# kinematics

## Deep Impact on Earth

In this activity students will work out how long it takes light to travel from comet Tempel 1 to Earth and how long after the collision in the Deep Impact mission we will see this event.

**Objectives**

Students will:

## Impactor Speed

The aim of this activity is to use vectors and Pythagorasâ€™ theorem to work out the speed at which an impactor hits a comet.