Answer:
<h2>7.5 kg</h2>
Explanation:
The mass of the train can be found by using the formula

k is the kinetic energy
v is the velocity
From the question we have

We have the final answer as
<h3>7.5 kg</h3>
Hope this helps you
Answer:
Scenario 2
Explanation:
because literally theres no point in scenario one and i did the quiz and got it right
Answer:
zero
Explanation:
no distance has moved while holding the sheet...so no distance means no workdone..no workdone means no power...
it's just 1/8, no pi included (if you're on APEX)
V = u + at
75 = u + 7.1 a
s = ut + 1/2 at^2
You can find it using this two equation method. The original speed will be the u
hope this helps