Ramp Smooth Ground
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Ramp Smooth Ground
physics work and energy! i need help i have a test tomorrow!?
two boxes each of mass 12 kg are raised 1.8m to a shelf. the First one is lifted and second is pushed up a smooth ramp. If the applied force on the second box is 48N, calculate the angle between the ramp and the ground.
there is no friction - smooth
upward push = downward acceleration
F = mg sin (p) = 48 N
sin (p) = 48/(12*9.8) = 0.4082
p = angle = 24.09 degree
or 24.1 degree
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other box --lifted
force = mg = 12*9.8 = 117.6 N
work done = 117.6*1.8 = 211.68 J
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ramp box -- work done
= mg sin p * L = mh [h/L}*L = mg*h = 211.8 J
same when no friction>>> but its not possible
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