Question

A car accelerates from 5 ms to 13 ms in 4.0 s. What is acceleration in ms2?​

Answer 1

Given :-

• Initial velocity (u) = 5m/s
• Final velocity (v) = 13m/s
• Time taken (t) = 4.0m/s

To find :-

• Acceleration (a)

Solution :-

According to the first equation of motion

→ v = u + at

→ 13 = 5 + a*4

→ 13 - 5 = 4a

→ 8 = 4a

→ a = 8/4

→ a = 2m/s²

Hence,

• Acceleration of a car is 2m/s²

Extra Information

• s = ut + ½ at² (second equation of motion)
• v² = u² + 2as (third equation of motion)
• S.I unit of acceleration is m/s²
• S.I unit of time is second

Answer 2

☃ GIVEN :-

• Initial Velocity[u] = 5m/s

• Final Velocity[v] = 13m/s

• Time[t] = 4 seconds.

☃ TO FIND :-

• Acceleration[a].

☃ SOLUTION :-

We can use First Equation Of Motion.

Which is,

v = u + at.

So, Put the values.

➝ 13 = 5 + 4a.

➝ 4a = 13 - 5.

➝ 4a = 8.

➝ a = 8/4.

➝ a = 2.

Hence, Acceleration = 2m/s².