Squid and Octolules are propelled by expelting water, which is maintained in a body cavity. A squid of 6.5 kg (including water i
n the cavity) is at rest, when suddenly a predator is spotted.
A) If the squid has 1.6 kg of water in its cavity, how fast should it expel this water so that it reaches 2.5 m/s and escapes the predator? What is the kinetic energy of the squid after this maneuver?
A) If the squid has 1.6 kg of water in its cavity, how fast should it expel this water so that it reaches 2.5 m/s and escapes the predator? What is the kinetic energy of the squid after this maneuver?
1 answer:
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Well, the acceleration is the difference of speeds divided by the time period. 
.
One rev/s is
, so our final result is 
.
One rev/s is
Good morning.
We see that
The magnitude(norm, to be precise) can be calculated the following way:
Now the calculus is trivial:
We see that
The magnitude(norm, to be precise) can be calculated the following way:
Now the calculus is trivial: