Answer:
43,555 W
Explanation:
Since the speed is constant, this means that the force applied to lift the equipment is equal to the weight of the equipment. So we can write:
where
m = 1000 kg is the mass
is the acceleration due to gravity
So,
Then the work done in lifting the equipment is:
where
d = 200 m is the displacement of the equpment
Substituting,
Finally, the power used to lift the equipment is the ratio between the work done and time taken:
where
t = 45 s is the time taken
Solving,
Work, scientifically speaking, is done when a force is applied to an object which consequently moves the object at a certain direction. Work in formula, is force multiplied with distance.
W = F x d
We have: v = d/t
From the expression, we conclude speed is indirectly proportional to speed.
So, the car which will take longer time must have the smallest speed. Among all the options Car C has the smallest speed. So, it would be your answer.
In short, Your Answer would be Option C) Car C will take longer time than any other.
Hope this helps!
The best conclusion that can be drawn is that D) A current does not flow in the wire
Answer:
The wavelength stays the same.
Explanation:
When the amplitude is increased, the wavelength stays the same.
Here the wavelength doesn't depend upon the amplitude.
