Question

A body start from rest. if it travels with an acceleration of 2m/s^2 , its displacement at the end of 3 second is .​

Answer 1

Answer: 9 m

Explanation:

S= ut+1/2 at^2

S= 0.3 + 1/2 *2*3^2

S= 0+ 9

Displacement = 9m

Answer 2

${s\:=\:ut\:+\:\frac{1}{2}\:a{t}^{2}}$

t = 3 s , a = 2m/s²

find = displacement .

${s\:=\:0\:×\:3\:+\:\frac{1}{2}\:×\:2\:×\:{3}^{2}}$

${s\:=\:0\:+\:\frac{1}{2}\:×\:2\:×\:9}$

${s\:=\:0\:+\:\frac{1}{2}\:×\:18}$

${s\:=\:0\:+\:\frac{1}{{\cancel{2}}}\:×{\cancel{\:18}}}$

${s\:=\:0\:+\:1\:×9}$

${s\:=\:9m/{s}^{2}}$