A particle is moving in a circular path of radius r under action of a force F . If at an instant vel

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3-2.Motion in Plane

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A particle is moving in a circular path of radius $r$ under the action of a force $F$. If at an instant velocity of particle is $v$, and speed of particle is increasing, then

A$\vec{F} \cdot \vec{v} > 0$

B$\vec{F} \cdot \vec{v}=0$

C$\vec{F} \cdot \vec{v} < 0$

D$\vec{F} \cdot \vec{v} \geq 0$

Solution

(a)
Net force will be in the direction of net acceleration. Here accelerations are of two types
$(i)$ Centripetal
$(ii)$ Tangential
$\theta < 90^{\circ}$ always
$\Rightarrow \vec{F} \cdot \vec{V} > 0$

Standard 11

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(JEE MAIN-2024)

A particle is moving in a circular path of radius $r$ under the action of a force $F$. If at an instant velocity of particle is $v$, and speed of particle is increasing, then

Solution

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