A car travels a certain distance along a straight road (in the +x direction). Th

Question

A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the figure below. When the car changes speed it does so uniformly. Select the appropriate choice for each statement.

!! Answers provided... Please explain why these answers are correct! Thx

A car travels along a straight road (in the +x direction). When the car changes speed, it does so uniformly. The position of the car as a function of time is 50 40 shown in the figure below. o 20 O 10 |234567891011 12 Time (s) A. Select the appropriate choice for each statement. equal to: The magnitude of the acceleration at P is.. that at U less than: The speed at N is.. that at U Incorrect. Computer's answer now shown above Submissions to practice problems are not permanently recorded . Tries 2/2 Previous Tries

Explanation / Answer

Solution:

i) The slope of position time graph gives us the speed Now if we calculate the slope from the above graph we can see that graph at U is same as Graph at P straight line and approximately same angle so they both should have same unifrom speed that implies at both point the car should have same acceleration.

ii) Again the same concept slope of position time graph gives us the speed , Now slope depends on angle with the x-axis counterclockwiese so if you see the graph at U is having more angle comapre to N ( you can see steepness of the graph) so Speed At U must me more than Speed At N .  

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.