Answer:
initial kinetic energy = final kinetic energy = m · v²
Explanation:
Hi there!
Since the gliders collide elastically, the kinetic energy and momentum of the system after the collision are the same as before the collision.
Then, the initial kinetic energy of the system will be equal to the final kinetic energy of the system.
The equation of kinetic energy for each glider is the following:
KE = 1/2 · m · v²
Where:
KE = kinetic energy.
m = mass of the glider.
v =velocity of the glider.
The sum of the kinetic energies of each glider is the kinetic energy of the system. Then, the initial kinetic energy of the system will be:
initial KE = 1/2 · m · v² + 1/2 · m · v²
initial KE = m · v²
Since the initial kinetic energy of the system is equal to the final kinetic energy of the system:
final KE = m · v²
Using the equation of momentum of the system:
initial momentum = m · v + m · (-v) = m (v-v) = 0
The initial and final momentum of the system is zero because both vectors cancel each other for being of the same magnitude but of opposite direction.
Answer:
A) a scientific theory or principle
Explanation:
A Theory or principle has to explain different observations for a specific phenomenon. Theories are tested in base of new data to see if they can fit with all the new variations. They gain more acceptance in the scientific world if they predict in a correct way the result of many observations.
For example the uncertainty principle which state that the position and the momentum of a particle can not be known at the same time. Many experiments that aim to test the Uncertainty principle demonstrated this property, but tests are currently being done with other variations to see if the principle still fits with them.
Answer:
continue moving with constant velocity
Explanation:
