What is Newton's First Law of Motion?

AI Thread Summary
Newton's First Law of Motion states that an object with no net force acting on it remains at rest or in motion with a constant velocity. The discussion confirms that the correct answer to the question is D. First. Participants express confusion about why clarification was needed when the law is clearly defined. The conversation highlights the importance of understanding basic physics concepts. Overall, the inquiry reinforces the foundational principles of Newton's laws.
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14. According to Newton’s _____ law, an object with no net force acting on it remains at rest
or in motion with a constant velocity.
A. Third
B. Fourth
C. Second
D. First
(for this question I related it to the concept of Newtons first law)

Is this correct
 
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The problem statement is a statement of Newton's First Law. If you looked it up and found that to be the case, then why did you even feel the need to ask here?
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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