What is the formula for acceleration?
Acceleration = Change in velocity / change in time
What can we find with a distance vs time graph?
speed of an object
What are three ways we can tell if something is accelerating?
speeding up, slowing down, changing direction
Final Velocity = 50 m/s south. Initial Velocity = 60 m/s south. Time to change velocity = 5 seconds. What is the acceleration of this object?
-2 m/s squared, south
A distance vs time graph shows a line with a constant slope. What can you determine about the object's motion?
It's moving at a constant speed
A porcupine moved toward a pond at a speed of 5 m/s. It took him 8 seconds. What was the distance he traveled?
40 meters
An object travels 25 meters in 2 seconds east. What is it's velocity?
12.5 m/s east
What does a horizontal line in a distance vs time graph indicate?
The object is at rest (no movement)
An alien moved south in it's spacecraft 2 km at a rate of 20 m/s. How much time did it take him to do this in seconds?
100s
A car brakes hard, decelerating at 50 m/s/s. How long does it take to slow down from 75 m/s to a stop?
1.5 seconds
What formula would we use if we wanted to find out how an object's velocity changed within a certain period of time?
Acceleration