please check this link out to make it simpler to understand...
there is a friction block and a spring scale... it gives two measurements (the vertical force and the horizontal force)
Fvertical=88.2 N and
now i'm suppose to find the coefficient of friction...
and also, i'm suppose to find out if the driver exceeded the 70 km/h speed limit
please help me out!
m1vi1+m2vi2 = (m1+m2)vf
The Attempt at a Solution
for the mu:
at first, i tried to use the "elementary" method of summation of forces along the axes but since we're talking about collisions, i think i should use the work-energy theorem... but now i don't know how to put mu into the equation: KE=1/2(m)(v2)
for the speed limit:
well, it's an inelastic collision obviously... one car is at rest but they didn't give out the vi1 of the yellow car...
please help! i ran out of ideas on how to solve this!