1.The Gravitron is a carnival ride that spins up to 23 rpm (revolutions per minu
ID: 1272689 • Letter: 1
Question
1.The Gravitron is a carnival ride that spins up to 23 rpm (revolutions per minute) that appears to pin its passengers against padded seats at it rotates at high speed. If the Gravitron is 7.7 meters in radius, estimate the coefficient of friction of the padded seats.
2.
If the orbit of the earth around the sun is approximately circular, how much work (force parallel to motion times displacement) does the sun do on the earth in one year? Mass of earth ? 6.0x1024kg.
3.3x1034J
3.5x1022J
5.6x1036J
3.7x1013J
0
a.3.3x1034J
b.3.5x1022J
c.5.6x1036J
d.3.7x1013J
e.0
Explanation / Answer
1. 0
no friction needed as normal force will do.
2. W = F.ds
here F and ds are in perpendicular direction
so W=0
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