Physics
posted by Denise .
I'm trying to help my 7th grader with homework and I don't know this stuff.
How do you figure word problems based on newton's 2nd law.
one problem is: What is the acceleration of a ball if a force of 20N is applied to the 8kg ball?

Newtons second law is Force=mass(acceleration)
F= 20 N
m= 8 kg
Newton (N)= kg.m/s^2
20N=8kg(a)
a=2.5 m/s^2