Help with friction and no friction physics problem
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Help with friction and no friction physics problem

[From: ] [author: ] [Date: 11-06-14] [Hit: ]
assume that the blocks inital speed is 10 m/s, the height difference h is 2.9m and uk(its really mu or whatever that sign is) is .32.Find the distance d that the block travels on the higher level before stopping.Im having a really hard time trying to conceptualize this and then figure out the math.......
a small block slides along a track fro one level to a higher level by moving through a intermediate valley. the track is frictionless until the block reaches the higher level. there a friciontial force stops the block in a distance d. assume that the block's inital speed is 10 m/s, the height difference h is 2.9m and uk(its really mu or whatever that sign is) is .32. Find the distance d that the block travels on the higher level before stopping.

I'm having a really hard time trying to conceptualize this and then figure out the math.. and help would be great!

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let mass of blk = m

initial KE = 0.5 * m * 10^2

final PE gained = m * g * 2.9

work done by friction
= 0.32 * m g * d

conservation of energy
0.5 * m * 10^2 = m * g * 2.9 + 0.32 * m g * d

0.5 * 10^2 = g * 2.9 + 0.32 * g * d

d = 6.86m ---answer
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