Question

plzzzzzz answer guys i want with explanation​

Answer 1

Answer:

4) 0,21.4

Explanation:

Since its a round trip therefore net displacement is zero as final and initial position are the same and by the definition of displacement we know that

'displacement is the shortest distance between the final and initial positions'

which comes out to be zero in this case

Average speed=total distance covered/total time taken

total distance covered=lenght of arc QP + lenght of OQ+ lenght of OP

enght of OQ=lenght of OP=radius of circle= 1 km

Lenght of arc QP=2πr/4

(where r=radius of path)

=2π*1/4

=π/2 km

Total distance covered=π/2+1+1

=(π+4)/2

Total time taken=10 min

=1/6 hour

Plugging the above values in the equation of average speed we get

$Average \: speed={\frac{3.14 +4}{2}}*6\\=7.14*3\\=21.42km/hr$

Therefore the displacement and the average speed are 0 and 21.4 respectively.

Hope this helps.