Physics: if a body of mass m is placed on earth ,what is the amount of potential energy possessed by it (g:-9.8m/s

if a body of mass m is placed on earth ,what is the

Ответ:

gavinarcheroz2jxq

24.03.2021

Physics

mgh

Explanation:

Assume the height of the body is 1.8m.

The gravity?of the body is G=mg

the height of the gravity center is about 0.9m

E=mgh

=m*9.8m/s*0.9m

= 8.82mJ

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Ответ:

naomihiggins8783

25.09.2020

Physics

I_max= 1000 A

Explanation:

Expression of torque is given by

τ= BIA Sinθ

B= strength of magnetic field

I= current

A= Area

for maximum torque θ=90°⇒sin 90=1

Now for I_max= τ/BA

Let us take the average magnetic field of the earth as 50μT.

Area is calculated as

$A=\pi d^2/4=\pi\times0.16^2/4$

A=0.02 m^2

Substitute the values and calculate for maximum current

$I_{max}= \frac{\tau}{BA}$

$I_{max}= \frac{1\times10^{-3}{50\times10^{-6}\times0.02}$

I_max= 1000 A

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if a body of mass m is placed on earth ,what is the amount of potential energy possessed by it (g:-9.8m/s

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