I was thinking that if any two objects meet in a head on collision, the object with less inertia would be the one that changes it direction. No matter what the forces are for each, the same amount of force is going to be acting on them because of Newton's 3rd law.
I think you're right John. Suppose you have a 10kg bowling ball sitting on the ground. You roll another 10kg bowling ball as hard as you can directly at the other one. When they collide, I think they'll roll away at equal speeds. Now say you roll a ping-pong ball at the bowling ball. It will just bounce off without moving the bowling ball much at all. Now roll a bowling ball at the ping-pong ball. It will just send it flying without changing its own velocity much at all. So each time, the force is the same, but the difference in inertia is what determines the objects' movement. -Kevin Meglathery
The action force is the first, most common force that occurs. For example, the action force is a tennis racket hitting the ball, but the reaction force is the ball hitting the tennis racket.
I think that the tension in the rope is just the force that one person pulls at times 2 (or both puls added together; it's the same thing). Because both people pull with the same force in opposite directions, those forces cancel, but they are still present in the rope. I think that you just add the absolute values to find the tension. If you added 100N and -100N, you get zero, implying that the rope has no tension. That doesn't make sense because it's still taut, so there has to be some tension in it. -Kevin Meglathery
I'm getting a little confused. Let me reword the question and see if this is what you're asking. You have a pinata on the ground. Someone throws a bowling ball at the pinata as hard as they can. When the ball makes contact, it pushes on the pinata, the pinata pushes back blah blah blah. This might be where momentum comes into play. The ball has a cetain amount of force keeping it in motion. When the pinata breaks, it can't resist the bowling ball's momentum anymore. -Kevin Meglathery
There is a maximum force object can withstand for sure. If that maximum is exceeded ceded then the force will decrease but still be equal and opposite if there is still contact.
If a smaller object hits a larger object (both going the same speed), the smaller object will obviously get more damaged. However, how come the larger object will move forward longer after it has already had collision with the smaller object? -Catherine Samara
I think its because it has a larger mass causing it to take more for it to slow down. Its like when two cars collide the one that has more mass will continue going because the smaller one doesn't have enough force to stop it.
When is the test due?
ReplyDeleteSunday Night
Delete~Makena
Ok. Thanks. I was just wondering if it had changed.
DeleteOn the calender it says monday, Mr. Crane, any clarification?
DeleteIts due Sunday night at 12:00 P.M. Technically its Monday.
DeleteSunday at 11:59
DeleteSo the deciding factor in which object moves during a collision is inertia, correct?
ReplyDeleteWhat question are you referring to?
DeleteDepending on what question you are referring to, like Derek said, it could be inertia or possibly the force applied.
DeleteI was thinking that if any two objects meet in a head on collision, the object with less inertia would be the one that changes it direction. No matter what the forces are for each, the same amount of force is going to be acting on them because of Newton's 3rd law.
DeleteI think you're right John.
DeleteSuppose you have a 10kg bowling ball sitting on the ground. You roll another 10kg bowling ball as hard as you can directly at the other one. When they collide, I think they'll roll away at equal speeds.
Now say you roll a ping-pong ball at the bowling ball. It will just bounce off without moving the bowling ball much at all.
Now roll a bowling ball at the ping-pong ball. It will just send it flying without changing its own velocity much at all.
So each time, the force is the same, but the difference in inertia is what determines the objects' movement.
-Kevin Meglathery
That explanation really clarified a lot for me Kevin, so thank you. It also gives a good reference to Newton's Cradle and how it works.
DeleteI wonder if there is an equation for determining inertia using mass.
DeleteI'm sure there is. There is probably an equation for just about everything.
Delete-Kevin Meglathery
There most likely is, since equations display relationships and physics is all about understanding those relationships.
DeleteYes. The larger the mass and acceleration, the greater the force, thus more inertia.
DeleteFor question 34, is it referring to the name of the force or the amount of force? or something else?
ReplyDeleteI believe it is the amount of force.
Deletei was confused with this because isn't it the same action just causing a reaction on the ground?
DeleteWhat does it mean when it says consider the action force?
ReplyDeleteThe action force is the first, most common force that occurs. For example, the action force is a tennis racket hitting the ball, but the reaction force is the ball hitting the tennis racket.
Deleteis there an equation to find tension?
ReplyDeletelooking at the front page of the packet helped me with that question
DeleteFor number 22, what equation are you supposed to use? I left my packet at home.
ReplyDeleteHave we ever discovered a way to determine the tension within a piece of rope, during a game of tug-of-War?
ReplyDeleteI think that the tension in the rope is just the force that one person pulls at times 2 (or both puls added together; it's the same thing).
ReplyDeleteBecause both people pull with the same force in opposite directions, those forces cancel, but they are still present in the rope.
I think that you just add the absolute values to find the tension.
If you added 100N and -100N, you get zero, implying that the rope has no tension. That doesn't make sense because it's still taut, so there has to be some tension in it.
-Kevin Meglathery
*pulls
Delete-Kevin Meglathery
Kevin that makes sense-clears up some questions I had.
Delete~Molly Lawlor
Ok if there is nothing to pull back on the rope what would the tension be? 0? Just look at each individual object, the try to answer the question.
DeleteWhen an object is hit by something and it breaks, does it still exert the same amount of force back?
ReplyDeleteI think so. They still exert the same force on each other, but one object can't handle it and breaks.
Delete-Kevin Meglathery
Then why does the object continue moving?
DeleteI'm getting a little confused. Let me reword the question and see if this is what you're asking.
DeleteYou have a pinata on the ground. Someone throws a bowling ball at the pinata as hard as they can. When the ball makes contact, it pushes on the pinata, the pinata pushes back blah blah blah. This might be where momentum comes into play. The ball has a cetain amount of force keeping it in motion. When the pinata breaks, it can't resist the bowling ball's momentum anymore.
-Kevin Meglathery
There is a maximum force object can withstand for sure. If that maximum is exceeded ceded then the force will decrease but still be equal and opposite if there is still contact.
DeleteOk, that makes sense now. Thank you Mr. Crane.
Delete-Kevin Meglathery
If a smaller object hits a larger object (both going the same speed), the smaller object will obviously get more damaged. However, how come the larger object will move forward longer after it has already had collision with the smaller object?
ReplyDelete-Catherine Samara
I think its because it has a larger mass causing it to take more for it to slow down. Its like when two cars collide the one that has more mass will continue going because the smaller one doesn't have enough force to stop it.
DeleteI believe the answer is the same as the one above my Mr. Crane.
DeleteOkay thank you!
ReplyDelete-Catherine Samara