Answer:
The kinetic energy of the baseball is GREATER than the golf ball.
Explanation:
Choices #1, #4, and #5 are true.
Choices #2 and #3 aren't.
Answer: 7.723s
Explanation:
given data:
initial velocity = 7.56 m/s.
friction = 0.0695.
change in velocity = 2.32 m/s
<u><em>Solution:</em></u>
![ax = \frac{-Fk}{m}](https://tex.z-dn.net/?f=ax%20%3D%20%5Cfrac%7B-Fk%7D%7Bm%7D)
![ax = \frac{-ukFN}{m}](https://tex.z-dn.net/?f=ax%20%3D%20%5Cfrac%7B-ukFN%7D%7Bm%7D)
![ax = \frac{-ukmg}{m}](https://tex.z-dn.net/?f=ax%20%3D%20%5Cfrac%7B-ukmg%7D%7Bm%7D)
![ax = -ukg](https://tex.z-dn.net/?f=ax%20%3D%20-ukg)
![recall = v0x +axt](https://tex.z-dn.net/?f=recall%20%3D%20v0x%20%2Baxt)
![.......eqn1](https://tex.z-dn.net/?f=.......eqn1)
![........eqn2](https://tex.z-dn.net/?f=........eqn2)
![eqn 2](https://tex.z-dn.net/?f=eqn%202)
![t = \frac{vx -v0x}{-ukg}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7Bvx%20-v0x%7D%7B-ukg%7D)
![t = \frac{2.32m/s - 7.56m/s}{-(0.0695)(9.80m/s^{2})}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B2.32m%2Fs%20-%207.56m%2Fs%7D%7B-%280.0695%29%289.80m%2Fs%5E%7B2%7D%29%7D)
![t= 7.723seconds](https://tex.z-dn.net/?f=t%3D%20%207.723seconds)
Answer:
The fraction of kinetic energy to the total energy is
.
Explanation:
displacement is one third of the amplitude.
Let the amplitude is A.
x= A/3
The kinetic energy of the body executing SHM is
![K = 0.5 mw^2(A^2 - x^2)\\\\K = 0.5 m w^2 \left ( A^2 -\frac{A^2}{9} \right )\\\\K = 0.5 mw^2\times \frac{8A^2}{9}......(1)](https://tex.z-dn.net/?f=K%20%3D%200.5%20mw%5E2%28A%5E2%20-%20x%5E2%29%5C%5C%5C%5CK%20%3D%200.5%20m%20w%5E2%20%5Cleft%20%28%20A%5E2%20-%5Cfrac%7BA%5E2%7D%7B9%7D%20%5Cright%20%29%5C%5C%5C%5CK%20%3D%200.5%20mw%5E2%5Ctimes%20%5Cfrac%7B8A%5E2%7D%7B9%7D......%281%29)
The total energy is
![T =0.5 mw^2A^2 ..... (2)](https://tex.z-dn.net/?f=T%20%3D0.5%20mw%5E2A%5E2%20.....%20%282%29)
Divide (1) by (2)
![\frac{K}{T}=\frac{8}{9}](https://tex.z-dn.net/?f=%5Cfrac%7BK%7D%7BT%7D%3D%5Cfrac%7B8%7D%7B9%7D)