Answer:
a) The flea's speed when it leaves the ground is [tex]v=1.88m/s[/tex]
b) The flea move [tex]18cm[/tex] upward while it is pushing off
Explanation:
Hi
Knwons
Mass [tex]m=2.1\times 10^{-4} kg[/tex], Work [tex]W=3.7\times 10^{-4} J[/tex] and Force [tex]F=0.41N[/tex]
a) Here we are going to use [tex]W=\frac{1}{2} mv^{2}[/tex], so [tex]v=\sqrt{\frac{2W}{m} }= \sqrt{\frac{2(3.7\times 10^{-4} J)}{2.1\times 10^{-4} kg} }=1.88m/s[/tex]
a) Here we are going to use [tex]W=mgh[/tex], so [tex]h=\frac{W}{mg}= \frac{3.7\times 10^{-4} J}{(2.1\times 10^{-4} kg)(9.8m/s^{2})} =0,1797m[/tex] or [tex]18cm[/tex] approx.
