h U: 5m C 45 D W: m 3h
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Body U with mass 5m is stacked on the top body W with
mass m, and released. The bodies are in contact along the
frictionless interface at 45 to the vertical. The body U is
in contact with the frictionless vertical wall. Body W lies
on the floor with coefficient of friction u. Relevant
dimensions are shown in the figure. Express the results in
terms of given quantities: m, g, h and u.
Let u =1/5. In initial configuration (shown), the velocities are zero. Find the
frictional force with the ground during the motion while the two bodies are in contact.
Let u = 1/5. In initial configuration (shown), the velocities are zero. Find the
velocities (direction and magnitude) of U and W at the instant when they separate (i.e., when the point C of U coincides with point D of W). Please use work-energy principle.
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