Answer:
obtuse maybe i really dont understand what you are saying.
Explanation:
Relative to the earth, the trains' speed is 15 m/s.
Relative to the train, the ball's speed is -15 m/s.
Therefore, relative to earth, the ball's speed is
15 - 15 = 0
Answer: 0
Answer:
<h2>20 kg</h2>
Explanation:
The mass of the rock can be found by using the formula

f is the force
a is the acceleration
From the question we have

We have the final answer as
<h3>20 kg</h3>
Hope this helps you
<span>The answer is, 7.44 kg*m/s</span>
Stressing an equilibrium simply means that the physical properties in which already exists are balanced. Stress can be applied by either changing the pressure or the volume or temperature.