Question

A body attains a velocity of 25ms-1 in 2s with acceleration of 4ms-2the displacement of body is

Answer 1

First find initial velocity of body
u = v - at
= 25 m/s - (4 m/s² × 2 s)
= 17 m/s

Now,
Use equation of motion
v² - u² = 2aS

S = v² - u² / (2a)
= [(25 m/s)² - (17 m/s)²] / (2 × 4 m/s²)
= 42 m

∴ Displacement covered by body is 42 m