Physics 203 Test 3.pdf

# Physics 203 Test 3.pdf - NAME Physics 203 Practice Test 3 1...

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NAME_______________________________ Physics 203 Practice Test 3 1) A centrifuge with a radius of .2m starts from rest and 10 seconds later is rotating at 20 revolutions per second. Calculate the angular speed, tangential speed, angular acceleration, tangential acceleration, and centripetal acceleration of the centrifuge at that moment. 2) A 50kg ladder of length 10m leans against a wall so that it makes an angle of 60 degrees with the ground. Calculate the horizontal normal force exerted by the wall on the ladder and the normal and friction force exerted by the ground on the ladder. 3) Consider 4 point masses, a 4kg mass located at (4,5) relative to the origin, a 6kg mass located at (-2,5), a 2kg mass at (-4,-1), and a 5kg mass at (2,2). Determine the location of the center of mass of the 4 masses. 4) A 15kg solid sphere with a moment of inertia described by 𝐼 = 2 5 𝑀𝑅 2 . It has a diameter of .5m. The sphere rolls without slipping across a horizontal surface with a velocity of 10m/s. Then it rolls up a slope until it stops. How far up the slope does the sphere roll?

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