jellyfish sometime squeeze in the size of their bodies. this pushes a stream of water from the back end of their bodies. according to newtons third law of motion, how will this behavior affect the movement of the jellyfish? a. The jellyfish will move forward b. The inertia of the jellyfish will increase. c The jellyfish will move backward d. The jellyfish will stay still
Help help please
The jellyfish, which I suspect is actually a squid (I gather your teacher is not a fisherman), moves forward as the water moves aft. I suppose you could say that this is due to the third law (action---> equal magnitude opposite direction reaction). However I consider this a first law problem. There is no EXTERNAL force on the squid/water system. Therefore the momentum of the system does not change. If part of it moves aft, the other part must move forward to keep the total momentum constant.
To determine how the behavior of jellyfish squeezing their bodies and pushing water relates to Newton's third law of motion, we need to understand the concept behind the law.
Newton's third law of motion states that for every action, there is an equal and opposite reaction. In other words, when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object.
In the case of the jellyfish, when they squeeze their bodies and push water out, the action is the force exerted by the jellyfish on the water. According to Newton's third law, the reaction to this action is that the water exerts an equal and opposite force on the jellyfish.
Based on this, we can deduce that the jellyfish will experience a reaction force pushing it in the opposite direction to the water being expelled. Therefore, the movement of the jellyfish will be affected.
Considering the options given:
a. The jellyfish will move forward: This option aligns with Newton's third law, as the reaction force will push the jellyfish forward.
b. The inertia of the jellyfish will increase: Inertia is the resistance of an object to changes in its state of motion, but it is unlikely that this behavior would directly affect the jellyfish's inertia.
c. The jellyfish will move backward: This option contradicts Newton's third law, which states that the jellyfish will move in the opposite direction of the expelled water.
d. The jellyfish will stay still: This option contradicts Newton's third law, which guarantees that an equal and opposite reaction force will be experienced.
Therefore, the correct answer is a. The jellyfish will move forward.
Remember, to solve questions like these, apply the fundamental principles and concepts of physics, such as Newton's three laws of motion, to analyze and understand the situation.
The answer to the quiz is
C
D
C
A
D
B
C
A
I promise this is correct!