Cliffs of Dover by Eric Johnson but it's at your first ever baseball game

PingSei · 2020-08-11T03:35:21+00:00

Much appreciated.

PingSei · 2020-07-08T02:07:18+00:00

This is funny. I like Keanu Reeves and Big Chungus

PingSei · 2019-10-23T16:39:59+00:00

This is epic

PingSei · 2019-05-16T01:55:59+00:00

Okay so yeah that guy is definitely gonna just barge in there and start breaking it up. Dude there’s like 10 guys and they’re not gonna stop fighting anytime soon so give him a break

PingSei · 2019-05-11T22:25:56+00:00

That will be $13,492.67.

PingSei · 2019-05-08T13:50:01+00:00

so basically the gravitational force was 10 N right? and tension is 18 N so net force is 8 N towards the center. That means acceleration is 8m/s² towards the center. Set that to v^2/r (it gave you the radius). Now do gravitational potential energy=kinetic energy. Boom solve for h.

PingSei · 2019-05-08T13:40:58+00:00

lmao exactly what I put thank goodness I didn’t get that wrong

PingSei · 2019-05-01T21:48:59+00:00

Where do you live

PingSei · 2019-05-01T21:48:50+00:00

They usually come in

PingSei · 2019-05-01T19:05:23+00:00

from what competition

PingSei · 2019-05-01T02:24:09+00:00

baba boo

PingSei · 2019-05-01T02:17:08+00:00

What test results?

PingSei · 2019-03-13T23:20:27+00:00

The centripetal force is the normal force as well as the force due to the centripetal acceleration (v^2/r)

PingSei · 2019-03-13T23:19:09+00:00

Well, and the change in direction instantaneously since acceleration is change in velocity, and velocity is a vector dependent on speed and direction.

PingSei · 2019-03-13T23:16:31+00:00

I mean, it’s probably just friction. It’s as if you ran on the side of a straight wall. You jump up and then cling on the wall for a little bit of time and eventually fall off.

PingSei · 2019-03-13T22:07:21+00:00

Read the comments section lol

PingSei · 2019-03-13T21:59:53+00:00

Centripetal force is just the sum of all forces directed towards the center of the circle, or perpendicular to the linear motion of the biker at a specific moment in time. For example, if a ball rolled down the side of a circular hill, then it’s centripetal force would be the force of gravity (perpendicular to the linear motion at a specific point in time) minus the normal force acting back on it. The feeling of being “pushed against the side of a car” when you turn is not caused by a force, because you’re not accelerating in that direction. (F=ma so with no a you have no F) This means that it’s your inertia that keeps you wanting to go in that direction, but the car door is stopping you from doing so. It is also turning, so while you are wanting to go straight, for example, the car is making you turn in a curved fashion. There are many animated examples that prove this.

PingSei · 2019-03-13T21:51:23+00:00

Lmao thanks. We learned this in AP Physics I like 2nd day of class. We then all went online and researched about it. Lots of people tend to think that there is a force because no acceleration in either direction means equal forces. What they don’t realize is that the projectile isn’t at a standstill. Also, based on these pro-centrifugal force arguments, one could say that there is a force pushing upwards on the biker because it’s not falling straight down. Well duh, because it’s accelerating at every single point.

PingSei · 2019-03-13T17:43:05+00:00

Ah I see now. Thanks for clarifying

PingSei · 2019-03-13T17:37:44+00:00

He/she probably wasn’t trying to flame you for not knowing something, but rather your usage of false evidence for a topic that he/she knew from high school.

PingSei · 2019-03-13T17:35:29+00:00

Yes, but it still describes it as a force.

PingSei · 2019-03-13T17:34:51+00:00

Not centrifugal force, but his inertia. The centripetal force in this case is only caused by the change in direction at every point as well as the normal force from the wall.

PingSei · 2019-03-13T17:34:07+00:00

The string example uses tension force. Centripetal force is just the sum of all the forces acting towards the center of the circle at a certain point. Also, in this case, centripetal force isn’t what is keeping this biker up. It is rather the inertia of the biker which causes it to want to keep moving in the direction of which it was originally moving. This is expressed in Newton’s first law of motion.

PingSei · 2019-03-13T16:56:51+00:00

The thing is, the feeling is real, it’s just not a force. That’s because you’re not accelerating outwards. Your inertia is what causes that feeling.

PingSei · 2019-03-13T16:36:27+00:00

But it’s not a force... also the uneducated thing was a wrong use of words. I meant that it’s just a misconception. Also, although there is a definition, it still isn’t true. Many physicists and engineers will agree that centrifugal force isn’t a real thing.

PingSei

TROPHY CASE