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mariarad [96]
3 years ago
6

A box is pushed toward the right across a classroom floor.The force of friction on the box is directed toward the

Physics
1 answer:
noname [10]3 years ago
4 0
Left. Opposite of the direction the box is pushed.
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What happens if you reverse the orientation of the permanent magnet? why?
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If one reverse the orientation of a permanent magnet ITS MAGNETIZATION WILL BE PERMANENTLY REVERSED. This is because, the magnetic domains inside the permanent magnet aligned with the new applied field and increase with it while those domains that are anti aligned with that field will shrink.
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A block is sitting on a platform 20 m high. It weighs 50 kg. How much potential energy does it contain?
kifflom [539]

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9806.65 Joules

Explanation:

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2 years ago
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A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how h
Aloiza [94]
v_x=16,9\frac{m}{s}\\
s=44m\\
g=10\frac{m}{s^2}\\\\
v_x=\frac{s}{t}\Rightarrow t=\frac{s}{v_x}\\\\
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6 0
3 years ago
In a single movable pulley, a load of 500 N is lifted by applying 300 N effort. Calculate MA, VR and efficiency.​
galben [10]

Answer:

in pulley there are different kinds.but the most common one are fixed,moveable and compound pulley. in this question we asked about movable pulley.

Explanation:

Given request solutions

L=500N a,M.A=? a,M.A=L/E =5/3

E=300N b,V.R=? b,V.R=2

c,efficiency =? c,£=M.A/V.R=5/6

£=IS NOT THE REAL SYMBOLS OF EFFICIENCY BUT I IS LOOK LIKE THIS

I THINK I HELPED

6 0
2 years ago
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