Pls Ans Fast !!

BITSAT 2015 Online › Mechanics questions › Pls Ans Fast !!

A spherical ball in hung in a string of length l and is kept in a car moving wid a velocity v. The car suddenly stops and the ball moves in a circular path. If T is the tension @ the highest pt. is twice the wt. of the ball, Find v and the vel. of the ball @ the highest pt.

#Physics #Mechanics

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6 Answers

11

Gone.. ·2009-04-29 10:06:21

sum1 pls do it...

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9

Celestine preetham ·2009-04-29 10:14:59

at highest pt

T +mg =mv²/l

3gl =v²

v at highest pt =√3gl

h=2l

vÂ°²=v²+2gh
=3gl +4gl =7gl

hence v at lowest pt =√7gl

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1

prateek punj ·2009-04-29 10:19:38

hey celes how can a ball in a car tied up with the ceiling can get vertical in circular motion...don't it will get shit with the roof of the car....

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9

Celestine preetham ·2009-04-29 10:23:40

u assume its a roofless car

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prateek punj ·2009-04-29 10:24:39

then with what it is hanging....

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11

Gone.. ·2009-04-29 10:32:06

i guess we assume car to be roofless.. :) thanks guys :)

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Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

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° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω