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प्रश्न
A disc of radius 5 cm rolls on a horizontal surface with linear velocity v = 1`hat"i"` m/s and angular velocity 50 rad/s. Height of particle from ground on rim of disc which has velocity in vertical direction is ______ cm.
पर्याय
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MCQ
रिकाम्या जागा भरा
उत्तर
A disc of radius 5 cm rolls on a horizontal surface with linear velocity v = 1`hat"i"` m/s and angular velocity 50 rad/s. Height of particle from ground on rim of disc which has velocity in vertical direction is 3 cm.
Explanation:
v = Rω cosθ
⇒ cosθ = `"v"/("R"omega)`
= `2/5` cm
∴ h = R(1 – cosθ) = 3 cm.
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