3. A car travels along a straight line at a constant speed of 72.0 km/h for a distance x and then another distance 2x in the same direction at another constant speed of 36.0 km/h.
3. A car travels along a straight line at a constant speed of 72.0 km/h for a distance x and then another distance 2x in the same direction at another constant speed of 36.0 km/h.
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Transcribed Image Text:3. A car travels along a straight line at a constant speed of 72.0 km/h for a distance x and then another
distance 2x in the same direction at another constant speed of 36.0 km/h.
(a) What is the average speed and average velocity for this trip?
4. At t =
0, one car is rolling on a straight-line initial position 10.0 m, initial velocity 5 m/s, and constant
acceleration 3.0 m/s². At the same moment, another car is set rolling on an adjacent track with initial position
50 m, initial velocity 72 km/hour, and zero acceleration.
(a) At what time, if any, do the two cars have equal speeds?
(d) What are their locations at that time?
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