Colliding Galaxies

Which two galaxies collided?

• Enceladus and Andromeda

• Milky Way and Triangulum

• Triangulum and Andromeda

• Andromeda and Milky Way

True or False: A car going in a straight line at a constant speed is accelerating.

• True

• False

True or False: A car slamming on their breaks to a stop to avoid a collision is accelerating?

• True

• False

True or False: A car turning a corner at a constant speed is accelerating?

• True

• False

An object accelerates when it....

• changes speed

• changes color

• changes direction

• changes direction or speed

The change in velocity is found by:

• Initial velocity - final velocity

• $velocity\ \div\ time$
  

• Final velocity - initial velocity

• acceleration - velocity

If I'm running at 10m/s and then I trip and fall and come to a stop after 5 seconds. What is my acceleration?

• -5m/s²

• 2m/s²

• -2m/s²

• 5m/s²