A train travels at a rate of 13 meters per second (m/s). Over the next 60 seconds, the speed of the train increases to 22 m/s. What is the average rate of acceleration of the train?

Two bicyclists were riding their bikes at a rate of 20 kilometers per hour (km/h). During the next half hour, they observed that they had increased their speed to 26 km/h. What was their average acceleration?

An airplane travels at a constant speed of 800 kilometers per hour (km/h). Approximately how long will it take the airplane to travel 200 kilometers?

A passenger jet flies at an average speed of 600 miles per hour (mph) east. A satellite orbits Earth at about 17,500 mph, west to east. If the pilot of the jet sees the satellite passing directly overhead, how fast will the satellite appear to be moving?

A car is moving at a constant speed of 16 kilometers per hour (km/hr) while traveling in a circle. Why is the velocity of the car changing?

Some police speed radars function by directing a microwave beam at moving vehicles. The speed of a vehicle is determined by comparing the frequencies of the outgoing and reflected beams. Which of these will most likely have the greatest effect on the radar?