Question

initial velocity of a body moving with uniform acceleration of 20cm /s2 is 45kg/hr calculate it's velocity after 25 sec

Answer 1

Your solution is in this image.

Answer 2

intial velocity =75 km hr

=45×5= 12.5m/s

acceleration (a) =20 cm 5s =0.25

so final velocity =12.5+ 0.2 ×25

12.5 +5=17.5ms

Hence17.5ms afre 25 sec