Question

A tadpole swims across a pond at 8.50 cm/s. The tail of the tadpole exerts a force of 28.0 mN to overcome drag forces exerted on the tadpole by the water.

What is the power output?

Can someone explain me, please!

Answer 1

2.38 mW

Step-by-step explanation:

Power is work per unit time. Work is the product of force and distance. That means ...

`\text{power}=\frac{\text{force}*\text{distance}}{\text{time}}=\text{force}*\frac{\text{distance}}{\text{time}}\\\\\text{power}=\text{force}*\text{velocity}`

Using the given values of force and velocity, the tadpole's power output is ...

P = (0.028 N)(0.085 m/s) = 0.00238 W = 2.38 mW

The tadpole's power output is about 2.38 mW.