A rail car moving at 10m/s collides with and connect to another stationary car. What is their final velocity?
1 answer:
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Answer:
They're going to increase the total resistance as
Explanation:
If the resistors are in parallel, the potential difference is the same for each resistor. But the total current is the sum of the currents that pass through each of the resistors. Then
where
but
for
so
where
The acceleration of the car,
Here, v is final velocity, u is initial velocity and t is time taken by the car.
Given ,
and
Therefore, from above equation
.
Here, negative sign shows deceleration of a car.
Thus the the magnitude of car acceleration is .