- #1
imsmooth
- 152
- 13
My daughter showed me a question:
Car A and B have equal mass and go up a hill. A has twice the constant velocity of B. Compared to B the power of A is?
I found these answers here which seem to miss the point:
https://answers.yahoo.com/question/index?qid=20070331204221AAtxncN
The answer stated is 2x
However, the KE is 4x greater for car A than B.
Also, the time for car A to go up is 1/2 that of B because of the doubled velocity.
Since Power is work/time shouldn't the power of A be 8x greater than B?
Car A and B have equal mass and go up a hill. A has twice the constant velocity of B. Compared to B the power of A is?
I found these answers here which seem to miss the point:
https://answers.yahoo.com/question/index?qid=20070331204221AAtxncN
The answer stated is 2x
However, the KE is 4x greater for car A than B.
Also, the time for car A to go up is 1/2 that of B because of the doubled velocity.
Since Power is work/time shouldn't the power of A be 8x greater than B?