posted by mary on .
a mass is released from rest from a height of 4m. it slides down a frictionless ramp then along a 20 degree incline section of rough track. how far does it slide along the incline before coming to rest?
friction coeficient= .2
The first thing is to figure the height it fell.
Let the ramp be length L along the sliding service, and d the distance it slid.
Final height h= (L-d)/cos20
height it fell then total is
energy used in stopping is
so, using energy...
so solve for d. You didn't mention L, the length of the ramp, but you have to have it.