For the work-energy theorem, the work done by the worker must be equal to the variation of mechanical energy of the bucket.
The variation of mechanical energy of the bucket is sum of the variation of potential energy (U) and kinetic energy (K):
Taking the ground as reference, the variation of potential energy of the bucket is:
while the variation of kinetic energy is simply equal to the final kinetic energy of the bucket, since initially it was at rest (so its initial kinetic energy was zero):
So the minimum amount of work that must be done is equal to the variation of mechanical energy of the bucket:
Answer:
answer is d from my guess
Air, because it is the least dense material listed, meaning that light can travel through it quicker because there are less particles for it to collide with which would cause it to slow down as it loses energy with each collision
For an atom to achieve a stable electron configuration, it needs 8 valence electrons. Since this atom has 6 valence electrons, it needs 2 more to achieve a stable electron configuration.
8-6=2
Answer:
B. The width of a door
Explanation:
The width of a door is closest to 1 meter in length