A hoop, a solid disk, and a solid sphere, all with the same mass and the same radius, are set rolling without slipping up an inc
line, all with the same initial kinetic energy.
1. Which goes furthest up the incline?
2. The same three objects as in the previous question are set rolling without slipping up an incline, all with the same initial linear speed. Which goes farthest up the incline?
1. Which goes furthest up the incline?
2. The same three objects as in the previous question are set rolling without slipping up an incline, all with the same initial linear speed. Which goes farthest up the incline?
1 answer:
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Answer:
7500 m
Explanation:
The radar emits an electromagnetic wave that travels towards the object and then it is reflected back to the radar.
We can call L the distance between the radar and the object; this means that the electromagnetic wave travels twice this distance, so
d = 2L
In a time of
Electromagnetic waves travel in a vacuum at the speed of light, which is equal to
Since the electromagnetic wave travels with constant speed, we can use the equation for uniform motion ,so:
(1)
where
, where L is the distance between the radar and the object
Re-arranging eq(1) and substituting, we find L: