Answer:
230k
Explanation:
energy capacity maximum is 573 total available. 343k of that energy is present at release and subsequent loss leaving max used energy of 230k.
Below are the examples of work being done on an object
Carrying a box up a flight of stairs.
Lifting a bag of groceries.
Lifting a rock off the ground.
Pushing a grocery cart through the store.
<h3>Workdone</h3>
Work is said to be done when a force applied moves a distance
Work done = force × distance
Learn more about work done:
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Let’s see if he catches before he reaches 8m/sVelocity = acceleration * time, V = at, So, 8 m/s = 3.6 m/s * t, so t = 2.22 sec in that time he moved Distance = Initial Velocity * time + 1/2 acceleration * time * time S = 0*2.22 + 1/2*3.6*2.22*2.22 = 8.9 meters in 2.22 seconds, the boxcar moved S = V*t = 4.5 * 2.22= 9.99 meters, so he still needs to catch up 9.99 m - 8.9 m = 1.09 meters. Since he’s moving at 8 m/s and the train also is moving at 4.5 m/s, his closing speed is (8 - 4.5) = 3.5 m/s
It will take him 1.09m/ 3.5m /s = .31 seconds more to catch up.
So, answer for How long does it take him to catch up to the empty box car is 2.22 sec + .31 sec = 2.53 seconds. answer for What is the distance traveled to reach the box car, we use the speed of the train since it was constant, Distance = Velocity * time = 4.5 m/s * 2.53 s = 11.4 meters.
Galileo Galilei is the man that invented the stuff
