What Are the Correct Units for Momentum?

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The momentum of a 91 kg half back moving at 4 m/s is calculated using the formula momentum = mass x velocity, resulting in 364. The correct units for momentum are kg•m/s, although the answer was accepted as 364 Units. There is some confusion regarding the terminology of "Units" in this context. Despite the informal labeling, the calculation is accurate. The discussion highlights the importance of using proper units in physics problems.
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Homework Statement


Calculate the momentum of a 91kg half back moving with a velocity of 4m/s.


Homework Equations


Momentum = mass x velocity


The Attempt at a Solution


91 kg x 4 m/s = 364 Units

Am I correct??
 
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Hannah1 said:

Homework Statement


Calculate the momentum of a 91kg half back moving with a velocity of 4m/s.


Homework Equations


Momentum = mass x velocity


The Attempt at a Solution


91 kg x 4 m/s = 364 Units

Am I correct??

What are the units of "Units"?
 
berkeman said:
What are the units of "Units"?

I believe the units for momentum is kg•m/s, but I submitted the answer as 364 Units and it was correct.
 
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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