A rough week got worse with the death of a college friend. Test will be tomorrow. Make sure you touch base with me tonight if you have questions as I'll try to be on here from 8-10.
1. 216 J 2. 432 J. Twice the original value. 3. If the mass is the same as the original player, 864 J is the answer. 4 times the original value. 4. 16.46
Total amount of energy is Kinetic + Potential. If one goes down, the other goes up, but since energy can't be created nor destroyed, the TOTAL energy...
Very sorry for your loss. If there is anything we can do for you, please let us know.
ReplyDeletei'm so sorry for your loss.
ReplyDeleteon the practice problems can you please give us the answers so we can make sure we got the right answer.:) please and thank you!!
ReplyDeleteis he on yet.
ReplyDeleteI'm here, but late....I'll post the answers in just a second.
ReplyDeletePleae help with formula for work.
ReplyDeleteI am confused about the question "Explain what happens to GPE as an object is falling......". Can you help me out please?
1. 216 J
ReplyDelete2. 432 J. Twice the original value.
3. If the mass is the same as the original player, 864 J is the answer. 4 times the original value.
4. 16.46
If an object is getting closer to the ground, what is happening to the potential energy? Remember, it's height is doing what?
ReplyDeleteIt is storing up more PE. It's height is decreasing.
ReplyDeleteUse your formula for this. A 1 kg. object falls from a shelf that is 1 m high (on earth of course). What is its GPE?
ReplyDeleteNow, if the object has fallen 0.5 m, now much GPE does it have? Remember, the object is now 1/2 meter lower.
You can still use the same formula for GPE, even if the object is in motion.
ReplyDeleteAre you getting it now?
ReplyDeleteGPE = 1 kg x 9.8 m/s squared x 1m
ReplyDelete= 9.8 m/s squared
4.9 m/s
The GPE decreases as the object falls. KE is decreasing so the TOTAL energy decreases as the object falls.
Also, if the object is accelerating downward, then what is going up?
ReplyDeleteTotal amount of energy is Kinetic + Potential. If one goes down, the other goes up, but since energy can't be created nor destroyed, the TOTAL energy...
ReplyDeleteMy Dad says I am wrong. He says as it falls PE is increasing as it falls. I am confused.
ReplyDeletePotential energy is the energy of position. If the position is lower, then the potential energy must be what? Think for yourself here.
ReplyDeleteKinetic energy is the energy of motion, so if an object is accelerating, then kinetic energy must be...
ReplyDeleteOkay is this right.
ReplyDeleteGPE is decreasing so KE is increasing and the TOTAL energy remains the same.
Remember, 10+0=10, 9+1=10, 8+2=10 etc.
ReplyDeleteAlright, I'm still at the school, and I have to go home for the night. Good night, and God bless.
ReplyDeleteThank you for helping me.
ReplyDeleteI'm very sorry for your loss
ReplyDelete