A car is constrained to move back and fourth along a straight track (along the x

Question

A car is constrained to move back and fourth along a straight track (along the x-axis). This car starts at the position r=-125 m a time t=0. Then the car travels 260. m in the +x-direction for 15.0s at a constant speed. Then the car immediately reverses and travels 235m in the -x-direction for 25.0s at a constant speed (but different speed). Be sure to include all units and proper sig figs in answer.

1. what is the cars final position at t=40.0s. show work.

2. what is the cars average velocity during the entire 40.0s? show work

3. what is the cars average speed during the entire 40.0s. show work

Explanation / Answer

1. The final position of car is x=-100 m

2.Avg. Velocity is 25 m/40 s =0.625m/s

3Avg. speed is 13.366 m/s

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