Which of the following is a complete description of the velocity of an object in motion?A train travels due west at 90 km/h. A 7 kg bowling ball rolls a distance of 20 m in 3 s. A runner jogs 6 km/h for 10 minutes. Birds fly 600 km south for the winter. When an object accelerates, what about its motion changes?Speed must change, but not velocity. Both speed and velocity must change. Velocity must change, but not speed. Neither speed or velocity can change. An image of a cue ball striking the surface of a pool table is shown. All of the following describe the acceleration of the cue ball EXCEPT -the ball changed direction when it hit the side of the table. the ball traveled at 30 cm/s while it was moving. the ball was at rest until it was struck by the pool cue. the ball eventually came to a stop due to friction. Which of following gives the best description of speed?A school bus travels 40 km in an hour. An airplane flies south for a time of 2 h. A freight train travels 500 km in a day. A hot air balloon travels at 35 km/h from Albuquerque to Santa Fe. Which of the following describes the speed, but not the velocity of an object?60 miles per hour60 miles per hour south30 miles north30 miles per hour southIn order to describe the velocity of an object, which three pieces of data are needed?The mass of the object in grams The speed at which the object traveled The pull of gravity on the objectThe distance traveled by the object The time taken to travel The direction of travelThe mass of the object in grams The time taken to travel The acceleration of the objectThe distance traveled by the object The force the object had on another object The mass of the object in grams