A block of mass m is being held at rest at the top of a ramp of height, h = 3.0 m. The ramp makes a 30⁰ with the horizontal. Physics Help?
A block of mass m is being held at rest at the top of a ramp of height, h = 3.0 m. The ramp makes a
30⁰ with the horizontal. If the coefficient of kinetic friction, 𝜇𝑘 = 0.2
a) Determine the length of the ramp
b) Determine an expression for the energy before and the energy after. I.e. state all the different
energies before and after. (Hint: work is done)
c) Solve for the final velocity of the block at the bottom of the ramp.
- Old Science GuyLv 71 month agoFavourite answer
sin 30 = h/L = 3.0 / L
L = 6.0 m
GPE = Work + KE
m g h = (mu m g cos30)*L + 1/2 m v^2
9.81(3.0) = (0.2*9.81*cos30)*6.0 + 1/2 v^2
v^2 = 6.2 m/s
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