Physics help with magnitude of net work done. 2) Suppose the block from the prev
ID: 1591231 • Letter: P
Question
Physics help with magnitude of net work done. 2) Suppose the block from the previous question is launched with the same initial speed Vo on the following frictionless ramps. In each case, state whether the magnitude of the net work done on th block from the bottom to the top of the ramp is greater than, less than, or equal to the magnitude of the work done on the block in Question 1. Explain your answer in each case. Case a: the ramp is steeper ( > ) Case b: the ramp has two sections of different slope Case c: the ramp is curved greattr thanExplanation / Answer
a)
Work done = Fg*L
W = m*g*sinalpha*L = m*g*h
b)
W = m*g*sinalph*L1 + m*g*singamma*L2
L1 *sinalpha = h1
L2 *singamma = h2
h1+h2 = h
W = m*g*(h1+h2) = m*g*h
c)
dW = m*g*dh
W = integration dw
w = m*g*h