Question

a force f= 3i+4j newton is applied on a body of mass 2 kg . calculate the magnitude and direction of the acceleration in the body .

Answer 1

First of all, you need to find out the magnitude of the force vector in order to divide it by acceleration.

The magnitude is given by |F|= sqrt of 6^2+ (-8)^2+ 10^2 which results, 14.1N (approx). Now, by F= ma; m= F/a

M= 14.1/ 1.

So, m= 14.1 kg.