Question

A body is travelling with a velocity 30m/s . It is given an acceleration 5m/s . What will be its velocity after 4s


please answer step by step​

Answer 1

☞Given :

➨ Initial velocity = 30m/s

➨ Acceleration = 5m/s²

➨ Time interval = 4s

☞To Find :

➠ Final velocity of body after the given interval of time.

☞Solution :

➝ Acceleration is defined as the rate of change in velocity.

➝ It is a vector quantity having both magnitude as well as direction.

➝ It can be positive, negative or zero.

➝ SI unit : m/s²

✷ First equation of kinematics :

⇒ a = (v - u) / t

⇒ v = u + at

⇒ v = 30 + (5 × 4)

⇒ v = 30 + 20

⇒ v = 50m/s

Answer 2

⇒ a = (v - u) / t

⇒ v = u + at

⇒ v = 30 + (5 × 4)

⇒ v = 30 + 20

⇒ v = 50m/s