1. A block of mass 2.5 kg is used to compress a spring of spring constant 155 N/m
by 9.7 cm, as shown below. It is released and travels up the slope and stops right
at the very top. From the beginning to the top of the slope there is no friction. (a)
What is the height of the slope?
It then starts moving down the far side of the slope which is a rough surface
where the coefficient of kinetic friction between the block and slope is 0.35. At
the end of the slope it ends up at the same height it started from. (b) What is the
speed of the block right at the bottom of the slope? (c) How much further
beyond the slope will it travel before coming to a stop?

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2. You are playing marbles and flick marble A at 1.0 m/s toward stationary marble B
which has half the mass of marble A. Marble A hits B and moves at 0.33 m/s, at
an angle of 20.0° with respect to the original line of motion. Assuming no friction
or rotation motion find marble B’s velocity (including direction) after the

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