# Search results

1. ### 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?
2. ### 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...
3. ### 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...
4. ### 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...
5. ### 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...
6. ### 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...
7. ### 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...
8. ### 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...
9. ### 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...
10. ### 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...
11. ### 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...
12. ### 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...
13. ### Computing average velocity

I'm not looking for answers so much, just someone to get me started. OK, you walk 73.2 m at a speed of 1.22 m/s, and then run 73.2 m at 3.05 m/s along a straight line. What is the average velocity of that problem? Next I need to graph x vs t for the problem, and indicate how the average...
14. ### Average acceleration of an object

Here's my question: An object has a speed of 18 m/s at a certain time, and 2.4 seconds later, it's speed is 30 m/s in the opposite direction. So my question is, what were the magnitude and direction of the average acceleration of the object during this 2.4 second time period? And, if you give...
15. ### The least constant acceleration

OK, heres the problem: A large plane needs to get to a speed of 360 km/h on it's runway in order to take off. The runway is 1.8 km long. What would be the least constant acceleration required to take off? Physics just started, I need shock paddles to get me going again :surprised Thanks
16. ### Acceleration in g units

Question: An object is moving on land at a speed of 1020 km/h. This object goes from full speed to a complete stop in 1.4 seconds. In g units, what acceleration did the object 'experience' while stopping? My guess is I have to plug in -9.8 m/s into this equation, but I'm not sure how. Any...