Question

if a car travels 50m distance in 4s with acceleration of 5m/s^2 then what was its initial velocity?

Answer 1

Hey Mate,

Here Is Your Answer

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simple method would be to use S=ut+½at²…second method (but this is some what lengthy)

a=(v-u)/t

5=(v-u)/4

v-u =20…(1)

third equation of motion ,v²=u²+2aS

v²-u²=2aS

(v+u)(v-u)=2*5*50

(v+u)*20=10*50 (using eq 1)

v+u =25…..(2)

subtract eq2-eq1,

v+u-v+u=25–20

2u=5

u=2.5

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Hope It Helps You.

Answer 2

HOPE IT WILL HELP YOU..... ☺☺!!