Question

Plss solve the circled ones

Answer 1

for q10
since velocity changes at a constant rate
therefore using v=(v2-v1)/2
v=(v2-v1)/2
v=(15-10)/2
v=5/2m /s
therefore v=2.5m/s
using acceleration a=v/t
a=v/t
a=2.5/2
a=1.25m/s²

for q12
the slope of displacement -time graph gives the velocity of the body.
therefore greater the slope, greater is the speed and lesser the slope lesser is the speed.
therefore B travels faster than A.