# Newton's Second Law

# Simple Numerical Problems

##

Example 1:

A net force of 10 Newtons acts on a box which has a mass of 2 kg.
What will be the acceleration of the box?

### Solution:

This
is about as straightforward as it can get - Newton's Second Law
says that the acceleration of an object equals the net force on it
divided by its mass:

Note that if the net force is in Newtons and the mass is in
kilograms, the acceleration is in m/s^{2}. Why? Here's a way
to think about it. The force "1 Newton" is defined to be the amount
of force that will accelerate an object of mass 1 kg at 1
m/s^{2}.

##

Example 2:

How much horizontal net force is required to accelerate a 1000 kg
car at 2 m/s^{2}?

### Solution:

Newton's 2nd Law relates an object's mass, the net force on it,
and its acceleration:

last update April 6, 2000 by JL
Stanbrough