A resultant force of 45 kg Is acting on a body whose acceleration Is 10 `"m/ sec"^2` . Calculate the mass of the body.

Options

A. 450 kg
B. 44.1 kg
C. 4.5 kg
D. 1960 kg.

Answer

B

Explanation

F=ma where F =45 kg force, m=?and a=10 `m//sec^2`
1 kg force=`1 kg xx 9.8m//sec^2`
45 kg force= 45 kg x 9.8 `m//sec^2`
F=441 newtons
`m=F//a=(441 kg m//sec^2)/(10 m//sec^2)`=44.1 kg