ACCELERATION
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MOTION IN A STRIGHT LINE

269801 An express train moving at\(30 \mathrm{~m} / \mathrm{s}\) reduces its speed to \(10 \mathrm{~m} / \mathrm{s}\) in a distance of \(240 \mathrm{~m}\). If the breaking force is increased by \(12.5 \%\) in the beginning find the istance that it travels before coming to rest

1 \(270 \mathrm{~m}\)
2 \(240 \mathrm{~m}\)
3 \(210 \mathrm{~m}\)
4 \(195 \mathrm{~m}\)
MOTION IN A STRIGHT LINE

269802 For motion of an object alongthex-axis, the velocity \(v\) depends on the displacement \(x\) as \(v=3 x^{2}-2 x\), then what is the acceleration at \(x=2 m\).

1 \(48 \mathrm{~ms}^{-2}\)
2 \(80 \mathrm{~ms}^{-2}\)
3 \(18 \mathrm{~ms}^{-2}\)
4 \(10 \mathrm{~ms}^{-2}\)
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MOTION IN A STRIGHT LINE

269801 An express train moving at\(30 \mathrm{~m} / \mathrm{s}\) reduces its speed to \(10 \mathrm{~m} / \mathrm{s}\) in a distance of \(240 \mathrm{~m}\). If the breaking force is increased by \(12.5 \%\) in the beginning find the istance that it travels before coming to rest

1 \(270 \mathrm{~m}\)
2 \(240 \mathrm{~m}\)
3 \(210 \mathrm{~m}\)
4 \(195 \mathrm{~m}\)
MOTION IN A STRIGHT LINE

269802 For motion of an object alongthex-axis, the velocity \(v\) depends on the displacement \(x\) as \(v=3 x^{2}-2 x\), then what is the acceleration at \(x=2 m\).

1 \(48 \mathrm{~ms}^{-2}\)
2 \(80 \mathrm{~ms}^{-2}\)
3 \(18 \mathrm{~ms}^{-2}\)
4 \(10 \mathrm{~ms}^{-2}\)
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