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Bagwati Lala
Asked: 2022-11-09T22:24:47+05:30 In:

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A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. `4sqrt5m//s`
B. `20sqrt2m//s`
C. `20sqrt3m//s`
D. `40m//s`

image
A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. `4sqrt5m//s`
B. `20sqrt2m//s`
C. `20sqrt3m//s`
D. `40m//s`
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  1. Correct Answer – D

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Tanay Nagi
Asked: 2022-11-09T15:15:52+05:30 In:

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A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. `0 m//s`
B. `20 sqrt(2) m//s`
C. `20 sqrt(3) m//s`
D. `40 m//s`

image
A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. `0 m//s`
B. `20 sqrt(2) m//s`
C. `20 sqrt(3) m//s`
D. `40 m//s`
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  1. Correct Answer – D
    (d) Area between curve and displacement axis
    =`(1)/(2) xx (12 + 4) xx 10 = 80 J`
    In this time the body acquired kinetic energy `= (1)/(2) mv^2` by the law of conservation of energy
    `(1)/(2) mv^2 = 80 J`
    `rArr (1)/(2) xx 0.1 xx v^2 = 80`
    `rArr v^2 = 1600`
    `rArr v = 40 m//s`.

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Gayatri Mahajan
Asked: 2022-11-09T12:20:36+05:30 In:

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A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. `0(m)//(s)`
B. `20sqrt2(m)//(s)`
C. `20sqrt3(m)//(s)`
D. `40(m)//(s)`

image
A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. `0(m)//(s)`
B. `20sqrt2(m)//(s)`
C. `20sqrt3(m)//(s)`
D. `40(m)//(s)`
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  1. Correct Answer – D
    `x=0` to `x=12m`
    `W=`area of F-x graph
    `=(1)/(2)(4+12)xx10=80J`
    `x=0`,`K_1=0`
    `W=K_2-K_1`
    `80=(1)/(2)mv^2-0=(1)/(2)xx0.1v^2`
    `v^2=1600impliesv=40(m)//(s)`

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Jayshree Shetty
Asked: 2022-11-08T16:24:41+05:30 In:

image
A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. 0m/s
B. `20sqrt(2)m//s`
C. `20sqrt(3)m//s`
D. `40m//s`

image
A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in figure. If it starts its journey from rest at `x=0`, its velocity at `x=12m` is
A. 0m/s
B. `20sqrt(2)m//s`
C. `20sqrt(3)m//s`
D. `40m//s`
Parabola
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1 Answer

  1. Correct Answer – D

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