A disc is rotating with an angular speed of - If a child sits on it which of the following is conserved-

The correct option is D Angular momentumR.E.F image #160;child sits on the disc then there is #160; #160;a four paralleled to the axis so #160;No torque ...

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Standard XII

Physics

Angular Analogue of Linear Momentum

A disc is rot...

Question

A disc is rotating with an angular speed of $ω$ . If a child sits on it which of the following is conserved?

Kinetic energy

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Potential energy

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Linear momentum

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Angular momentum

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Solution

The correct option is D Angular momentum
R.E.F image
child sits on the disc then there is
a four paralleled to the axis so
No torque So $z = 0$
but $z = \frac{d J}{d t} \Rightarrow \frac{d J}{d t} = 0$
$\Rightarrow J =$ constant
angular momentum will
remain constant.

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A disc is rotating with an angular speed of ω. If a child sits on it which of the following is conserved?

The correct option is D Angular momentumR.E.F image child sits on the disc then there is a four paralleled to the axis so No torque So z=0but z=dJdt⇒dJdt=0⇒J= constant angular momentum will remain constant.

A disc is rotating with an angular speed of $ω$ . If a child sits on it which of the following is conserved?

The correct option is D Angular momentum
R.E.F image
child sits on the disc then there is
a four paralleled to the axis so
No torque So $z = 0$
but $z = \frac{d J}{d t} \Rightarrow \frac{d J}{d t} = 0$
$\Rightarrow J =$ constant
angular momentum will
remain constant.