Thomas was given the following scenario: "A 5N box is pushed across the floor with a force of 7 N. The friction acting on the bo
x is 5 N. Draw a free body diagram and determine the net force acting on the box." Thomas submitted the answer that the net force acting on the box was 7N and he constructed the free-body diagram below. Did Thomas answer the question correctly? Cite your evidence for your answer and explain your reasoning. If he was incorrect state what the correct answer would be and WHY?
1 answer:
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Answer:
The current halves
Explanation:
The relationship between voltage, current and resistance in a circuit is given by Ohm's law:
where
V is the voltage
R is the resistance
I is the current
We can rewrite the formula as
we see that I is directly proportional to V and inversely proportional to R. In this problem, V is held constant while R is doubled:
so, the new current in the circuit will be
So, the current halves.