Question

A body starts moving from rest and travels with uniform acceleration for 4 seconds and gains velocity 30 m/s. Then it continues to move with uniform velocity for 4 seconds. Then it starts retarding uniformly and comes to rest in further 2 seconds. The total covered distance by the body within the interval 4 s to 10 s is​

Answer 1

$\Large\mathtt\green{ }\huge\underline\mathtt\red{Answer : }$

From the question a  graph is drawn above,

Area of v−t graph⟹ distance travelled

vavg=t1+t2+t38s

21vm×t1=s

t1=vm2s

t2×vm=2s

t2=vm2s

21×t3×vm=5s

t3=vm10s

vavg=vm2s+vm2s+vm10s8s

vmvavg=74

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Answer 2

Answer:

it is the answer of 4 sec to 10 is 120 ms/s