Average acceleration of a car changing speed and direction

Thread starter danielsmith123123
Start date Jul 6, 2021
Tags

Acceleration Average Average acceleration Car Direction Speed

Jul 6, 2021

danielsmith123123

Homework Statement: A car, travelling initially at 28 m/s [W25 ̊N], takes 8 s to change its velocity to 25 m/s [S]. What is the average acceleration over this time interval?

Relevant Equations: a = vf-vi / t

Nevermind I found what I had to do, thank you though.

Physics news on Phys.org

Jul 6, 2021

Delta2

Homework Helper

Insights Author

You basically have to do one vector subtraction (subtract the 2 given vectors of velocity and keep the result as vector) and then 1 division by 8sec.

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...

View full post »

Thread 'Explain this asphalt sheen'

This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is The second part of the problem is exactly why you get this affect. And one more spoiler:

View full post »