A ring and a disc roll on the horizontal surface without slipping, with same linear velocity. If bolh have same mass and radius and total kinetic ener

Question

A ring and a disc roll on the horizontal surface without slipping, with same linear velocity. If bolh have same mass and radius and total kinetic ener

A ring and a disc roll on the horizontal surface without slipping, with same linear velocity. If bolh have same mass and radius and total kinetic energy of the ring is 4 J, then total kinetic energy of the disc is
A. 3J
B. 4J
C. 5J
D. 6J

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
`(KE_(disc))/(KE_("ring"))=((1)/(2)mv^(2))/((1)/(2)mv^(2))([1+K^(2)//R^(2)]_(disc))/([1+K^(2)//R^(2)]_("ring"))`
`=(1+(1)/(2))/(1+1)=((3)/(2))/(2)=(3)/(4)`
`K(E)_(disc)=(3)/(4)KE_("ring")=(3)/(4)xx4=3J`

4 views Answered 2023-02-05 15:29