Question

21. A car is travelling at a speed of 90 km/h. Brakes are applied so as to produce a
uniform acceleration of - 0.5 m/s2. Find how far the car will go before it is brought to
rest? *
O (a) 8100 m
O (6) 900 m
(c) 625 m
(d) 620 m​

Answer 1

Answer...

u= 90 km/h=25m/s

v=0/s

a=0.5m/s²

use 3rd equation of motion

v²=u²+2as

0=25²+2x0.5xs

0-625=-1xs

-s=-625

s=625m

Distance travelled is 625m....