Question

A car initially at rest, picks up a velocity of 72 kmph, over a distance of 25 m the acceleration of car is ………

Answer 1

Acceleration is 8m/s

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Answer 2

Aɴsᴡᴇʀ:

• The required acceleration of the car = 8m/s²

Gɪᴠᴇɴ:

• The Initial velocity of the car is 0 m/s.
• The Final velocity of the car is 72 km/hour = 20m/s.
• The distance travelled by the car is 25 m.

Nᴇᴇᴅ ᴛᴏ ғɪɴᴅ:

• The required acceleration of the car = ?

Solution:

Let the acceleration be a.

Now, Fᴏʀᴍᴜʟ ᴜsᴇᴅ ʜᴇʀᴇ:

• v² - u² = 2as

Pᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇs:

➦ 20² - 0² = 2 × a × 25

➦ 400 - 0 = 50a

➦ 50a = 400

➦ Acceleration = 400/50

➦ Acceleration = 8m/s²

Tʜᴇʀᴇғᴏʀᴇ:

• The required acceleration of the car is 8m/s².

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