Answer : The correct option is, (D) 4.5 m/s
Solution :
Formula used :
[tex]P=\frac{w}{t}=\frac{F\times d}{t}=F\times v[/tex]
where,
w = work done
t = time taken
d = displacement
P = power = 450 W
F = force = 100 N
Now put all the given values in the above formula, we get the velocity of the ball.
[tex]P=F\times v[/tex]
[tex]450W=(100N)\times v[/tex]
[tex]v=4.5m/s[/tex]
Therefore, the velocity of the ball is, 4.5 m/s
