Question

A body moving along a straight line at 20m/s undergoes an acceleration of 4m/s*s. After 2 seconds what will be it's speed. Also find the displacement​

Answer 1

Hey there!

Given,

Initial velocity (u) = 20 m/s

Final velocity (v) = ?

Acceleration due to gravity (a) = 4 m/s²

Time (t) = 2 sec

From First Equation of Motion:

v = u + at

v = 20 + 4 * 2

v = 20 + 8

v = 28 m/s

And we know,

Velocity = displacement / time

i.e v = d / t

28 = d / 2

d = 28 * 2

d = 56 m

Hope It Helps You!

Answer 2

Explanation:

u= 20 m/s

a= 4 m/s^2

v = u + at = 20 + 4×2 = 28 m/s

V=d/t

D=28×2

D=56

Hope it will help you