Answer:
point-contact transistors
The final velocity of the 15 kg mass is 18.33 m/s.
<h3>
Conservation of linear momentum</h3>
The final velocity of the 15 kg mass can be determined by applying the principles of conservation of linear momentum as follows;

Where;
- m₁ is the mass of the first object = 25 kg
- u₁ is the initial velocity of the first object = 15 m/s
- m₂ is the mass of the second object = 15 kg
- u₂ is the initial velocity of the second object = -10 m/s
- v₁ is the final velocity of the first object = -2 m/s
- v₂ is the final velocity of the second object
Thus, the final velocity of the 15 kg mass after the collision is 18.33 m/s.
Learn more about conservation of linear momentum here: brainly.com/question/7538238
Answer:
Mechanical energy = 3.92 J
exactly 3.92 j
Explanation:
As we know that mechanical energy is sum of kinetic energy and potential energy of the system
so here we can say that mechanical energy is sum of kinetic energy of ball and its potential energy
Since ball is at rest so kinetic energy of the ball must be ZERO
Now for potential energy we know that

now we know
m = 0.2 kg
h = 2 m
now for potential ene'rgy


so mechanical energy is given as
Mechanical Energy = 3.92 + 0 = 3.92 J
Something known to be working or a knew discoveries and something that us mathematically correct