Question and Answers Forum

All Questions      Topic List

Others Questions

Previous in All Question      Next in All Question      

Previous in Others      Next in Others      

Question Number 14297 by Tinkutara last updated on 30/May/17

Select the correct formulae for uniformly accelerated motion along a straight line (More than one option are correct) (1) v = u + at (2) s = (((u + v)/2))t (3) s = vt − (1/2)at^2 (4) s = ((v^2 − u^2 )/(2a))

$$\mathrm{Select}\:\mathrm{the}\:\mathrm{correct}\:\mathrm{formulae}\:\mathrm{for} \\ $$$$\mathrm{uniformly}\:\mathrm{accelerated}\:\mathrm{motion}\:\mathrm{along}\:\mathrm{a} \\ $$$$\mathrm{straight}\:\mathrm{line}\:\left(\mathrm{More}\:\mathrm{than}\:\mathrm{one}\:\mathrm{option}\right. \\ $$$$\left.\mathrm{are}\:\mathrm{correct}\right) \\ $$$$\left(\mathrm{1}\right)\:{v}\:=\:{u}\:+\:{at} \\ $$$$\left(\mathrm{2}\right)\:{s}\:=\:\left(\frac{{u}\:+\:{v}}{\mathrm{2}}\right){t} \\ $$$$\left(\mathrm{3}\right)\:{s}\:=\:{vt}\:−\:\frac{\mathrm{1}}{\mathrm{2}}{at}^{\mathrm{2}} \\ $$$$\left(\mathrm{4}\right)\:{s}\:=\:\frac{{v}^{\mathrm{2}} \:−\:{u}^{\mathrm{2}} }{\mathrm{2}{a}} \\ $$

Commented by Tinkutara last updated on 30/May/17

Thanks Sir!

$$\mathrm{Thanks}\:\mathrm{Sir}! \\ $$

Commented by tawa tawa last updated on 30/May/17

The question means, which of the following is not correct.

$$\mathrm{The}\:\mathrm{question}\:\mathrm{means},\:\mathrm{which}\:\mathrm{of}\:\mathrm{the}\:\mathrm{following}\:\mathrm{is}\:\mathrm{not}\:\mathrm{correct}. \\ $$

Commented by tawa tawa last updated on 30/May/17

It should be which one is In correct for a uniformely accelerated motion in a straight line.

$$\mathrm{It}\:\mathrm{should}\:\mathrm{be}\:\mathrm{which}\:\mathrm{one}\:\mathrm{is}\:\mathrm{In}\:\mathrm{correct}\:\mathrm{for}\:\mathrm{a}\:\mathrm{uniformely}\:\mathrm{accelerated}\:\mathrm{motion}\: \\ $$$$\mathrm{in}\:\mathrm{a}\:\mathrm{straight}\:\mathrm{line}. \\ $$

Commented by tawa tawa last updated on 30/May/17

So if more than one option is correct. All other answer is correct except for 3

$$\mathrm{So}\:\mathrm{if}\:\mathrm{more}\:\mathrm{than}\:\mathrm{one}\:\mathrm{option}\:\mathrm{is}\:\mathrm{correct}. \\ $$$$\mathrm{All}\:\mathrm{other}\:\mathrm{answer}\:\mathrm{is}\:\mathrm{correct}\:\mathrm{except}\:\mathrm{for}\:\mathrm{3} \\ $$

Commented by tawa tawa last updated on 30/May/17

1, 2, 4 are correct.

$$\mathrm{1},\:\mathrm{2},\:\mathrm{4}\:\mathrm{are}\:\mathrm{correct}. \\ $$

Commented by Tinkutara last updated on 30/May/17

But answer given is all are correct. How?

$$\mathrm{But}\:\mathrm{answer}\:\mathrm{given}\:\mathrm{is}\:\mathrm{all}\:\mathrm{are}\:\mathrm{correct}.\:\mathrm{How}? \\ $$

Commented by tawa tawa last updated on 30/May/17

it maybe typing error. s = ut + (1/2)at^2

$$\mathrm{it}\:\mathrm{maybe}\:\mathrm{typing}\:\mathrm{error}.\:\:\mathrm{s}\:=\:\mathrm{ut}\:+\:\frac{\mathrm{1}}{\mathrm{2}}\mathrm{at}^{\mathrm{2}} \\ $$

Commented by prakash jain last updated on 30/May/17

v=u+at s=vt−(1/2)at^2 =(u+at)t−(1/2)at^2 =ut+(1/2)at^2 (3) is also correct

$${v}={u}+{at} \\ $$$${s}={vt}−\frac{\mathrm{1}}{\mathrm{2}}{at}^{\mathrm{2}} =\left({u}+{at}\right){t}−\frac{\mathrm{1}}{\mathrm{2}}{at}^{\mathrm{2}} \\ $$$$={ut}+\frac{\mathrm{1}}{\mathrm{2}}{at}^{\mathrm{2}} \\ $$$$\left(\mathrm{3}\right)\:\mathrm{is}\:\mathrm{also}\:\mathrm{correct} \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com