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anyone1979
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[SOLVED] Slide, I
I know I messed up on this problem somewhere, Please anybody help me figure out where.
A block of mass m = 1 kg slides down an inclined plane 2 m high and 4 m long(measured alond the incline). The coefficient of kinetic friction is uk = .07.
(a) What is the kinetic energy of the block when it reaches the bottom of the plane?
(b) The block continues to slide over a level plane with the same value of uk. How far does it go before coming to rest?
a) a = gsin(theta)
theta = arcsin(2/4) = 30 degress
a = (9.8)sin(30) = 4.9 m/s^2
Vf^2 = 0 + 2(4.9)(4)
Vf = 6.3 m/s
KE = 1/2(mVf^2)
KE = 1/2(1)(6.3)^2
KE = 19.8J
I can not figure out how to work in kinetic friction nor part b.
I know I messed up on this problem somewhere, Please anybody help me figure out where.
A block of mass m = 1 kg slides down an inclined plane 2 m high and 4 m long(measured alond the incline). The coefficient of kinetic friction is uk = .07.
(a) What is the kinetic energy of the block when it reaches the bottom of the plane?
(b) The block continues to slide over a level plane with the same value of uk. How far does it go before coming to rest?
a) a = gsin(theta)
theta = arcsin(2/4) = 30 degress
a = (9.8)sin(30) = 4.9 m/s^2
Vf^2 = 0 + 2(4.9)(4)
Vf = 6.3 m/s
KE = 1/2(mVf^2)
KE = 1/2(1)(6.3)^2
KE = 19.8J
I can not figure out how to work in kinetic friction nor part b.