Question

Assume your weight is 146 lb.

(a) Compute your weight in N.


(b) Compute your mass in kg.


Compute your mass in slugs.


(c) How much weight (in N) would you lose in going from the North Pole, where g = 9.83 m/s² to the equator, whereg = 9.78 m/s², assuming no loss in mass?

Answer 1

a)

1 N = 1 kg m s^-2

now, 1 kg = 2.2 lb

so, 146 lb = 66.22 kg

Therefore

weight of the object is a partcile of mass 1kg travelling with an acceleration due to gravity =9.8ms^-2

W = 1 * 9.8 N = 9.8 N

so, 1 kg = 9.8 N

66.22kg = 9.8 * 66.22 = 649 N

b)

1 kg = 2.2 lb

so, 146 lb = 66.22 kg

1lb = 0.031 slug

therefore 146 lb = 4.537 slug

c)

weight at the pole = 66.22 * 9.83 N = 650.94 N

weight at the equator = 66.22 * 9.78 N = 647.63 N