Question

A car accelerates from 15 m/s to 25 m/s in 5 seconds. Calculate its acceleration.

Answer 1

GIVEn

A car accelerates from 15 m/s to 25 m/s in 5 seconds.

TO FINd

Calculate the acceleration

SOLUTIOn

• Initial velocity = 15m/s
• Final velocity = 25m/s
• time taken = 5s
• Acceleration = ?

Apply this formula

→ v = u + at

→ 25 = 15 + a × 5

→ 25 - 15 = 5a

→ 5a = 10

→ a = 10/5 = 2 m/s²

Hence, acceleration of a car is 2 m/s²

Answer 2

$\bf{\red{\underline{\bf{Given \ :-}}}}$

• Initial Velocity (u) = 15 m/s

• Final Velocity (v) = 25 m/s

• Time (t) = 5 seconds

$\bf{\red{\underline{\bf{To \ Find \ :-}}}}$

• Acceleration (a)

$\bf{\red{\underline{\bf{Solution\ :-}}}}$

We know that,

$\implies \: Acceleration \: = \frac{Final \: velocity - Initial \: velocity}{Time \: taken} \\ \\ \implies \: a \: = \frac{v - u}{t}$

Put the above given values in it, We get,

$\implies \: a = \frac{25 - 15}{5} \\ \\ \implies \: a = \frac{10}{5} \\ \\ \implies \: a = 2 \: m {s}^{ - 2}$

Hence,

• Acceleration (a) = 2 m/s²