Question

An object accelerates from rest to a velocity 20m/sec in 4seconds.If  the   object  has uniform acceleration, find its acceleration and displacement in this time.

please answer right friends​

Answer 1

Explanation:

u=0

v=20

t=4

a=?

using first equation

v=u+at

20=0+a(4)

20=4a

20/4=a

5=a

ans is 5

have a nice day ahead

Answer 2

Answer:

$Initial \: velocity \: u = 0 \\ </p><p>Final \: velocity \: v = 20 m/s \\ </p><p>Time \: period t = 4 s \\ </p><p>Acceleration \: a = \frac{v - u}{t} \\ = \frac{20 \: m/s - 0}{4 \: s} \\ = 5 \: m/ {s}^{2} \\ \\ displacement \: = ut \: + \frac{1}{2} a {t}^{2} \\ = 0 \times 4s + \frac{1}{2} \times 5 \: m/ {s}^{2} \times {(4)}^{2} \\ = \frac{1}{2} \times 5 \: m/ {s}^{2} \times 16 {s}^{2} \\ = 40 \: m$