Question

A car accelerates from rest to 20 m/s In 10 seconds. Determine the car’s acceleration.

Answer 1

Answer:

Depends on driver foot

Answer 2

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★ Gɪᴠᴇɴ :-

• Initial velocity = 0 m/s
• Final velocity = 20 m/s
• Time taken = 10 s

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★ Tᴏ Fɪɴᴅ :-

• Acceleration of the car = ?

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★ Sᴏʟᴜᴛɪᴏɴ :-

Finding acceleration using the first equation of motion .

» v = u + at

Here ,

• v → final velocity = 20 m/s
• u → initial velocity = 0 m/s
• a → acceleration = ?
• t → time taken = 10s

Note :-

• Here , the initial velocity ( u ) will be zero because the car is starting from rest .
• Here , the final velocity ( v ) will be 20 m/s because the car starts from rest and ends with 20 m/s.

Substituting the values we have,

⇒ 20 = 0 + a(10)

⇒ 20 = 10a

⇒ a = 20 ÷ 10

⇒ acceleration = 10 m/s²

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Hence , acceleration of the car = 10 m/s²

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