Question

a car aquires the velocity of 72 km/h in 10sec starting from rest a] acc. b] average speed c] distance travelled

Answer 1

Explanation:

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Answer 2

$\huge\sf\purple{✭Qᴜᴇsᴛɪᴏɴ}$

A car aquires the velocity of 72 km/h in 10sec starting from res. Calculate :

a) Acceleration

b) Average speed

c) Distance travelled

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$\huge\underline\red{Given,}$

☆ Initial Velocity u = 0

☆ Final Velocity v = 72 km/h

$⇒ \frac{72 \times 1000 \: m}{60 \times 60s } ⇒ 20 \: m/s$

☆Time taken t = 10 s

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✰ i) Aᴄᴄᴇʟᴇʀᴀᴛɪᴏɴ

$: ↦ a = \frac{v - u}{t}$

$:↦ \frac{(20 - 0)m/s}{10 \: s}$

$:↦ 2 \: m/s²$

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✰ ii) Aᴠᴇʀᴀɢᴇ Vᴇʟᴏᴄɪᴛʏ

$:↦ \frac{0 + 20}{2} \: ms \:$

$:↦10 \: m/s$

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✰ iii) Dɪsᴛᴀɴᴄᴇ Tʀᴀᴠᴇʟʟᴇᴅ

${S \: = \:average\: velocity × time}$

$:↦(10 \: ms \: ) \times (10 \: s)$

$:↦100 \: m$

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