In a golf tournament, if we designate the hole as the origin, and the putter (like a bat) is at - 5.0 m at time 0s, (as shown in the figure), what will be the average velocity of the ball when it reaches the hole ?
A
+5ms−1
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B
−1ms−1
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C
+1ms−1
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D
−5ms−1
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Solution
The correct option is C+1ms−1 Here, initially at t = 0s, the distance from the origin is 5m. At t = 5s, the ball reaches the origin. Now, Averagevelocity=TotaldisplacementTotaltimetaken
Total displacement = (0−(−5))=5m Total time taken = 5 sec Hence, Averagevelocity=+55=+1ms−1