Question

A man weighs 750 N on the surface of the earth. What would be his weight when standing on the moon? The masses of the earth and the moon are respectively, 5.98×1024 kg and 7.36×1022 kg. Their radii are respectively 6.37×103 km and 1.74×103 km

Answer 1

Will use Newton’s Law of Gravity.
F=(kG)(mM)/(D^2)
k=.224 (is a constant that
makes the force come out in pounds)
G=6.67*10^-11 (Gravitational Constant)
M=7.36*10^22kg (the mass of the Moon)
m=76.478715kg (mass of the person)
D=1.74x10^6 meters (the radius of the moon)

F=(.224)(6.67*10^-11)(76.478715kg)(7.3*10^22)/(1.74*10^6)^2 = 27.55 lb
that means he will weigh 27.55lb or 28 lb on the surface of the Moon.



http://muller.lbl.gov/teaching/physics10/old%20physics%2010/chapters%20(old)/chapters_Jan_2004/Chapter03.pdf

Answer 2

pls the options are :200.5N,123.7N,550.4N AND 1000.0N..i need an explanation

Answer 3

expecting ur explanations,the options are in N not Ib..THANKS

Answer 4

So the answer is 123.7N ( sorry if this doesn't help :( )
You could also convert that 27.55lb into N by using the converting factor 1lb=4.45N so you'll multiply 27.55*4.45N = 123N

Answer 5

WAOO,tnx so much

Answer 6

A ball of mass 50 g tied to the end of a 50 cm inextensible string is whirled around in a vertical circle. Find the tension in the string when the ball is at the top of the circle. Take
g=10m/s2

Answer 7

pls help me with that question