Velocity and acceleration equations

AI Thread Summary
The discussion focuses on understanding velocity and acceleration equations, particularly in the context of a homework assignment involving examples from animals, sports, and planets. Key equations include velocity as displacement divided by time and acceleration as the change in velocity over time. A participant expresses confusion about calculating acceleration using a rabbit as an example, seeking clarification on how to apply the equations. Suggestions are provided to find acceleration using initial and final velocities along with displacement or time. The conversation emphasizes the importance of kinematic equations for solving these problems effectively.
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Homework Statement


write a report about different velocity and acceleration give some examples on animals,sports,planet...


Homework Equations


velocity=displacement/time
acceleration=velocity/time
displacement =1/2(velocity1-velocity2)time
velocity2=velocity1+ accelerating(time)
(velocity2)2=(velocuty1)2+2acceliration(displacment)


The Attempt at a Solution


well I'm stuck at this thing for one whole week !how to find the acceleration,i mean if we took a rabbit as an example how can i ind it's velocity or acceleration if i have no clue i know i can look through the net and find it but i have to write down the solving,so please help me
 
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I don't think I got ur question correctly. Could u elaborate please? However, it seems that u want to find acceleration, So there are many ways to find the acceleration
1- if u have initial, final velocity and displacement.
2- if u have initial velocity, time displacement.
All this comes from the kinematic equation look up the net for kinematic equations.
I hope everything is clear :)
 
yeah that is right.thanx fo the help
 
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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