In Figure 8-50, a block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level, where a frictional force stops the block in a distance d. The block's initial speed v0 is 6.0 m/s, the height difference h is 0.9 m, and the coefficient of friction µk is 0.60. Find d

Question

i wounder if the velocity of the particle slows at all while it slides down the frictionless track. also i wounder of how to calculate the velocity lost during the little incline before the frictional part of the track

Answer 1

Do this with energy.

Initial KE=changein PE+ workdoneby friction

1/2 mvo^2=mgh+ mu*mg*distance

notice m divides out, so solve for d.

Answer 2

i did the calculations and i got 15.3 meters
but it says its wrong

Answer 3

ooooo i got it now

thank you thank you thank you