A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Suppose that a NASCAR race car is moving to the right with a constant velocity of +82 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same speed. What is the average acceleration of the car?
I understand (a) but I don't understand how to solve for (b) can someone please help me?
anonymous
 5 years ago
Suppose that a NASCAR race car is moving to the right with a constant velocity of +82 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same speed. What is the average acceleration of the car? I understand (a) but I don't understand how to solve for (b) can someone please help me?

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0average acceleration = average velocity/time = 82 / 12 = 41 / 6 = 6. 83

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Acceleration = dv/dt thus it is the change in velocity over the change in time or the derivative of the velocity time graph. Thus if you have a constant velocity (including both speed AND direction) then you have 0 acceleration.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0in part b you have to realize that velocity includes direction. Velocity is a vector. Because of this, when the car is going in the opposite direction, its velocity is now 82 m/s

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so, in those 12 seconds the car went from moving at +82 m/s to 82 m/s. The difference which is equivalent to the change is velocity is obviously 82*2=164 m/s

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so to find average acceleration we look change in velocity over change in time = 164m/s/12s = 13.67 m/s^2
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.