Question

If A car starts from rest and attains a speed 20 metre per second in 25 seconds find the acceleration

Answer 1

hey dear
here is your answer

given data :

initial velocity = 0

final velocity = 20 m/s

time = 25 seconds

to find : acceleration

solution :

by using 1st equation of motion

v = u+at

20 = 0+25a

a = 20/25

a = 0.8 m/s²

hope it helps :)

Answer 2

✬ Acceleration = 0.8 m/s² ✬

Explanation:

Given:

• A car starts from rest (u) = 0 m/s
• Car attains speed (v) of = 20 m/s.
• Time taken by car (t) = 25 seconds.

To Find:

• What is the acceleration (a) of the car ?

Formula to be used:

• v = u + at

Solution: By using the first law of motion.

$\implies{\rm }$ v = u + at

$\implies{\rm }$ 20 = 0 + a $\times$ 25

$\implies{\rm }$ 20 = 0 + 25a

$\implies{\rm }$ 20 = 25a

$\implies{\rm }$ 20/25 = a

$\implies{\rm }$ 0.8 m/s² = a

Hence, the acceleration of the car is 0.8 m/s².

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➟ First law of motion = v = u + at

➟ Second law of motion = v = u + 1/2at²

➟ Third law of motion = v² – u² = 2as