Question

- A car starts from rest and has a uniform
acceleration of 2m/s. Find the speed of car after 5s
​

Answer 1

Given :

• Acceleration (a) = 2 m/s²

• Time (t) = 5 s

To calculate :

• Speed of the car after 5 s (v).

Calculation :

Since,the car was at rest so the initial velocity (u) of the car is 0.

____________________________

By using the first equation of motion,

★ v = u + at

• v denotes final velocity
• u denotes initial velocity
• a denotes acceleration
• t denotes time

Substituting values,

→ v = 0 + 2(5)

→ v = 0 + 10

→ v = 10

Therefore, the speed of car after 5s is 10 m/s.

Some more formulae :

First equation of motion :

• v = u + at

Second equation of motion :

• s = ut + ½at²

Third equation of motion :

• v² - u² = 2as

Where,

• v denotes final velocity

• u denotes initial velocity

• a denotes acceleration

• s denotes distance

• t denotes time