# What is the acceleration of a body that goes from #"40 m/s"# to rest over a distance of #"20/100 m"#?

##### 2 Answers

#### Explanation:

Th kinematic equation connecting quantities of interest is

where

Inserting given values in the equation in SI units, we get,

Solving for

The acceleration is

The acceleration is negative because the object slowed to a stop. This is a negative acceleration, sometimes called deceleration (but not in Physics).

#### Explanation:

**Use the equation:**

where:

**Known**

**Unknown**

acceleration,

**Solution**

Rearrange the equation to isolate

The acceleration is negative because the object slowed to a stop. This is a negative acceleration, sometimes called deceleration (but not in Physics).