Question

A car takes 6s to increase its velocity from 20m/s to 50 m/s. What is its average
acceleration?

Answer 1

Answer:

5 metre per second square.

Explanation:

We know,

Velocity = acceleration x time,

v = at                                      (iii)

According to question,

Velocity = 50 m/s - 20 m/s.

v = 30 m/s.                               (i)

time = 6 s.                                (ii)

Put values from (i) and (ii) in (iii),

30 = a x 6

30/6 = a

5 metre per second square = acceleration.

Answer 2

Given :

• Initial velocity (u) = 20 m/s

• Final velocity (v) = 50 m/s

• Time interval (t) = 6 s

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To Find :

• Acceleration

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Solution :

Use 1st equation of motion :

⇒v = u + at

⇒50 = 20 + a * 6

⇒6a = 50 - 20

⇒6a = 30

⇒a = 30/6

⇒a = 5

➜ Acceleration of body is 5m/s²