Answer:
B) 35 W
Explanation:
Force applied by child = 75 N = F
Distance travelled by child = 42 m = d
Time traveled for is 1.5 min = 1.5×60 = 90 seconds = t
Work done by the child
W = Fdcosθ
⇒W = 75×42cos0
⇒W = 3150 Joule
Power is defined as work done per unit time
[tex]P=\frac{W}{t}\\\Rightarrow P=\frac{3150}{90}=35\ W[/tex]
∴ The average power generated by the child is 35 W
