Question

An object travel 16m in 4s and then another 16m in 2s . What is the average speed of the object?​

Answer 1

the average speed = total distance travelled /total time

av.speed= 16+16/4+2

=32/6

= 5.33 m/s

Answer 2

$\red \bigstar{ \underline { \underline { \bf{↬ \pink{ GiVeN}↫}}}} \purple \bigstar$

• An object travels 16 metre in 4 seconds .

• Then again it travels 16 metre in 4 seconds .

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$\blue\bigstar{ \underline { \underline { \bf{↬ \red{ To \: FiNd}↫}}}} \green \bigstar$

• Average speed of the object, (v) ↠ ?

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$\purple\bigstar{ \underline { \underline { \bf{↬ \green{ ForMuLa \: ReQuiReD}↫}}}} \pink \bigstar$

$\small \green\bigstar {\underline {\boxed { \bf {s = v \times t }}}} \red\bigstar$

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$\small \sf Total \: distance \: travelled, \bf (s) \sf \:$

$\small \tt ⇢16 \: m + 16 \: m$

$\small \tt ⇢ \boxed{ \bf 32 \: m}$

$\small \sf Total \: time \: taken, \bf (t) \sf \:$

$\small \tt ⇢4 \: s + 2 \: s$

$\small \tt ⇢6 \: seconds$

$\small \sf \: We \: know,$

$\small \green\bigstar {\underline {\boxed { \bf {s = v \times t }}}} \red\bigstar$

$\small \sf ⟹ \: 32= \: v \times 6$

$\small \sf ⟹ \: v \times 6=32$

$\small \sf ⟹ \: v= \frac{ \cancel{32} \: metre}{ \cancel6 \: seconds}$

$\small \sf ⟹ \: v= \frac{16 \: metre}{3 \: seconds}$

$\small \sf ⟹ \:{ \boxed {\sf {v=5.33 \: \: m/sec}}}$

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$\pink\bigstar{ \underline { \underline { \bf{↬ \purple{ ExpLore \: MoRe \: ForMuLa}↫}}}} \green \bigstar$

• $\small \green\bigstar {\underline {\boxed { \bf {s = v \times t }}}} \red\bigstar$

where ,

• s ➟ distance

• v ➟ speed

• t ➟ time taken

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$\small \green\bigstar {\underline {\boxed { \bf {v=u + at}}}} \red\bigstar$

where,

• u ➟ Initial velocity

• v ➟ Final velocity

• a ➟ Acceleration

• t ➟ time taken

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$\small \green\bigstar {\underline {\boxed { \bf {s=ut + \frac{1}{2}at {}^{2} }}}} \red\bigstar$

where,

• s ➟ distance

• u ➟ Initial velocity

• t ➟ time taken

• a ➟ Acceleration

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$\small \green\bigstar {\underline {\boxed { \bf {2as=v {}^{2} - {u}^{2} }}}} \red\bigstar$

where,

• a ➟ acceleration

• s ➟ distance

• v ➟ final velocity

• u ➟ initial velocity

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