Anyone know if the following statement is true (and why)?
"Getting to higher ground would increase his gravitational potential energy, decreasing the effects of non-conservative forces, which would allow him to move easier."
CLARIFICATION: "move easier" refers to a lack of friction and not the...
Where does the Coefficient of Restitution equation come from, in terms of the Conservation of Energy?
The measure of efficiency is the velocity after the collision divided by the velocity before the collision, but how does it get to that point? I'm trying to view this focused on an object that...
This is word-for-word what we are learning in my beginner´s physics class. Although it may not exactly be correct, does anyone have an answer under these circumstances? This all we learned on the topic at this point.
When using the work-energy theorem (Wnet=ΔE), when do you take gravitational potential energy into account? Change in energy implies all types of energy involved, but in what cases would PEg be a part of it?
Homework Statement
How much work does gravity do when a 3 kg brick falls 15 m?
Homework Equations
W=Fx?
The Attempt at a Solution
I transferred the mass of the brick to weight (gravitational force) and got 29.4. I used this number for the force and the 15 for distance, or x. Does 441 J make...
Alright. So take a woman weighing about 50kg running uphill. If the hill is 5m, how much power would be required for her to reach the top in 3 seconds? (Sorry, this is sort of a bad example, but I figured it kind of demonstrates the format.) Does the process I explained work for this?
Homework Statement
A 95-kg mountain climber hikes up a mountain to an elevation of 5000 m. What is the change in the climber's potential energy?
Homework Equations
I might be missing something but here's everything that might be relevant:
w=fx
p=w/t
p=f*v
KE=1/2mv^2
PEg=mgh
PEe=1/2kx^2
Wnet=E...
How should power be calculated in a situation where distance and time are both given, as well as mass. At first, I was thinking of just using W=Fx (force as mass x 9.8) to solve for work, and then I would take the solution for work and put it into P=wt.
Does this make sense? That's my best...