A body of mass m has weight
F = GMm/r²
on the surface of the Earth, where G is the universal gravitational constant, M is the mass of the Earth, and r is it's radius.
If the weight is to be halved, then we have
1/2 F = 1/2 GMm/r² = (1/√2)² GMm/r² = GMm/(√2 r²)
so the distance between the body and the planet's center needs to be
√2 × 6.4 × 10⁶ m ≈ 9.1 × 10⁶ m
Answer:
0.02
Explanation:
Force,
where N is normal reaction and coefficient of kinetic friction is
. Also, N is equivalent to mg ie N=mg where m is mass of an object and g is acceleration due to gravity. Making
the subject of the formula then
![\mu_k=\frac {F}{mg}](https://tex.z-dn.net/?f=%5Cmu_k%3D%5Cfrac%20%7BF%7D%7Bmg%7D)
Substituting F with 2 N, m with 10 kg and g with 9.81 then
![\mu_k=\frac {2}{10\times 9.81}=0.0203873598369\approx 0.02](https://tex.z-dn.net/?f=%5Cmu_k%3D%5Cfrac%20%7B2%7D%7B10%5Ctimes%209.81%7D%3D0.0203873598369%5Capprox%200.02)
The answer is N because i have done this be for because im in k12 and i got 100% right
The best and most correct answer among the choices provided by your question is the second choice or letter b.
Ex is negative from x = -2 to x = 0, and positive from x = 0 to x = 2 <span>correctly describes the orientation of the x-component of the electric field along the x-axis.</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
☄ <u>Universal</u><u> </u><u>Gravitational</u><u> </u><u>Constant</u><u>(</u><u>G</u><u>)</u>
Gravitational constant is a constant of proportionality when F(Gravitational force) is proportional to product of masses and inversely proportional to the distance between them.
- It can be defined as:- Universal gravitational constant is the magnitude of the force between a pair of 1 kg masses that are kept 1 metre apart.
- The SI unit of G is N m²/kg² and the CGS unit of G is Dyne cm² / g².
<h3>☄
<u>Do</u><u> </u><u>you</u><u> </u><u>know</u><u>?</u></h3>
The value of G (universal gravitational constant) was found out by the scientist Henry Cavendish by using the sensitive torsion balance![.](https://tex.z-dn.net/?f=.)
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