# A toy dart gun generates a dart with 0.180 kg.m/s momentum and a velocity of 4.1 m/s. What is the mass of the dart in grams rounded to 2 significant figures?

##### 1 Answer

Jan 27, 2017

#### Answer:

The mass of the toy dart is

#### Explanation:

**Momentum is mass in motion.** Momentum depends on the mass of the object in motion and its velocity. Because velocity is a vector quantity, momentum is a vector quantity, even though a direction was not included in this question.

The equation for momentum is

**Known**

**Unknown**

**Solution**

Rearrange the equation for momentum to isolate mass. Substitute the known values into the equation.