Question

1. A body is moving along a straight line at 20 ms-1
undergoes an acceleration of - 4 ms-2. After 2s, its
speed will be :
(A) 8 m s-1
(B) 12 m s-1
(C) 16 m s-2
(D) 28 ms-1
​

Answer 1

Answer:

c) 16ms-2

this is the correct answer

Explanation:

plz mark my answer as brainlist

Answer 2

$\huge {\textbf {\underline {\underline {ANSWER}}}}$

$\texybf {\underline {Given }}$

u = 20 m/s

a = - 4 m/s^2

t = 2 s

v = ?

$\textbf {\underline {TO \: FIND }}$

v = ?

$\textbf {\underline {SOLUTION}}$

a = v - u/t

- 4 = v - 20 /2

- 8 = v - 20

v = 20 - 8

= 12 m/s