Points Possible: 100 Grade Category Exams A black is placed on a frictionless ra

Question

Points Possible: 100 Grade Category Exams A black is placed on a frictionless ramp at a height of above the ground. Starting from rest, the block slides Description down the ramp. At the bottom of the Exam ramp, the block slides onto a 10.5 m frictionless horizontal track without You can check your answers slowing down. At the end of the 18.5" horizontal track, the block slides You can view solutions after smoothly onto a second frictionless ramp, How far along the second ramp You have five attempts per q does the block travel before coming to a momentary stop, as measured along You lose 20% of the points av the incline of the ramp? answer in your question for e at that answer eTextbook o Help With This Topic After the block comes to a complete s on the second ramp, it will then begin back down the m, vertically, the ground? o Web Help Videos o Technical Support and Bug R Previous 2 Check Answer 0 Next Ext us l careers partners l privacy policy terms of use contact us help

Explanation / Answer

from energy conservation

Ei = Ef

m*g*h1 = m*g*L*sin18.5

L = h1/sin18.5 = 10.5/sin18.5 = 33.09 m

m*g*L*sin18.5 = m*g*h2 + 0.5*m*v^2

m*g*h1 = m*g*h2 + 0.5*m*v^2

v^2 = 2*g*(h1-h2)

v = sqrt(2*g*(h1-h2)

v = sqrt(2*9.8*(10.5-7.7))

v = 7.41 m/s

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