A 3874-kg rollercoaster is brought to the top of a 42m hill in 40 seconds, then drops 28m before the next hill. a) How much work is required to get the coaster to the top of the first hill?
b) What power is required to bring the train to the top of the first hill?
c) How much PE is lost when the coaster drops?
d) How much PE is left at the bottom?

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.