If the piece of glass were suspended in air, It would weight (the buoyancy of air is neglected)

Options

A. 100 Newtons
B. 50 Newtons
C. 10 Newtons
D. 600 Newtons

Answer

A

Explanation

F=mg . 10 kg x `9.8m//sec^2`
`=98 kg-m//sec^2`=98 N
The acceleration of gravity is 32 `ft//sec^2` . This may be converted to acceleration in the Mks system by working out a conversion factor `"2.54 cm"/"in."xx12`=30.48 cm/ft.=0.30 m/ft.
32 x 0.30 = 9.6 `m//sec^2`
The smaller number results from rounding . but this is close enough .