Finding velocity use energy conservation help

In summary, energy conservation is related to finding velocity because it allows us to use the principle of conservation of energy to calculate an object's velocity. This can be done using the equation Ki + Pi = Kf + Pf, but it is limited by the assumption that all energy in the system is accounted for. Energy conservation can be applied to all types of motion without external forces, but may be more complex in situations with changing forces or mass.
  • #1
xbebegirlx
11
0
A .145kg drop from sixth story building window. If each story is 2.5m tall, use energy conservation to find the rock velocity when it strikes the ground. (ignore air resistance)

I have:
mass .145kg
h 2.5m each story
2.5m * 6 = 15m (total height)
gravity 9.8ms^2
V=?
I am confuse, what is energy conservation?
please help me to start this
 
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  • #2
mgh=0.5mv^2
2gh=v^2
v=sq root(2gh)
 
  • #3
thanks got it
 

1. How is energy conservation related to finding velocity?

Energy conservation is related to finding velocity because it allows us to use the principle of conservation of energy, which states that energy cannot be created or destroyed, only transferred or converted. By applying this principle, we can use the initial and final kinetic and potential energies of an object to calculate its velocity.

2. What is the equation for finding velocity using energy conservation?

The equation for finding velocity using energy conservation is: Ki + Pi = Kf + Pf where Ki is the initial kinetic energy, Pi is the initial potential energy, Kf is the final kinetic energy, and Pf is the final potential energy.

3. Can energy conservation be applied to all types of motion?

Yes, energy conservation can be applied to all types of motion as long as there are no external forces acting on the object. This includes both linear and rotational motion.

4. Are there any limitations to using energy conservation to find velocity?

One limitation of using energy conservation to find velocity is that it assumes all the energy in the system is accounted for and there are no losses due to friction or other factors. In reality, there may be some energy lost due to these factors, resulting in a slightly different velocity calculation.

5. Can energy conservation be used to find the velocity of an object at any point in its motion?

Yes, energy conservation can be used to find the velocity of an object at any point in its motion as long as the initial and final kinetic and potential energies are known. However, it may be more complicated to apply in situations where there are changes in external forces or the object's mass during its motion.

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