Recent content by jubbly

Homework Statement A frictionless plane is 11.4 m long and inclined at 39.4◦. A sled starts at the bottom with an initial speed of 4.46 m/s up the incline. When it reaches the point at which it momentarily stops, a second sled is released from the top of this incline with an initial...

Fixed it a little, but still getting a pretty high number. Is that really the answer?

Homework Statement Two carts with masses m1 = 0.8 kg and m2 = 1.2 kg are moving toward each other with speeds v1 = 4.5 m/s and v2 = 3.8 m/s as shown in the diagram below. The two carts collide elastically. Some reason I'm getting too high of a value, don't know I'm doing wrong...

Homework Statement Was wondering if I did this right, don't know if I used the right equation. Equation: Ba(NO3)2 + Na2(SO4) = Ba(SO4) + 2Na(NO3) Volume of barium nitrate: 5mL Molarity of Barium nitrate: .1M Homework Equations Molarity = moles/L The Attempt at a Solution...

For my physics house project, it says i have to have 2 lights connected in parallel with one switch and unequal brightness, using a resistor. Is there anyway to do this?

Hey guys, I was just wondering what is an error during a lab? I always get these parts wrong on my lab, mainly because I don't know of any errors that are occurring in a lab. For my lab I was using a ballistics pendulum and sometimes the rod wouldn't pull back right or shoot right. Would that...

Hey guys, I have some questions about this ballistic pendulum http://image.made-in-china.com/2f1j00nMvTZeBzkLoC/Ballistic-Pendulum.jpg My partner and me were discussing what kind of collision it made. I think it's an elastic since we placed a ball in the rod then pulled...

Homework Statement A rock is dropped from the Washington Monument which is 555 feet tall. Using the formula h(t) = -16t^2 + volt + ho , find approximately how long it will take for the rock to hit the ground. Homework Equations h(t) = -16t^2 + volt + ho The Attempt at a Solution...

Oh, now I understand. Thanks for clearing things up for me!

I don't know about properly making one, but I do know what it is. So if I drew one at an angel of 0 it would look like a straight line with an object in the middle? Then I would draw a arrow below the object labeling that Fg and on top of the object would be FN. Is there anything else I am...

It's just a table, titled analysis of forces. I am supposed to use the weight, angle, and tension given to find the perpendicular, parallel and normal forces. The weight I have is -10 at an angle of 15 degrees and the tension is 1.5. Sorry if I can't be anymore clearer than this, not very...

I'm just analyzing forces with numbers given to me. The weight, tension, and the angle is the only given I have.

Hey guys, I was wondering if you can help tell me if I am doing this right for finding the parallel and perpendicular force. To find the parallel force would I have to take: gravity*sin(theta) or would I have to take the weight? Same goes with the perpendicular force, but using cosine...

So Vo=4.43, and would I need to find the time? At this part I'm confused as to what to do to find the vertical velocity. Is there a formula I would have to use to find it?

Oh, sorry! Find the vertical velocity of a projectile launched from a catapult. The projectile landed 5 meters from the catapult and went up in the air 1 meter.