Question

a body starts from rest and accelerate the car with 4m/s square acceleration . find its speed after 4 sec​

Answer 1

Given:-

• Initial velocity ,u = 0m/s
• Acceleration ,a = 4m/s²
• Time taken ,t = 4 s

To Find:-

• Final velocity ,v

Solution:-

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀According to the Question

It is given that the body starts from rest & accelerate the car with 4m/s². We have to calculate the final velocity of the car . So using 1st equation of motion

• v = u + at

where,

• v denote final velocity
• u denote initial velocity
• a denote acceleration
• t denote time taken

Substitute the value we get

$:\implies$ v = 0 + 4×4

$:\implies$ v = 16 m/s

• Hence, the final velocity of the body is 16m/s.

Answer 2

Given :-

A  body starts from rest and accelerate the car with 4m/s square acceleration .

To Find :-

Velocity after 4 second

Solution :-

We know that

a = v - u/t

4 = v - 0/4

4 × 4 = v - 0

16 = v - 0

16 + 0 = v

16 = v

Hence,

Final velocity is 16 m/s