Assume that the slide is frictionless (mu_k = 0): If Adam starts (at rest) at th
ID: 1435184 • Letter: A
Question
Assume that the slide is frictionless (mu_k = 0): If Adam starts (at rest) at the top of slide #1, and ends up taking off from the top of slide #2, use conservation of energy to decide which expression below gives Adam's speed v at take-off into the air from the smaller ramp. squareroot 2 gh_1, squareroot 2gh_2 squareroot g(h_1 - h_2) squareroot 2g(h_1 - h_2) squareroot 2g(h_2 - h_2) Present your reasoning. Compare Adam's mechanical energy at take-off from the smaller ramp with and without friction. Mechanical energy at take-off will be... smaller if the ramp has frcition... larger if the ramp has friction... the same, whether or not the ramp has friction... impossible to tell from the information given. Very briefly, explain your reasoning...Explanation / Answer
According to the conservation of energy= KE=PE
0.5*m*v^2= mg (h1-h2) where h1-h2 is the effective height
v^2 = 2g(h1-h2)
v=sqrt (2g(h1-h2)) (option D)
Mechanical energy is given as=KE+PE
if there is friction PE= larger but at the same point KE is smaller
Therfore, There will be no change, it remains the same (option C)