Question

An object $A$ of mass of $0.1kg$ exerts a force of $1N$ on a body $B$. Then the acceleration of the body $A$ is how much in $m{s}^{-2}$:

• A. Zero
• B. $10$
• C. $-10$
• D. $-5$

Answer 1

Answer: (C)

$-10$

Newton's third law : For every action there is always an equal and opposite reaction
Since the body A applies 1 N on body B , then the body B also applies 1N on A but in opposite direction
$F=ma$

$F=-1N$ $m=0.1kg$
$-1N=0.1\times a$
$a=-10m{s}^{-2}$