MARK ME BRAINLIEST PLEASE!!!!!
The total energy TE = mgh + 1/2 mU^2; where h = 20 m, g = 9.81 m/sec^2, and U = 10 mps. When the ball reaches max height H, all that TE will be potential energy PE = mgH = TE.
So there you are. TE = mgh + 1/2 mU^2 = mgH = TE from the conservation of energy. Solve for H.
1) H = (gh + 1/2 U^2)/g = h + U^2/2g = ? meters where everything on the RHS is given. You can do the math.
2) As the ball drops from H to h, it picks up KE as the potential energy mgH is converted when the potential energy is diminished to mgh, where h < H. So PE - pe = ke = mg(H - h) = 1/2 mv^2 so solve for v = sqrt(2g(H - h)) and, again, everything is given. You can do the math.
3) Same deal as 2) except now its V = sqrt(2gH) because all the PE = mgH = 1/2 mV^2 = KE when it is about to hit the ground. You can do the math.
Kinetic energy is movement so A
Potential is still so false
Answer:
Explanation:
It is true: the fundamental rule for the attraction and repulsion of magnets is magnetic forces follow the inverse-square law.
The force is given by
It is true: opposite charges attract each other and like charges repel.
It is true: like poles repel each other; opposite poles attract.
It is not true: magnetic poles attract other magnetic poles.
1.548 km i believe. since 60 minutes times 0.88 equals to 52.8 minutes and the bird travels 3 times his speed 52.8 times 3 = 154.8 then you convert that to km and its 1.548 km