A 30 kg boy on a 5 kg sled takes a running start from the top of a slippery hill, moving at 4.00
m/s. The hill is 60 m long at an angle of 11.5 degrees above the horizontal. The boy and sled
reach the bottom of the hill moving at 10.0 m/s. (a) How much mechanical energy...
Two hockey pucks of equal mass undergo a collision
on a hockey rink. One puck is initially at rest, while
the other is moving with a speed of 5.4 m/s. After the
collision, the velocities of the pucks make angles of
33° and 46° relative to the original velocity of the...
The highest waterfall in Canada is the Della Falls in British Columbia, with a change
in elevation of 4.4 102 m. When the water has fallen 12% of its way to the bottom,
its speed is 33 m/s. Neglecting air resistance and fluid friction, determine the speed
of the water...