Question

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. $+5m{s}^{-1}$
• B. $-1m{s}^{-1}$
• C. $+1m{s}^{-1}$
• D. $-5m{s}^{-1}$

Answer 1

The correct option is C $+1m{s}^{-1}$

Here, initially at t = 0s, the distance from the origin is 5m.
At t = 5s, the ball reaches the origin.
Now,
$Averagevelocity=\frac{Totaldisplacement}{Totaltimetaken}$

Total displacement = $(0-(-5\left)\right)=5m$
Total time taken = 5 sec
Hence,
$Averagevelocity=\frac{+5}{5}=+1m{s}^{-1}$