A body mass of 40 g is gravitational potential energy of 160 J on the ground. Given g = 10 m/s2, determine the value of the mass of the body

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But mass is given??
The amount of the mass is 40 grams
if mass is given then what we have to find
i suppose 40g mass is resting on surface of a planet. question is to find that.

Answers

2014-07-18T19:06:02+05:30

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Potential Energy= Mass×Acceleration due to gravity×Height 
P=m×g×h
P=160J, g=10m/s², m=40g= \frac{40}{1000} kg

Here height is unknown, 
So we can write,
h= \frac{P}{m×g}
h= \frac{160×1000}{100×40}
h=40m

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2014-07-22T19:49:31+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
G = G M / R^2     
      R = radius of planet earth    G = gravitational constant = 6.67*10^-11     
      M = mass of earth .  m = 40g    we have find M
P. E. = G M m / R  = 6.67*10^-11 M 0.040 /R  = 160 Joules
      =>  M = 26.68 * 10^14 R
P E / g = R  m   from formulas
   => 160 / 10 = R * 0.040  => R =  400 meters    => M = 400 * 26.68 * 10^14  kg
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