slader A baseball player slides to a stop on level ground. Using energy consideration, calculate the distance the 65 kg baseball
1 answer:
Answer:
2.6 m
Explanation:
From work energy theorem we deduce that
The kinetic energy equals to the work dine against friction energy.
Where m represent mass, v is the velocity, f is the frictional force and d is unknown distance that the player slides.
Making d the subject of the formula then
Then by substituting 450N for f, 65 kg for m and 6 m/s for v we obtain
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a) , 1.6 A
b) , 1.33 A
Explanation:
a)
In this situation, we have two resistors connected in series.
The equivalent resistance of resistors in series is equal to the sum of the individual resistances, so in this circuit:
where
Therefore, the equivalent resistance is
Now we can use Ohm's Law to find the current flowing through the circuit:
where
V = 8 V is the voltage supplied by the battery
is the equivalent resistance of the circuit
Substituting,
The two resistors are connected in series, therefore the current flowing through each resistor is the same, 1.6 A.
b)
In this part, a third resistor is added in series to the circuit; so the new equivalent resistance of the circuit is
where:
Substituting, we find the equivalent resistance:
Now we can find the current through the circuit by using again Ohm's Law:
where
V = 8 V is the voltage supplied by the battery
is the equivalent resistance
Substituting,
And the three resistors are connected in series, therefore the current flowing through each resistor is the same, 1.33 A.