Question

when brakes are applied to a bus ,the retardation is 25 cm/s^2 .the bys takes 20 s to stop.find the initial velocity of the bus.

Answer 1

it is the right one dude hope it helps you

Answer 2

ʜᴇʟʟᴏ ᴍᴀᴛᴇ!

Here, a( acceleration ) = - 25 cm/s²

t ( time ) = 20s

v ( Final Velocity ) = 0

v = u + at

0 = u + (-25)(20)

0 = u - 500

500 cm/s² = u

Hence, initial velocity of bus was 500 cm/s

Hope it helps