Question

particle initially at rest moves with an uniform acceleration of 10m/s and attains a velocity of 90m/s after some time .the time taken to travel a distance of 45 m is

Answer 1

Explanation:

uniform velocity, u= 0m/s

final velocity, v= 90m/s

acceleration, a= 10m/s²

distance, s=45m

time,t= ?

s= ut+½at²

45= (0×t)+(½× 10×t)

45 = ½×10t²

45×2= t²

90/10 =t²

root 9 = t

3 = t