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Ivahew [28]
3 years ago
8

Pls explain the following equation...

Physics
1 answer:
ddd [48]3 years ago
5 0
F = d/dx (mv)

F = m dv/dt + v dm/dt

In this case, dv/dt = 0

Which means that
F = v dm/dt

hope this helps
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You are making a round trip from City A to City B and back to City A again at constant speed. At what point in the trip is your
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Answer:

Halfway between B and A on the return leg.

Explanation:

Your average SPEED for the entire trip will equal your constant speed as the time and distance increase at proportionate rates.

Your average VELOCITY will equal your constant speed while you travel from A to B because time and displacement are increasing at proportionate rates.

When you turn around at B to return, your Displacement is now decreasing while your travel time continues to increase, so your average velocity decreases.

Lets say the distance from A to B is 90 km and your constant speed is 30 km/hr.

your average speed is 30 km/hr because you took 6 hrs to travel 180 km

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your displacement is given by d = 90 - 30(t)

and your total time of travel is t + 3 hrs

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10(t + 3) = (90 - 30t)

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(sliding friction force) = (pushing force), in the opposite direction.

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