Physics, 23.12.2020 04:50 flores1717

A golf ball with a mass of 46g is hit from the ground with a speed of 20m/s. It takes that ball 1 second to reach its highest point. For all parts assume that the air resistance is negligible. The system includes the golf stick, golf ball, and Earth. I created an energy bar chart attached below. The part where I'm getting stuck is figuring out what is doing the negative work. At first I thought it was the Earth but it can't be because it is part of the system. Then I started doubting my energy bar chart. The final Ug would be mgh so I did m=0.046(covert from g to kg), g=-10, and h=5(figured out using kinematics). The Ug would then be -2.3. But wouldn't it have to be positive 2.3 for energy to be conserved? But at the same time, how can it be positive; g is always negative? So please clear up this problem, I've been stressing on it too much.

Answers: 3

Show answers

Another question on Physics

Physics, 21.06.2019 17:20

Research the neutrino using the internet and report your findings. in a nuclear decay, the nucleus of an atom splits apart. larger particles can be detected and their masses and velocities can be recorded. explain how the existence and properties of the neutrino could be predicted using the conservation laws.

Answers: 3

Answer

Physics, 21.06.2019 20:00

When someone slams her books on a table the kinect energy is transferred into vibrations that travel to your ears as sound waves which statement describes the movement of those waves

Answers: 1

Answer

Physics, 22.06.2019 03:10

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Answers: 2

Answer

Physics, 22.06.2019 12:30

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

Answers: 3

Answer

You know the right answer?

A golf ball with a mass of 46g is hit from the ground with a speed of 20m/s. It takes that ball 1 se...

Questions