Question

a body starts from rest and uniformly accelerated for 10s so that its velocity becomes 100 m/s .it then maintains this speed for 10 more seconds .its average velocity for this 20 seconds is?

Answer 1

CASE 1 : a is uniform. CASE 2: u is uniform
u = 0m/s. a=0m/s²
t¹= 10s. t²= 10 s
v=100m/s. u= 100 m/s

v = u+ at. v= 100+ 10×10
100= 0+a× 10. v= 200m/s
a = 10m/s²