The answer is ultra violet radiation. From the air
Answer:
delta r(x) = (delta (r)) * cos(alpha), delta r(y) = (delta(r)) * sin(alpha)
Explanation:
Well it's a simple rule I guess...
Answer:
E. The wheel with spokes has about twice the KE.
See explanation in: https://quizlet.com/100717504/physics-8-mc-flash-cards/
First we will find the speed of the ball just before it will hit the floor
so in order to find the speed of the cart we will first use energy conservation
![KE_i + PE_i = KE_f + PE_f](https://tex.z-dn.net/?f=KE_i%20%2B%20PE_i%20%3D%20KE_f%20%2B%20PE_f)
![\frac{1}{2}mv_i^2 + mgh = \frac{1}{2}mv_f^2 + 0](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7Dmv_i%5E2%20%2B%20mgh%20%3D%20%5Cfrac%7B1%7D%7B2%7Dmv_f%5E2%20%2B%200)
![\frac{1}{2}(1.25)(52)^2 + 1.25(9.8)(225) = \frac{1}{2}(1.25)v_f^2](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%281.25%29%2852%29%5E2%20%2B%201.25%289.8%29%28225%29%20%3D%20%5Cfrac%7B1%7D%7B2%7D%281.25%29v_f%5E2)
So by solving above equation we will have
![v_f = 84.3 m/s](https://tex.z-dn.net/?f=v_f%20%3D%2084.3%20m%2Fs)
now in order to find the momentum we can use
![P = mv](https://tex.z-dn.net/?f=P%20%3D%20mv)
![P = 1.25 \times 84.3](https://tex.z-dn.net/?f=P%20%3D%201.25%20%5Ctimes%2084.3)
![P = 105.4 kg m/s](https://tex.z-dn.net/?f=P%20%3D%20105.4%20kg%20m%2Fs)