Q.

The v-x graph for an airplane travelling on a straight run-way is shown.The acceleration of the plane at  x=50m and x=150m respectively are
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a

8ms2,3.5ms2

b

4ms2,4.5ms2

c

6ms2,4.5ms2

d

8ms2,4.5ms2

answer is C.

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Detailed Solution

At  x=50m.
Since  a=dvdt=vdvdx
a=(20)(40100)=8  ms2
At  x=150  m
a=dvdt=vdvdxa=(45)(10100)=4.5ms2
 

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