Question

2. A body moves with a velocity of
10 m/s for 10 s and then with a velocity of
20 m s in the same direction for 40 s. Find its
average velocity.
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Answer 1

1st velocity=10m/s

time=10s

2nd velocity=20m/s

time=40s

Average velocity=Total distance/total time

(10×10+20×40)/40+10

100+800/50

900/50

18m/s

Thus,the average velocity is 18m/s

Answer 2

Answer:

u=10

v=20

t1=10

t2=40

avg v= total displacment/total time

= displacment 1 = 10x10=100 m

dispacment 2 = 20x40=800 m

avgspeed= 900/50= 18m/s