Calculating Meeting Point and Time for Accelerating Vehicles

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The discussion revolves around using Interactive Physics software to solve a problem involving a speeding station wagon and an accelerating police car. Participants express difficulty in understanding the scripting required for the simulation. The goal is to determine when the two vehicles have equal speeds, their meeting position, and the time of their encounter. One user plans to explore Interactive Physics further by requesting a demo version to assist with the problem. The thread highlights the need for guidance in setting up the simulation effectively.
Shehezaada
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Hey guys!

Anyone used Interactive physics? We're havin trouble understanding the scripts and stuff...here's a question we are supposed to do...can someone help us out here, by starting us off in the right direction?

A speeding station wagon passes a parked police car. The police car begins to accelerate at the moment that the station wagon passes. One can vary the station wagon's speed abd the police car's acceleration. The moment when the speeds are euqal, the position when they meet and the time when they meet must be displayed.

Any tips would be wonderful guys, thanks!
Shehezaada
 
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Hi,

I had never heard of Interactive Physics before reading your post, but I have just Googled it and sent a request for a demo version. I should have it sometime today. If no one else gets to this thread, then we'll talk more later.
 
thanks a lot tom!
 
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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