# physics please HELP !

128,227 results, page 64

### English to Writeacher

Yes, I know how to write a thesis statement and how a comparison essay goes.. But I already have my info: This is a comparison essay exploring to what degree an inherent film is discussed and how it relates to an aspect of the HUMAN CONDITION. So my theme is revenge and the ...

### To Desire

Your posts have been removed, mainly because you have given absolutely no thought to how you'll solve those problems in your assignment. In the future, please remember these things: 1. This is a homework help website; please put your subject (math, science, English, or ??) in ...

### physics (please help elena)

Three planets interact with one another through their mutual gravitational forces only; they are isolated in free space and do not interact with any other bodies. They orbit around an axis going through the center-of-mass of the system and perpendicular to the triangle formed ...

### Physics

A wheel with a weight of 395N comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at an angular velocity of 23.0rad/s . The radius of the wheel is 0.607m and its moment of inertia about its rotation axis is 0.800 MR2. ...

### physics ( please help me)

Ice hockey star Wayne gretzky is skatin at 13.0 m/s^1 towards a defender, who is in turn skating at 5.0 m/s^-1 toward gretzky.gretzky's weight is 756 N, that of the defender is 900 N. Immediately after the collision. gretzky is moving at 3.00 m/s^-1 in his original direction. ...

### physics

A 87.2 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 44.2 m behind the ship, at rest relative to the spaceship. The only way to return to the...

### physics

A 87.2 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 44.2 m behind the ship, at rest relative to the spaceship. The only way to return to the...

### physics

A wire has a resistance of 27.2 ohms. It is melted down, and from the same volume of metal a new wire is made that is 3 times longer than the original wire. What is the resistance of the new wire? Resistance and length of wire are proportional, but what I am unsure of is if ...

### Physics II

Two long straight parallel wires separated by L2 = 8.16 cm carry currents of equal magnitude but heading in opposite directions. The wires are shown perpendicular to the plane of this page. Point P is L1 = 1.96 cm from wire 1 and the magnetic field at point P is 1.22 x 10−2 ...

### physics

You observe someone pulling a block of mass 48 kg across a low-friction surface. While they pull a distance of 3.0 m in the direction of motion, the speed of the block changes from 4.9 m/s to 7.7 m/s. Calculate the magnitude of the force exerted by the person on the block. ...

### Physics(please bobpursley)

A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 6.7 m/s. The coeﬃcient of kinetic friction between the sled’s runners and the hard, icy snow is 0.048, and the girl and sled together weigh 615N. The acceleration of gravity is 9....

### Maths

In a survey of 200 students of a school, it was found that 60% study mathematics, 45% study physics, 35% study chemistry, 20% study mathematics and physics, 15% study physics and chemistry, 25% study chemistry and mathematics and 10% none of these subjects. Find the number of ...

### College Physics

A paratrooper w/ a fully loaded pack has a mass of 120kg. The force due to air resistance on him when falling w/ an unopened parachute has magnitude F(sub)d = bv^2, where b=0.14 N*s/m^2. a) if he is falling w/ an unopened parachute at 64m/s, whats is the force of air ...

### Physics Force and Friction question

A crate of mass 100kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A horizontal force, F, or magnitude 350N is applied to the crate. Which of the following is true? ...

### Physics (PLEASE HELP)

Two slits are 0.144 mm apart. A mixture of red light (wavelength = 665 nm) and yellow-green light (wavelength = 565 nm) falls on the slits. A flat observation screen is located 2.11 m away. What is the distance on the screen between the third-order red fringe and the third-...

### calculus Please Help

The cost for a toy company to produce x Cosmic Starships is C(x) = 1400 + 6x − 0.01x2. What ￼￼￼￼￼￼￼￼￼￼is the marginal average cost function? Can someone please explain how to do this to I have no idea ...

### Physics

The hydrogen atom contains 1 proton and 1 electron. The radius of the proton is approximately 1.0fm femtometers, and the radius of the hydrogen atom is approximately 53 pm (picometers). - Calculate the volume of the nucleus and the volume of the atom for hydrogen. - What ...

### physics

Two identical small spheres of mass 2.0g are fastened to the ends of an insulating thread of length 0.60m The spheres are suspended by a hook in the ceiling from the centre of the thread. The spheres are given identical electric charges and hang in static equilibrium, with an ...

### spanish

please explain to me what the quesiton and answers mean. "¡Cuando llovió anoche, se apagaron todas las luces de la casa y no pude ver nada!" "¡Qué lástime! Debes tener una linterna con buenas _____ en caso de emergencia." a. pilas b. monedas c. llaves d. secadoras "when ...

### algebra help please

A bus leaves a station at 1p.m. traveling west at an average rate of 44 mi/h.one hour later a second bus leaves the same station traveling east at a rate of 48mi/h. At what time will the two buses be 274 miles apart I know that I am suppose to use d=r*t 1st bus d=44*t 2nd bus ...

### Physics

Two electrostatic point charges of +60.0 uC and +50.c uC exert a repulsive force on each other of 175 N. What is the distance between the two charges? So let's say I use Coulomb's law would the repulsion of 175 N be considered the equivalent of the electric force? Can someone ...

### Physics

Please check my answers!! 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? I got 2223.375 Joules after Damon helped me...am I right...

