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Grade: 12th pass

                        

A yo-yo falls to the bottom of its chord and then climbs back up. (a) Dose reverse its direction of rotation at the bottom? Explain your answer. (b) What pulls the yo-yo back to the top?

2 years ago

Answers : (1)

Arun
24738 Points
							
Dear student
 
I have made some points regarding Yo- yo
 
 
1) A yo-yo starts with gravitational potential energy.2) As it falls, the gravitational potential energy is converted intokinetic energy, both as linear momentum (momentum in a straight line)and angular momentum (momentum of rotation).3) At the end of the string, the angular momentum begins to dissipatedue to the friction between the axle and string.4) If the person tugs on the string after the yo-yo reaches thebottom, the axle can no longer slip within the string, and the angularmomentum of the spinning yo-yo causes the yo-yo to climb back up thestring.5) The kinetic energy (linear momentum and angular momentum) areconverted back to gravitational momentum as the yo-yo climbs back upthe string.
 
Regards
Arun (askIITians forum expert)
2 years ago
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