Answer:
The forces acting on the box became unbalanced when the third student started pushing.
Explanation:
The horizontal forces, friction and applied, were balanced until more force was applied than friction. Mass can't increase or decrease.
Answer:
It's true cause it got no nucleus
Explanation:
$6,188/82=75.4634146 so if you round that to the nearest hundredth you get $75.46(C)
The answer is all of the above :)