Finish Class discussion problem
Doctor SPLASH
Calculate: Using Work and energy
- v impact
- Change in KE
- Work by the water
- F avg on impact
- use the video to accomplish this
- try using Impulse as well
Objectives :
After studying the material of this chapter, you should be able to:
1. Distinguish between work in the scientific sense as compared to the colloquial sense.
2. Write the definition of work in terms of force and displacement and calculate the work done by a constant force when the force and displacement vectors are at an angle.
3. Use graphical analysis to calculate the work done by a force that varies in magnitude.
4. Define each type of mechanical energy and give examples of types of energy that are not mechanical.
5. State the work energy theorem and apply the theorem to solve problems.
6. Distinguish between a conservative and a non-conservative force and give examples of each type of force.
7. State the law of conservation of energy and apply the law to problems involving mechanical energy.
8. Define power in the scientific sense and solve problems involving work and power.
Everything seems to add up...but quick question...if W= integral[Fdx] without any bounds of integration, shouldn't there be a +C after integration...but W=Fx in Physics B. So, why isn't there a +C and what does the +C mean in this context?
ReplyDeleteCan you post the questions for back on track and the pendulum?
ReplyDeleteHi Mr. Crane, I'm unsure of how to find the height for the pendulum problem. Are we finding the height of the actual pendulum or the height that the block went up?
ReplyDeleteThe height that the block went up
DeleteBut I think you're supposed to be finding v initial
DeleteFor the pendulum problem, I think the height of the device or radius if you look at it that way, is needed. Does anyone have it? Thank you
DeleteThat's true, but you need to have the height in order to solve for the V initial because height is part of the potential energy.
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteDoes anyone have the height of the actual pendulum? I forgot to take the measurement of the string.
ReplyDeleteHey Mr. Crane, I'm a bit lost on the ballistic pendulum problem regarding it's X and Y components (if that's even the right way to go...) and how the whole collosion relates to height like MGH for PE... Any little things I'm not factoring in? I would also be very appreciated if anyone could fill me in more about the in class lesson about springs today! Thanks!
ReplyDeleteOk. The initial collision occurs is linear. The second part involves work which is not a vector. So essential the use of vectors for the solution is not required...
ReplyDelete