1. Initially stationary (the train starts at rest), a train has a constant acceleration of 0.6m/s².

What is its speed after42s?

What would be the total time it would take to reach a speed of49m/s?

2. A rock is dropped off the side of a bridge and hits the water below6.9s later.

What was the rock's velocity when it hit the water? speed and direction

What was the rock's average velocity as it fell? speed and direction

What is the height of the bridge above the water?