Adolphin experiences a force of 320 n [u] when it jumps out of the water. the acceleration of the dolphin is 2.60 m/s2 [u]. a) calculate the mass of the dolphin. b) what would be the acceleration of the dolphin if it had the same strength but half the mass?

a) The mass of the dolphin can be calculated by using Newton's second law:

where

F=320 N is the force experienced by the dolphin

m is the dolphin mass

is the acceleration of the dolphin

Rearranging the equation and substituting the numbers, we find the mass of the dolphin:

b) If the mass of the dolphin is halved, the new mass is:

And by using again Newton's second law, we can find the new acceleration of the dolphin:

so, the acceleration is twice the original acceleration.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

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