Question

solve it pls
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I will mark the first ans as brainliest ​​

Answer 1

For first it will be 80×5 = 400 m/sec2

For second it will be 80×2.5= 200 m/second

Total distance would be = 0.5×400×100 + 4000×20+0.5×80×20×400 + similarly find out the velocity and use negative acceleration this time cause it is decelerating then you will get the whole distance Travelled

After getting the total distance divide It with the whole time Travelled you will get the answer

Answer 2

Answer:

answer is down below

Explanation:

i. vt = vo + a x t

80m/s = 0 + a x 10s

a = 80/10

a = 8m/s^2

ii. same formula like the one above

0 = 80m/s + a x 5s

-80/5 = a

a = -16m/s^2

iii. Total distance = the area of trapezoid

20s + 35s x 80m/s = 2200m

iv. Average Velocity = distance/time

2200/35 = 62.85m/s