Question

what is (1) average velocity between t=0 to t=10 sec in s-t graph . (2) what is velocity at t=10 sec (3) what is velocity at t=0?​

Answer 1

Answer:

Average veloity =

Total time

Net Displacement

So, area of velocity vs time graph gives the net displacement

Area =

2

1

×8×20 +

2

1

×2×(−2.5)

= 77.5

so, the area below the x-axis is taken to be negative because displacement can be negative

Then, average velocity =

10

77.5

= 7.75 m/s