In: Physics
Question 1-
In a bizarre way to test the speed of a clay ball shot from a
slingshot, a wooden block is set up outside the lab on the
concrete. The sticky clay ball has a mass of 10.0 g and is hurled
perfectly horizontally by a man with his slingshot at a 90 g wooden
block initially at rest on the concrete, a compete horizontal
surface. The clay sticks to the block. After impact, the block
slides 7.50 m before coming to rest. If the coefficient of friction
between block and surface is 0.650, what was the speed of the clay
(in m/s) immediately before impact?
m/s
Question 2-
In the sport of speed skating, the top athletes experience
centripetal acceleration of approximately 0.65 g (meaning the
centripetal force is about 65% of their weight). If the radius of
the inner lane is about 22.6 meters, how fast are the skaters
going?
m/s