - time; "s" - distance "v" - speed
2) S = (a*t2)/2 "S" - distance; "a" - acceleration; "t" - time (found this formula)
3) a = g(sin "angle" - mi*cos "angle") "a"-acceleration; "g" - gravity constant (9.81), "angle" = 45 degrees; mi - coefficient I need to find!
The Attempt at a Solution
So I used formulas: 1) to calculate time t = s/v = 0.364/2 = 0.182s
2) then to calculate acceleration.. S = (a*t2)/2 =
0,364 = (a*0.1822)/2 = 5.15m/s2
3)then to calculate "mi" ; 5.15 = 9.81(sin "45o" - mi*cos "45o") =
5.15 = 6.92 - mi*6.92; mi = 0.25
Anything right here? :D English is not my native so, please, try to express yourself as easy as You can, thank You :)