Solar roller is a cool name
Answer:
Mechanical vs. Quartz Watch Movements
Mechanical watch movements are powered by gears and springs. They're autonomous little machines without the need for electric power sources, whereas quartz watches are powered by batteries that vibrate little crystals.
Potential Energy = mass x gravity x height
PE = mgh
PE = 250kg x 9.8 m/s^2 x 50m
PE = 118,750 joules = 118kJ
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Answer:53.63![ms^{-2}](https://tex.z-dn.net/?f=ms%5E%7B-2%7D)
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Explanation:
The equations of motion used in this question is ![v=u+at](https://tex.z-dn.net/?f=v%3Du%2Bat)
When a object is projected horizontally from a sufficiently height,the x-component of acceleration remains zero because there is no force that drags the object in x direction.
But,due to gravity,the object accelerates downward at a rate of
.
In X-Direction,
Given that initial velocity=
=![33.8ms^{-1}](https://tex.z-dn.net/?f=33.8ms%5E%7B-1%7D)
Using
,
![v_{x}=33.8+(0)4.25=33.8ms^{-1}](https://tex.z-dn.net/?f=v_%7Bx%7D%3D33.8%2B%280%294.25%3D33.8ms%5E%7B-1%7D)
In Y-Direction,
Given that initial velocity=
=![0ms^{-1}](https://tex.z-dn.net/?f=0ms%5E%7B-1%7D)
Using
,
![v_{y}=0+(9.8)4.25=41.65ms^{-1}](https://tex.z-dn.net/?f=v_%7By%7D%3D0%2B%289.8%294.25%3D41.65ms%5E%7B-1%7D)
![v=\sqrt{v_{x}^{2}+v_{y}^{2}}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7Bv_%7Bx%7D%5E%7B2%7D%2Bv_%7By%7D%5E%7B2%7D%7D)
![v=\sqrt{1142.44+1734.72}=\sqrt{2877.163}=53.63ms^{-1}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B1142.44%2B1734.72%7D%3D%5Csqrt%7B2877.163%7D%3D53.63ms%5E%7B-1%7D)