In this part what does more than 1 jet mean?Watch

#1
I thought it's motion might have something to do with larger size, jagged edges and turbulent flow but mark scheme says this:

10 months ago
#2
(Original post by Presto)
I thought it's motion might have something to do with larger size, jagged edges and turbulent flow but mark scheme says this:

The question will always test your knowledge and understanding of a physical law. The correct answer must always refer to the appropriate law.

In this instance, it's Newton's laws: an object will stay at rest or continue it's motion in a straight line unless acted upon by an external force.

If the object is spinning, there must be a turning-moment causing it to do so (expelled gases produce a torque). But it stays in one position relative to it's container, meaning the force vectors are summed to balance themselves to produce no net vector in any translational direction.

Your answer gives valid reasons for the causes of the various force vectors operating, but it does not state that those vectors must be in balance to produce no net translational force vector.
1
#3
(Original post by uberteknik)
The question will always test your knowledge and understanding of a physical law. The correct answer must always refer to the appropriate law.

In this instance, it's Newton's laws: an object will stay at rest or continue it's motion in a straight line unless acted upon by an external force.

If the object is spinning, there must be a turning-moment causing it to do so (expelled gases produce a torque). But it stays in one position relative to it's container, meaning the force vectors are summed to balance themselves to produce no net vector in any translational direction.

Your answer gives valid reasons for the causes of the various force vectors operating, but it does not state that those vectors must be in balance to produce no net translational force vector.
Makes sense, thank you so much
10 months ago
#4
(Original post by Presto)
Makes sense, thank you so much
You are welcome.
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