Basic physics Definition and 150 Threads

I am enrolled in ILC independent study to earn a Gr. 11 Physics credit. I took gr. 10 science as a prerequisite but it turns out I'm stuck right now on Chemistry and the Physics section as I forgot everything from grade 9. This angers me because ILC takes forever (there is a lot of stuff I...

ive been sick a lot lately, and have missed a lot of physics, my worst class, and I am doing all the homework I've missed and can't figure out these 2 problems.everything else has been done. any help, like how to do them, i don't need the answer just how to set it up and such. anything would be...

Physics HWK? Someone help? An airplane flies 200 km due west from city A to city B and then 330 km in the direction of 33.0° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? I got this and its 509 b) Relative to city A, in what direction is...

Homework Statement True or False: To raise a 2.3kg mass from its resting place on a table, more work is done by lifting it diagonally than lifting it straight up. Homework Equations w=fd The Attempt at a Solution True: I argued that although the same amount of force is being...

Basic Physics HW help (URGENT) hey guys. i would like some help on these couple of problems. i solved #1 , the answer is 26.24 i think. for #5 a) the answer is 269.38. Can you give me some tips for 2,6,7,8 ? I need some help on those >< please its urgent., THANKS in advance

Homework Statement I really need help on these two problems, I am not sure where to start and for that reason I do not have an attempt at the problem. I am not asking for anyone to do them for me , but could somone give me the equations or the steps needed to solve? 1. I expend 700 Calories...

*** Basic Physics Homework *** PLEEZ HELP! these are due at 8. i got transferred to this new school and they are much farther ahead of us in the curriclulum please HELP ME :( ANY ANSWERS ARE GREATLY APPRECIATED :D :D :D #4 PART 1 Two cars travel in the same direction along a straight...

Homework Statement A particle that is moving along a straight line decelerates uniformly from 0.4 m/s to 0.2 m/s in 5 seconds and then has a constant acceleration of 0.2 m/s^2 during the next 4 seconds. What is the average speed over the whole time interval? Homework Equations vavg =...

Homework Statement A tennis ball is thrown from ground level with an initial velocity directed 30° above the horizontal. If it takes the ball 1 second to reach the top of its trajectory, what is the magnitude of the initial velocity? Homework Equations The Attempt at a Solution I...

Hi everyone, I would like to ask somebody here that could better understand than me of the following example from a book Physics – Principles with Applications, 3rd ed. by Douglas C. Giancoli, Prentice Hall, page 33. Here is the example http://img231.imageshack.us/img231/8103/fleajb0.jpg"...

I am a Doctor and i am trying to prove a theory concernicg centripetal movements of epithelial stem cells in the human cornea. However my research is about the pterygium, a degenerative lesion of the cornea. I ve proven to be of parabolic form and i know from literature that corneal stem cells...

One of the basic numbers in fundamental physics is 1836.15 the ratio of proton mass to electron mass. This ratio has been measured in a quasar-type galaxy some 8 billion lightyears from us, and it turns out to be the same as here in Milky. You guessed it would be? OK. But still it's good to...

IF a man jumps off a building that is 90 m high, and gravity is 9.8 m/s, and he weighs 80 kg, then what will his velocity be just as he hits the ground?

A chain always breaks ath the weakest link. Right? Hypothetical: Where would a chain break if all the links were of equal strength, shape, shape, size... equal in every way. Ignore all tolerance rules, this is hypothetical! Thanks!

what sort of topics should i be expecting in a basic first year uni physics course? the university websites are too general and don't usually give too much detail when desribing the topics covered

A ball is thrown at a 45 degree angle and lands 90 meters away. What was the intial velocity? Tanner

Homework Statement Question #1: Δd=v¹Δt+½a(t)² Solve for: a Question #2: E= ½ m * v² Solve for: v Homework Equations Δd=v¹Δt+½a(t)² v = Δd / Δt a = v² - v¹ / Δt v² = v¹ + a * Δt Δd = (v² - v¹) * Δt Δd = v¹ * Δt + ½ a ( Δt )² E= ½ m * v² The Attempt at a...

