Question

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

Answer 1

Explanation:

Given,

initial velocity(u)=25m/s

time(t)=2sec

acceleration(a)=4m/s^2

So,s=ut+1/2at^2

S=25×2 + 1/2×4×2×2

Displacemnt =58m

Answer 2

Answer:

Displacement = 42m

Explanation:

Final velocity, v = 25 m/s

Initial velocity = u m/s

Time taken = 2s

Acceleration, a = 4ms-2

From equation,

v = u + at

we will get u as 17 m/s

and from equation,

v² = u² + 2aS

we will get

Displacement, S = 42 m