Question

You pull straight up on the string of a yo-yo with a force 0.19 N, and...

You pull straight up on the string of a yo-yo with a force 0.19 N, and while your hand is moving up a distance 0.14 m, the yo-yo moves down a distance 0.29 m. The mass of the yo-yo is 0.057 kg, and it was initially moving downward with speed 2.2 m/s.


(a) What is the increase in the translational kinetic energy of the yo-yo?

ΔKtrans=  J


(b) What is the new speed of the yo-yo?

vf=  m/s


(c) What is the increase in the rotational kinetic energy of the yo-yo?

ΔKrot=  J
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