Answer: A... Thermal energy from the ice is transferred to the air.
Explanation: because I just know.
Answer:
Ep = 3924 [J]
Explanation:
To calculate this value we must use the definition of potential energy which tells us that it is the product of mass by the acceleration of gravity by height.
![E_{p}=m*g*h\\](https://tex.z-dn.net/?f=E_%7Bp%7D%3Dm%2Ag%2Ah%5C%5C)
where:
Ep = potential energy [J] (units of Joules)
m = mass = 40 [kg]
g = gravity acceleration = 9.81 [m/s²]
h = elevation = 10 [m]
![E_{p} =40*9.81*10\\E_{p} = 3924 [J]](https://tex.z-dn.net/?f=E_%7Bp%7D%20%3D40%2A9.81%2A10%5C%5CE_%7Bp%7D%20%3D%203924%20%5BJ%5D)
The velocity of tennis racket after collision is 14.96m/s
<u>Explanation:</u>
Given-
Mass, m = 0.311kg
u1 = 30.3m/s
m2 = 0.057kg
u2 = 19.2m/s
Since m2 is moving in opposite direction, u2 = -19.2m/s
Velocity of m1 after collision = ?
Let the velocity of m1 after collision be v
After collision the momentum is conserved.
Therefore,
m1u1 - m2u2 = m1v1 + m2v2
![v1 = (\frac{m1-m2}{m1+m2})u1 + (\frac{2m2}{m1+m2})u2](https://tex.z-dn.net/?f=v1%20%3D%20%28%5Cfrac%7Bm1-m2%7D%7Bm1%2Bm2%7D%29u1%20%2B%20%28%5Cfrac%7B2m2%7D%7Bm1%2Bm2%7D%29u2)
![v1 = (\frac{0.311-0.057}{0.311+0.057})30.3 + (\frac{2 X 0.057}{0.311 + 0.057}) X-19.2\\\\v1 = (\frac{0.254}{0.368} )30.3 + (\frac{0.114}{0.368}) X -19.2\\ \\v1 = 20.91 - 5.95\\\\v1 = 14.96](https://tex.z-dn.net/?f=v1%20%3D%20%28%5Cfrac%7B0.311-0.057%7D%7B0.311%2B0.057%7D%2930.3%20%2B%20%28%5Cfrac%7B2%20X%200.057%7D%7B0.311%20%2B%200.057%7D%29%20X-19.2%5C%5C%5C%5Cv1%20%3D%20%28%5Cfrac%7B0.254%7D%7B0.368%7D%20%2930.3%20%2B%20%28%5Cfrac%7B0.114%7D%7B0.368%7D%29%20X%20-19.2%5C%5C%20%5C%5Cv1%20%3D%2020.91%20-%205.95%5C%5C%5C%5Cv1%20%3D%2014.96)
Therefore, the velocity of tennis racket after collision is 14.96m/s