What is the acceleration of a 20 kg backpack lifted with a force of 15 N?

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

From the question

mass of backpack = 20 kg

force = 15 N

So we have

We have the final answer as

Hope this helps you

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-