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Grade: 10
        
a coin is tossed by a machine attached to the ground.The radius of coin is 1cm.If it is tossed with tails side facing upwards can you judge the outcome if its speed is 1 whole 360 revolution per second 
(neglect air resistence)
 
2 years ago

Answers : (1)

Taral Jain
39 Points
							They are indeed rotating due to gravity. If there was no gravitational attraction they would each fly off away from each other. As you correctly point out, there is no torque and therefore the angular momentum is conserved. Since there is no external forces, the center of mass must be moving at constant velocity and therefore cannot be rotating. The only way this can happen is if the rotation has the center of mass as its axis. Since they are separated a length l, the center of mass would be xcm=lMm+M from the smaller mass m. Now, there is a constant force on m which is F=GmMl2Hope you will it now!!
						
2 years ago
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