Question

Starting from rest acceleration of a partical is a=2(t-1) velocity of partical at t =5sec is

Answer 1

Answer:

8 m/s²

Explanation:

Given :

• Initial velocity = u = 0 m/s

• Time = t = 5 seconds

• Acceleration = 2(t-1)

To find :

• Acceleration of the particle in the 5th second

In this question, we have to just substitute the value of t = 5 in (2t-1) and then we will get the required answer

Acceleration in 5th second = 2(5-1)

Acceleration = 2(4)

Acceleration = 8 m/s²

The acceleration of the particle is 8 m/s² in the 5th second

Answer 2

Given:-

• Initial velocity = 0m/s

• Acceleration = 2(t-1)

• Time = 5 s

To Find:-

• Velocity of particle.

Solution :-

According to the question

By using this formula

➦ v = t² - 2t

➭ v = 5² - 2× 5

➭ v = 25 -10

➭ v = 15m/s.

∴The velocity of particle is 15m/s.