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Sagot :
The average velocity in the first 45 seconds 3.11m/s and in the next 25 seconds is 3.6m/s and finally the average velocity for the entire trip is 3.28 m/s
What is average velocity?
The displacement of an object over time is its average velocity. We divide the distance traveled by the amount of time to determine an object's average speed. We are aware that velocity is a vector quantity, and that dividing displacement by time yields the average velocity.
What all is given and how will we solve this question?
1 ) 140 m to west in 45 seconds .
2 ) 90 m to east in 25 seconds .
The distance travelled by the balloon in first 45 s = 140 m
distance travelled by the balloon in next 25 s = 90 m
Total distance travelled by the balloon = 140 m + 90 m = 230 m
J ) average speed in first 45 s= distance in 45 s
= 140 ÷45 = 3.11 m /s
K ) average speed in next 25 s
distance in 25 s / 25
= 90÷ 25 = 3.6 m /s
L) average in entire trip
= total distance / total time
= (140 + 90) ÷( 25 + 45 )
= 3.28 m /s
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