Answer:
B) The 2-kg mass travels twice as far as the 4-kg mass before stopping
Explanation:
As we know that both mass have same horizontal force opposite to their motion
So we will have
now the stopping distance of an object moving with initial speed v is given as
so here we have
for other object we have
So correct answer will be
B) The 2-kg mass travels twice as far as the 4-kg mass before stopping
If you simply divide joules by seconds, the answer is in units
of joules/sec (watts) which is exactly what you want.
(67,500 joules) / (45 sec) = 1,500 joules/sec = 1,500 watts
Answer:
endothermic
Explanation:
Endothermic processes occur when a system increases in temperature which is usually caused by a heat transfer from its surroundings.
Answer:
Logically yes, because Newton's Third law state "When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body."
If force wasn't pushing up then neither gravity is pulling down.
Efficiency =
(useful work you get out of it) / (work you put into it)
= (100,000 J) / (250,000 J)
= 0.4 = 40% (choice-A)
