A loop of radius 3 meter and weighs `150kg`. It rolls along a horizontal floor so that its centre of mass has a speed of `15 cm//sec`. How much work h

Question

A loop of radius 3 meter and weighs `150kg`. It rolls along a horizontal floor so that its centre of mass has a speed of `15 cm//sec`. How much work h

A loop of radius 3 meter and weighs `150kg`. It rolls along a horizontal floor so that its centre of mass has a speed of `15 cm//sec`. How much work has to be done to stop it -
A. `3.375 J`
B. `7.375 J`
C. `5.375 J`
D. `9.375 J`

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
Required work `=` Total K.E.
`= 1/2 mv^(2) (1+(k^(2))/(R^(2)))`
`= 1/2 Mv^(2) [1+(k^(2))/(R^(2))]`
`= 1/2 xx 150 xx (0.15)^(2) (1+1)`
`= 3.375 J`

4 views Answered 2023-02-05 15:29