Mech King,
I'm sure I read something in a book about a similar system. It was a long time ago, but if my memory serves me right, it mentioned something about a "3 moment system". I'm sorry I can't help you more.
jehan60188,
I believe you should write your report to include the un-successful model and explain how you redesigned the new model to fix what was wrong with the old one. Learning from your mistakes is much more valuable than getting it perfect first time.
When a phase change occurs, heat energy is used to break or make bonds in the structure (absorb or release energy respectively). The energy is not effecting the internal energy of the substance therefore the temperature remains the same throughout the change.
Hi, I'm just a first year student but I think I have an input.
The forces would still be in equilibrium as I assume that the wall could match a reaction force much greater than the force it takes for the rope to snap as I believe rope is a brittle material. Sorry if I'm completely wrong, just...
Hi mrphobio,
You're using the equations the wrong way round.
The energy stored in the spring (0.5kx2) with spring constant k and compression of the spring x.
Since energy can't be destroyed, it is transformed into kinetic energy, and finally into potential energy (mgh) with mass m and...
Why are you using 30° as your angle when it states in the question that it is 34°?
Your x component isn't the same as your y component, which would be the normal force (Fn). You must also consider the acceleration of the concrete block in your calculations.
Welcome to PF,
Have you drawn your free body diagram? How did you get your x and y components? The question states that the slope is at a 34° angle to the horizontal, not 30°.
Hint: Friction force = μN
Hint 2: Remember to add units to EVERYTHING.
It is assumed that acceleration is equal to 0 as the block just starts to slide. Hence the forces in play are equal, otherwise the friction force would be less than ma and the equation would become an inequality.
Hi,
I don't think your steam tables consider the circumstances that the problem gives you, the temperature would probably increase slightly (I'm just a student, not nearly as good as other people on this forum).
However, looking through my steam tables, I found that hf @ 243.3kPa =...
kgal,
From what I can gather, you don't have enough information given to you to solve for velocity, time of flight and maximum height directly. Try drawing what you see. The best method I use to solve projectile motion problems is to split the problem up into two parts - the object rising, &...
Welcome to PF.
I think the question is asking you to make an equation for acceleration and then using basic kinematics (or kinetics, I forget which is which) to find equations for velocity and displacement.
Show us what you've already done.
Welcome to PF.
Have you heard of the 4 constant acceleration questions? As this is freefall, acceleration (g) is constant, therefore that's the route I'd go down.