Question

calclate the weight of an object of mass 100 kg on the surface of a planet whose mass and diameter are 4.8 *10 power 24 kg and 12000 km respectively?

Answer 1

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All the substances on Earth will enjoy an acceleration of 9.8 m/s^2 on them because of Gravity.

Since, weight is a kind of force, the formula to compute Weight is similar as that of computing any force.

Therefore, weight = 10 kg * 9.8 m/s^2. weight = 98kg.m/s^2= = 98 newton.

So, the weight of the substance should be alike that of the figure on earth’s surface

Answer 2

see explanation

mass of planet (M) = 4.8×10^24 kg

mass of object (m) = 100 kg

diameter of planet (d) = 12000km = 12000000m

radius of the planet (R) = d÷2 = 12000000÷2

= 6000000

= 6×10^6m

we have,

g = GM/R^2

= 6.67×10^-11×4.8×10^24 / (6×10^6)^2

= 8.896

again,

W = mg

= 100 × 8.896

= 889.6 N

: The weight of an object is 889.6 N.