I am very embarrassed to ask these questions because compared to other questions on these boards, these two seem very basic. Nonetheless, I have never taking physics and I am having a hard time grasping its concepts. So here are two simple questions that maybe someone could answer and explain...

Hey guys I need some help, I am struggling in a PH100 class and my professor is not that much help. This problem puzzles me and I have been working on it all night. "Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one...

This is a very basic concept but I can't seem to explain it properly. Say you have a simple bridge made from two bricks that are, say, a metre apart, and a piece of wood spanning them. If you put a load on the wooden bridge, a normal force acts upward on the load. If you keep increasing the...

Do you guys know what book would be the best for learning basic stuff (mechanics, electricity and magnetism) at a much higher and more detailed level than Halliday. I finished the Halliday text and feel like it was very shallow. I'd like to get into the details of the math and physics behind the...

Hey all, I was wondering if someone could explain how to tell whether V = - or +? I'm getting answers right using the formula V^2 = sqrt(Vo^2 + 2ay) but I'm getting positive answers. How do you tell whether the velocity is in the + or - direction? Sample Question: A...

Could someone help me understand the principles behind a few things in physics? I'm trying to build a little side-scrolling space game where you can bolt add-ons and engines to your ship. Each has its own mass (and in the case of engines, their own maximum thrust), and therefore affects the...

A stone is thrown vertically upward at a speed of 49.80 m/s at time t=0. A second stone is thrown upward with the same speed 2.670 seconds later. At what time are the two stones at the same height? i found that to be 6.411s at what hight do the two stones pass each other? ok, so that...

I am just wondering what is exactly expected when asked "express the answer in terms of g, (acceleration due to Earth's gravity). I am thinking it means divide the result by 9.8N? What is the resulting unit? Any help would be appreciated :) Cheers

Hi everyone! This is my first post so I thought it appropriate to start with a basic question and not give u guys a hard time :) ehehe So imagine u have 1 box resting on a larger box. A force is applied to this larger box and the smaller box moves with the larger box without slipage. My...

During volcanic eruptions, chunks of solid rock can be blasted out of the volcano; these projectiles are called volcanic bombs. At what initial speed would a bomb have to be ejected, at angle 35* to the horizontal, from the vent at A in order to fall at the foot of the volcano at B, at vertical...

2 seconds after being projected from ground level, a projectile is displaced 40 m horizontally and 53 m vertically above its launch point. What are the horizontal and vertical components of the initial velocity of the projectile? At the instant the projective ahieves maximum height above...

Hey guys, my name is Gabriel. I no experience whatsoever with physics except this class I've enrolled in called the Basic Physics of Sound. It's suppose to be completely algebra based, I'm just horrible at math in general. I need some help with a couple of problems. Also, if you could tell me...

Absolutely Basic Physics Homework HELP! Hello there! I'm a new member and I have come across to site using google for some basic help on my physics homework!(I have just recenty started physics AP, every bit of material is new to me.) It would be extremely helpful to me if you can also help me...

I don't understand this: A slow car moves at a steady 10 km/hr down a straight highway while another car zooms past at a steady 120 km/hr. Which car is has the greater net force on it? The answer is neither, because the net force on each car is zero. Why is it zero?

It has been years since I have taken physics and for the life of me I cannot figure out how to solve the following real-world problem. Given 2 vehicles a & b: a's speed = 0, weight = 4,250 lbs b's speed = x, weight = 3,260 lbs. After b impacts a from behind and leaving a space of 8 feet...

:frown: I have this example problem and I can't seem to figure out how to do it. it says, there is a 1kg block on an inclined plane, the angle is 45 degrees and the distance of the inclined plane is 10m. there is a force pulling on it with 25N, it asks what is the work that the normal force...

