There is a species of Darwin’s finch on the Galapagos Islands that can exert a force of 205N with its beak as it cracks open a seed case. If its beak moves through a distance of 0.40 cm during this operation, how much work does the finch do to get at the seed inside the case?

0.82 J

Explanation:

We know that work done W = Fd where F = force and d = distance moved in the direction of the force.

Now, the finch on Galapagos Islands exerts a force of 205 N with its beak as it cracks open a seed case. So, F = 205 N. If the beak moves a distance of 0.40 cm during this operation, then d = 0.40 cm = 0.004 m.

We now compute W.

So, W = Fd

= 205 N × 0.004 m

= 0.82 J

So the finch does work of 0.82 J to get at the seed inside the case.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.