- #1
Neon32
- 68
- 1
Homework Statement
Inital energy=Final energy
K.Ei+P.Ei=K.Ef+P.Ef
The position of m3 when m5 hits the ground is 4 m high above the ground and m3 will come to rest after that.gneill said:Describe the state of m3 (position, velocity) at the instant m5 hits the floor. What do you expect to happen to m3 after that instant?
It's the "m3 will come to rest after that" part that you need to look into. How fast and what direction is m3 moving at that instant? Can you think of a way to use energy conservation to find out how high m3 will go?Neon32 said:The position of m3 when m5 hits the ground is 4 m high above the ground and m3 will come to rest after that.
m3 is moving up and with velocity 4.43m/s at the instant m5 hits the groundgneill said:It's the "m3 will come to rest after that" part that you need to look into. How fast and what direction is m3 moving at that instant? Can you think of a way to use energy conservation to find out how high m3 will go?
So it starts this phase of its journey at a height of 4m and moving upward with velocity 4.43 m/s. Thus it has some initial PE and KE. What happens to the PE and KE from there?Neon32 said:m3 is moving up and with velocity 4.43m/s at the instant m5 hits the ground
So you mean in the second case, the m3 will start from height 4m and velocity 4.43m and go some distance above 4m?gneill said:So it starts this phase of its journey at a height of 4m and moving upward with velocity 4.43 m/s. Thus it has some initial PE and KE. What happens to the PE and KE from there?
height approximatley equal 5.001 m.gneill said:That looks good. What do you find for the new height?
Remember to round to the correct number of significant figures. But otherwise, that looks great!Neon32 said:height approximatley equal 5.001 m.
Thanks for taking the time to help me. Appreciated :).gneill said:Remember to round to the correct number of significant figures. But otherwise, that looks great!
The law of conservation of energy states that energy cannot be created or destroyed, but can only be transferred or transformed from one form to another. This means that the total amount of energy in a closed system remains constant.
Conservation of energy is important because it is a fundamental law of physics that helps us understand and predict the behavior of energy in various systems. It also allows us to make more efficient use of energy resources and minimize waste.
Conservation of energy is applied in everyday life in many ways, such as turning off lights and appliances when not in use, using public transportation or carpooling to reduce fuel consumption, and using renewable energy sources like solar or wind power.
In theory, yes, energy can be completely conserved in a closed system. However, in reality, there is always some amount of energy lost to heat or other forms of energy that are not easily usable. This is known as energy dissipation.
Conservation of energy is closely related to climate change because the burning of fossil fuels, which release large amounts of carbon dioxide and other greenhouse gases, is a major contributor to the increasing levels of energy in the Earth's atmosphere. By conserving energy and using renewable sources, we can reduce our carbon footprint and help mitigate the effects of climate change.