# Search results

1. ### Conservation of Momentum in Two Dimensions involving a barge collision

No, I haven't. That's why I'm here. What do I do?
2. ### Graph and graphing question

How should you graph the function y = (5/x^2) -3 so that it looks linear? Can you explain your reasoning?
3. ### Conservation of Momentum in Two Dimensions involving a barge collision

A barge with mass 1.50 X 10^5 kg is proceeding downriver at 6.2 m/s in heavy fog when it collides with a barge heading directly across the river (see the poorly drawn image, in link)http://img.photobucket.com/albums/v638/ravenatic20/untitled4.jpg [Broken]... The second barge has mass 2.78 X...
4. ### Impulse and Momentum change

A 300 g ball with a speed v of 6.0 m/s strikes a wall at an angle of 30 degrees, and then rebounds with the same speed and angle. It is in contact with the wall for 10 ms. (a) What is the impulse on the ball from the wall? (b) What is the average force on the wall from the wall? What...
5. ### Translational Momentum of a particle

The car's momentum is 1600*1.2 kg-km/hr? That being 1920. What would the units be? Now my momentum is 80*Vu kg-km/hr where Vu is your velocity? Where do I go from here?
6. ### Translational Momentum of a particle

Suppose that your mass is 80 kg. How fast would you have to run to have the same translational momentum as a 1600 kg car moving at 1.2 km/h? I happen to know the answer is 24 km/hr. But, how do I get to this answer? What are the steps? Could someone solve it out and show me how they got it...
7. ### Applying Newtons Laws to solve this

I know, but I need to solve this problem. What do I do?
8. ### Applying Newtons Laws in a 'cable car' situation

http://img.photobucket.com/albums/v638/ravenatic20/cablecars.jpg [Broken] Like my MS Paint skills? haha The image shows a section of an alpine cable-car system. The maximum permissible mass of each car with occupants is 2800 kg. The cars, riding on a support cable, are pulled by a second cable...
9. ### Applying Newtons Laws to solve this

Luggage is transported from one location to another in an airport by a conveyor belt. At a certain location, the belt moves down an incline that makes an angle of 2.5 degrees with the horizontal. Assume that with such a slight angle there is no slipping of the luggage. Determine the magnitude...
10. ### Initial speed of a thrown/falling stone

OK, but I still don't know the initial velocity. If I did your equation, would it look like this? x=u(1.00)+1/2(9.8m/s^2)1.00^2 ???
11. ### Stopping a car.

Time is not my luxury here. What is the next thing I do?
12. ### Initial speed of a thrown/falling stone

What does the u stand for in your eqation? How can I get a (acceleration) solved?
13. ### Sliding down a pole

Is the firefighter's actual weight the force of gravity that acts on him, 712 N? I happen to know the answer is 494 N up, and 494 N down. Now, how do I get to this answer?
14. ### Stopping a car.

v^2 = v_0^2 + 2 a \Delta x Would this be it?
15. ### Initial speed of a thrown/falling stone

Anyone have ideas to get me started. I'm not sure what to do next.
16. ### Sliding down a pole

So are you saying you would add gravity and the 3.00 m/s^2?
17. ### Stopping a car.

Does anyone have an idea as to what the next step is?
18. ### Hang Time

OK then, but I'm still not sure what to do next.
19. ### This should be my last one

OK, this should be my last question. Again, I need an answer soon, but I'm also here to learn. Two Blocks are in contact on a frictionless table, one larger than the other. A horizontal force is applied to the larger block, pushing against the smaller block. (a) If m_A = 2.3 kg (the larger...
20. ### Hang Time

The acceleration would be caused by the initial jump upwards? And then gravity pulling him back down? Acceleration is increasing speed, right?
21. ### Stopping a car.

I haven't, I don't even know where to begin. That's why I'm here. Once I get started, things should start clicking. Does the mass of the car have anything to do with how long it will take to slow down?
22. ### Hang Time

I'm not sure that I can answers those. The acceleration is not constant though I know, seeing as it changes direction at some point. Other than that, I'm just about clueless.
23. ### Sliding down a pole

The force pulling him down? Gravity, at -9.8 m/s^2, right? As for the net force, or the force of the pole, I'm not sure.
24. ### Sliding down a pole

A firefighter with a weight of 712 N slides down a vertical pole with an acceleration of 3.00 m/s^2, directed downward. What are the magnitudes and directions of the vertical forces (a) on the firefighter from the pole and (b) on the pole from the firefighter?? I think the magnitudes would be...
25. ### Hang Time

Not exactly, I guess that's why I'm here. I assume the player will be in his top 15.0 cm for a longer time than the bottom 15.0 cm, since the player has to slow down when he's in the air, reverse his direction, and speed up again (downward).
26. ### Initial speed of a thrown/falling stone

Another question, I may have more. The reason I'm here is to do some homework due soon. I'm also here to learn, but the sooner the better. A stone is dropped into a river from a bridge 43.9 m above the water. Another stone is thrown vertically down 1.00 s after the first is dropped. Both...
27. ### Hang Time

Here with a question, and I'm a bit crunched for time. I'm also here to learn, too. A basketball player, standing near the basket to grab a rebound, jumps 76.0 cm vertically. How much total time does the player spend (a) in the top 15.0 cm of this jump and (b) in the bottom 15.0 cm? Does this...
28. ### Stopping a car.

OK, I have some homework, due soon, and could use some help. If you can give me an answer and show me how you got it, great, but I'm here to learn too. A car with a mass of 1300kg is initially moving at a speed of 40 km/h when the brakes are applied and the car is brought to a stop in 15 m...
29. ### Homework - more of a survey

For one of my homework questions, I need to ask 2 to 3 people a question regarding Newton, then write an essay on it. Newton's First Law states that an object will move with a constant velocity if nothing acts on it (but I'm sure you all knew that). This seems to contradict our everyday...
30. ### Computing average velocity

1.74 seconds So is that my answer for this problem? Thanks!