The simple machine that is not correctly matched with its appropriate task is the inclined plane because there is no such big ramp that is as high as 1 storey building, the appropriate task would be Lifting a heavy box and moving it across a room. and for the pulley : <span>Moving a heavy box up to the second floor of a building.</span>
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:
Lever
Explanation:
Fulcrum point is the point where the lever turns.
It is the center of a key activity
