In a circuit, the current at a location is 4 amps and the voltage is 9 V. What is the Power at this location of the circuit?
2 answers:
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Answer:
<em>The force exerted by the car engine was 3000 N</em>
Explanation:
<u>Mechanical Force</u>
According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:
Where a is the acceleration of the object.
On the other hand, the equations of the Kinematics describe the motion of the object by the equation:
Where:
vf is the final speed
vo is the initial speed
a is the acceleration
t is the time
The question describes how Meitner drove home taking her car from rest to a speed of 20 m/s in 10 seconds. This provides us the following data:
vf=20 m/s, v0=0 (rest), t = 10 seconds.
From the kinematics equation, we can solve for a:
The force exerted by the car engine was:
The force exerted by the car engine was 3000 N