Question

if a car travels 15 m distance in 4 s with the acceleration of 5 m/s² . then what was its initial speed

Answer 1

Given:
S=15m—Displacement/Distance
T=4s
A=5m/s^2

Here we can use the formula :
S=ut+1/2 at^2.
15= 4x+1/2x20–Let x be initial velocity
15=4x+10
4x=15-10
4x=5
Therefore x=u=5/4
Hence the initial velocity is 5/4 m/s
Hope it helps.