Answer to Question #105237 in Mechanics | Relativity for Anika Roejkjaer

Question #105237
A boy of mass 40kg slides down a chute inclined at 30 degrees to the horizontal. If the chute is smooth and the boy starts from rest, with what velocity does he pass a point 5 m from the starting point?
1
Expert's answer
2020-03-13T10:48:49-0400

"mg\\sin\\alpha=ma"


"a=g\\sin\\alpha"


"S=\\frac{v^2}{2a} \\to v=\\sqrt{2gS\\sin\\alpha}="


"=\\sqrt{2\\cdot 9.81\\cdot 5\\cdot\\sin30\u00b0}=7" m/s. Answer









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