- #1
Mistakes in Kinematics Problem: A Lesson in Precision and Accuracy
- Thread starter alingy1
- Start date
- #2
Doc Al
Mentor
- 45,586
- 2,466
Looks like a mistake.alingy1 said:
- #3
- #4
Doc Al
Mentor
- 45,586
- 2,466
You are right. They made a mistake.alingy1 said:
What book are you using?
- #5
alingy1
- 325
- 0
It's a bunch of review problems my teacher sent me "at our own risk."
But, since I'm not really an ace in physics, I try to confirm the mistakes as much as possible.
But, since I'm not really an ace in physics, I try to confirm the mistakes as much as possible.
- #6
alingy1
- 325
- 0
Another mistake spotted?
They made a mistake with the *10^4. Should be 10^3. Angles do not change (they are good).
The final velocity should be 12.07m/s, IE 43.45 km/h.
By the way, should we not express scientific notation with only numbers from 1 to 9? Why do they put 10.1 x 10^4 etc...?
I'll refer this page to my class. They'll be glad :)
They made a mistake with the *10^4. Should be 10^3. Angles do not change (they are good).
The final velocity should be 12.07m/s, IE 43.45 km/h.
By the way, should we not express scientific notation with only numbers from 1 to 9? Why do they put 10.1 x 10^4 etc...?
I'll refer this page to my class. They'll be glad :)
Attachments
- #7
Doc Al
Mentor
- 45,586
- 2,466
I guess he didn't double check them for errors.alingy1 said:
Good idea. It's good practice.
- #8
Doc Al
Mentor
- 45,586
- 2,466
Yes, another mistake.alingy1 said:
As long as they do it right, it doesn't really matter. (Though you are correct.) But that's their first mistake: The momentum values are off by a factor of ten: they have 29.2 x 10^4 instead of 2.92 x 10^4, etc.
Good!