Question

Total distance= s,+s2=20+160=180m
Total Time=2+4=6sec
s=ut+1/2 α+2
180=0×6+1/2×α[6]2
180=0+1/2×α×36=180=18α
α=10m/s2
v=u+at

10×7≈70m/s
hence the vilocity after 7 sec from the start is 70m/s.

Answer 1

Explanation:

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Answer 2

Answer:

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28is

Explanation:

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