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Question

A small disc is set rolling with a speed v on the horizontal part of the track from the lower part of tack to upper part as shown in figure. To what height will it climb up the curved part?
694609_3facd1809f814d14b7a88b8cd96eb03d.png

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Solution

A disc is set rolling with a velocity V form right to left to left it has attained
For pure rolling We know that, V=Rw w=VR

Now we apply energy conservation equation,
Therefore (1/2) mV2+(1/2) lω2=mgh

(1/2)mV2+(1/2)×(1/2)mR2ω2=mgh

(1/2)V2+1/4V2=gh(3/4)V2=gh

h=34×V2g

1568195_694609_ans_29e0fc7e186043f39b1d659dcb970dc0.png

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