1. A car moves east at 18 m/s for 5 min. What is its displacement?
2. A car goes 25 m, east, in 5 min. What is its speed? Its velocity?
3. A car has a speed of 40 km/h. What is its speed in m/s?
4. A car has a speed of 15 m/s. What is its speed in km/h?
5. A car travels at the rate of 20 m/s, E, for 50 seconds and then travels at the rate of 30 m/s, W, for 40 seconds. What is its average speed for the entire trip? What was its average velocity?
6. A boat has a velocity of 8 m/s, east. It is crossing a river that is 20 m wide. The current in the river flows south at 5 m/s. How long will it take the boat to cross the river? How far downstream does it land from its starting point?
7. Answer the following questions about the object’s motion. You may enter the data into a graphing calculator, setting your StatPlot at connected dots or you may draw a graph, connecting the points.

   time in sec, distance in m)

   (0,0)

   (1,5)

   (2,10)

   (3,10)

   (4,8)

   • What is the object’s speed between 0 and 2 sec?
   • When is the object motionless?
   • What is the object’s speed between 3 and 4 sec?
   • When does the object travel its fastest?
   • When is the object moving toward its reference point?

Velocity Notes

Velocity Homework