Change in direction of velocity

AI Thread Summary
To calculate acceleration when changing direction from right to down at a constant speed of 5 m/s, the change in velocity (Δv) can be found using vector addition and the Pythagorean theorem, resulting in a magnitude of 5√2. The average acceleration is then calculated using the formula A = Δv/t, with a time interval of 2 seconds, yielding A = 5√2 / 2. The direction of the average acceleration aligns with the direction of Δv. Caution is advised when applying kinematic formulas, as they are typically for 1D motion with constant acceleration. Understanding these principles is crucial for solving similar physics problems effectively.
ahmed emad
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Homework Statement


If my car was moving to the right then I changed direction of motion to down, and the speed is constant and =5m\s, how to calculate acceleration

Homework Equations


Δv=vf-vi

The Attempt at a Solution


Make vectors addtion and use pythagorean theorem formula, so change in v will be : 5✓2.
 
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Looks like you found the magnitude of the change in velocity. But that's not the acceleration. (How much time was involved?)
 
Sorry i forgrot write it , time is 2s
 
OK, so how do you calculate average acceleration?
 
A=∆v/t so 5✓2 /2 , is that right?
 
ahmed emad said:
A=∆v/t so 5✓2 /2 , is that right?
Looks good. But don't forget to attach the appropriate units.
 
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But is the direction of acceleraion will be the direction of ∆v? And can I use kinimaticts fourmlas with this acceleration?
 
ahmed emad said:
But is the direction of acceleraion will be the direction of ∆v?
Yes, the direction of the average acceleration will be in the direction of Δv.

ahmed emad said:
And can I use kinimaticts fourmlas with this acceleration?
What did you have in mind? Is there more to this problem? (Be careful not to apply formulas meant for 1D motion with constant acceleration.)
 
No it's just was an addition from me , thank you so much , I understood it.
 
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