Ok, here's the deal, this is a physics problem that might seem basic to you. But to me its a pain, I've been working on this problem for 2 days now, and my group members are of no assistance to me. They have different answers than i do which i didn't agree to. The question Jessica runs up a...

Basic physics, need some help :D Hi, first i would like to start of by saying that i am norwegian, so my english skills is not so good. But anyway, I am having this test tomorrow and i need some help! Its about physics! I translated the task as good as i could! To sleds with elastic bumpers...

My friends a pre-med student and he's taking basic phyiscs 1. He asked me to do two problems. Can you double check to make sure I did not tell him the wrong thing! :blushing: Problem 1.) There are two square masses, side by side on a frictionless pond. Mass A is 150kg, and mass b, is...

Hi, I am a grade 12 physics student and my teacher asked us the following question: You have a perfect balance scale, with two identical hourglasses on each end. They each have the exact same amount of sand in them. However, one (hourglass 'A') has all it's sand in the bottom, while the...

A plano-convex glass lens of radius of curvature 1.8 m rests on an optically flat glass plate. Before the lens is placed on the plate a film of oil of refractive index 1.78 is deposited on the plate. The arrangement is illuminated from above with monochromatic light of 480-nm wavelength. The...

Basic Physics...?? Hey Everyone, I just started the course and the first problem I come to, so very confused me! I don't need an answer just a basic response on exactly HOW I can approach this problem because I am just totally blown away by it . Two trains, each having a speed of 30...

A structural I beam is made of steel. A view of its cross-section and its dimensions are shown in Figure P1.11. The density of steel is 7.56 * 10^3 kg/m^3. What is the mass of the section 8.5 m long? Figure P1.11 (shown below) I tried doing this by: 1) changing the 8.5 m into cm...

Hi , I want to know the rigorous mathematical definition of displacement, which is applicable to physics ? All we are taught is that its a vector quantity as opposed to a scalar such as distance. And I have a velocity time graph, which again, I am not too sure on a few aspects of it...

I was just wondering, can you name of the books, which they are kind of basic, and explains all the formula's. Just name the books that's all.

I'm an adult doing the self-education thing, having dropped out of high-school (big mistake, incidentally). I have a couple basic physics questions that I can't seem to find the answers to: 1) If F=ma, why do all objects the same distance from the Earth's surface accelerate at 9.8 m/s^2...

I can NOT figure this question out, it's the only one I haven't gotten, can someone help? The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x-axis with a velocity of +5.5 m/s. It makes a collision with puck B, which...

Hey This summer, I plan on participating in an entry exam for medicine. It requires a basic knowledge on biology, mathematics, chemistry and physics. I had a classical high school education, so very light on sciences. Biology and maths should be no problem; chemistry and physics are giving me...

a couple of "basic" physics problems i am stuck on a couple of my homework problems for my "basic" physics class. any help with either of them would be greatly appreciated. 1. a window washer pulls herself up in a bucket-pulley apparatus (single massless, frictionless pulley). how hard must...

Hello again all. This is my 6th posting requesting some assistance for some new physics problem. It is getting a bit easier to understand but I would like some review and comments on the following problems. My answers are marked with an astericks. You do not have to necessarily provide me...

Which pulls harder gravitationally? the Earth on the moon, or the moon on the earth? Which accelerated more? i know this is easy, but don't they pull the same, and accelerate the same?

Actually, I guess I have two questions... OK, if a 2 Kg bird wants to drop at a rate of 1.2 m/s^2, what is the magnatude and direction of the force that the bird must exert? (Answer is 17.2 N, but I don't understand what work to do to get it) As for the second: If a car with a mass of...

Hi all! I am new to the forum and I have a few lower level physics problem with which I am confused. Any help and explanations will be immensely appreciated! 1) A steel pipeline is 1500 m long and is at a temperature of 30 degrees Celcius. How much shorter will it be if the temperature...