I believe the answer is D. Have a good day.
Answer:
The poem, Going Down the Hill on a Bicycle, written by Henry Charles Beeching describes the thrilling ride of a boy going downhill. ... The poet mentions how he lifts his feet from the pedals and keeps his hands still so that he would not lose his balance and fall off the bicycle, while it is dashing down the hill.
Let us follow the motion of the hammer first. Because the elevator is in motion, when he drops the hammer, because of inertia, there is a slight moment when the hammer also rises with the elevator. Eventually it will reach its highest peak and drop down to the floor. So, the total time for the hammer to reach the floor would include: (1) the time for it to rise with the elevator to its highest peak and (2) the time for the free fall from the highest peak to the floor.
1.) Time for it to rise with the elevator to its highest peak:
Hmax = v²/2g = (6 m/s)²/2(9.81 m/s²) = 1.835 m
Time to reach 1.835 m = 1.835 m * 1 s/6 m = 0.306 s
Time for the free fall from the highest peak to the floor:
t = √2y/g, where y is the total height
y = 1.835 m + 42 m = 43.835 m
So,
t = √2(43.835 m )/(9.81 m/s²) = 2.989 s
Therefore, the total time is 0.306 s + 2.989 s = 3.3 seconds
2.) Velocity of impact of a free-falling body is:
v = √2gy
v = √2(9.81 m/s²)(43.835 m)
v = 29.33 m/s
If an object is moving and has velocity it has kinetic energy. the kinetic energy of an object is the energy that it possesses due to its motion.
In my work I used the formula for kinetic energy to answer your question. Hope this helps.
Because it’s warmer and more humid