### physics

i need help....please If you Fourier sample the state 1/√22(|000>−|001>+|010>−|011>+|100>−|101>+|110>−|111>), which of the following states can be the outcome of your measurement? Select all that apply. 1. |000> 2. |001&...

### Math Symbols

PLEASE ANSWER MY LAST POST (MATH SYMBOLS) PLEASE I REALLY NEED SYMBOLS

### Language Art (Please Check...again)

1)Resilient people usually a)complain when they have bad luck b) bring good luck to others c)are able to deal with others** 2)when the someone refers to pausing to " enjoy the view of the trees and the flowers below," he really is talking about a) looking down at the view from...

### Algebra 2

Completing the square method allows you to solve any quadratic equation. For each of the following determine what number completes the square. I cannot find my notes on completing the square, can someone please help with these two problems? 1. x^2+8x 2. y^2+10y i don't know ha...

### english

We have to do an oral commentary and analyze an poem that can be related to structuralism. We read a book called the educated imagination, and that book explains the idea of structuralism. Can somebody please suggest an poem that would be good for this assignment? and also, ...

### R.E

Please tell me who are the 5 Prophets? I have a bible (christian i think..) crossword and it has a few questions on it at the bottom and one of them is the 5 Prophets. I can give a list of names, but please can you tell me out of the names who the 5 prophets are? Thanks Amos, ...

### ENGLISH!!

What should i write about for the topic: responsibility for watching over your little brother....also explain the various ways you kept him safe...etc. and how you felt responsible for that person. Please give me lots of ideas about what to write for that topic (i have to ...

### Math please help

According to a study conducted by a statistical organization, the proportion of americans who are satisfied with the way things are going in their lives is 0.82. Suppose that a random sample of 105 Americans is obtained. (Please answer the below and round to four decimals ...

### Algebra/ please help!!!!

Wage $17hr-- Annually/$28,285.28 Apartment Value 17.34hrs/pay period toward apartment $934/month Annually $11,208.00 Total Annually $39,498.28 Working 40 per week/52 weeks per year I can't figure out the breakdown of how they arrived at these numbers. PLEASE HELP

### physics

I was wondering if this formula is dimensionally correct: v = Square root FX/m divided by mass v= m/s F= kgm/s^2 X = meters divided by mass (kg) v = root kgm * m s^2 ------ kg My half solution: m/s = root kgm^2 s^2 ------ root kg m/s = m/s root kg --- the kg cancels root kg ...

### Physics

def of average velocity = t^-1 (x - x0) (average velocity = t^-1(x-x0))t=(avearge velocity)t + x0= x - x0 + x0 = x = (average velocity)t + x0 x = (average velocity)t + x0 def of average velocity were costant acceleration is assumed = 2^-1(v0 + v) plug into x = (average ...

### algebra

in a class of 30 students , there are 22 students who study chemistry but not physics, 4 who study physics but not chemistry and who study neighter chemistry nor physics. how many students in the class study physics

### 12th grade

Okay I am doing a report on Thurgood Marshall. I am to a part where I am writing a little about his presidential nominations. Please help me on this! What exactly is a second court of appeals judge's job? What about a Supreme Court Justice? I am trying to say maybe a sentence ...

### Physics

Two students are on a balcony 19.6 m above the street. One student throws a ball (ball 1) vertically downward at 15.8 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the balcony on the way down...

### Physics

In a Physics laboratory class, an object of mass 2.1 kg, attached by massless strings to two hanging masses, m1= 1.0 kg and m2= 4.0 kg, is free to slide on the surface of the table. the coefficient of kinetic friction between m2 and the table is 0.30. calculate the ...

### physics

Some of the branches of physics that you will study in this course investigate motion, the properties of materials, sound, light, electricity and magnetism, properties of atoms, and nuclear reactions. Give at least one example of an application of each branch.

### physics

Some of the branches of physics that you will study in this course investigate motion, the properties of materials, sound, light, electricity and magnetism, properties of atoms, and nuclear reactions. Give at least one example of an application of each branch.

### Physics

After solving a difficult physics problem, an excited student throws his book straight up. It leaves his hand at 2.5 m/s from 1.5 m above the ground. A) How much time does it take until the book hits the floor? B) What's its velocity then?

### Physics Lab Question, Help Please

Two speakers, A and B, are emitting identical, synchronized (in-phase) sound waves at 240kHz. A person standing a point C hears a relatively loud sound. She then starts walking towards point D, and notices the sound gets quieter, reaching a minimum when she arrives at D. The ...

### math please help imedietely

The stadium capacity allows for players, radio and newspaper reporters, and stadium workers in addition to spectators. How many of these people could be at a game? Victory Stadium: Stadium Capacity - 42,500 General Admission Seating - 31,750 Reserved Seating - 10,475 Please ...

### social studies

prepare a defence for the proposition that the Divine Right of Kings is necessary to good government. i don't get it. what does this mean? and i don't even understand the Divine Right of Kings, it was written in old english. please help me. and it also says that rewrite this ...

### Algebra-please check

Please check these: 1.When the fraction 2/3 is used as exponent, wht role does the denominator 3 play in evaluating expression? I think it indicates cube root of the base,correct? 2.sqrt of (2^4x/4^-2x) is equilvalent to 2^4x, correct? 3.Simplify (2xy^-2z^4/y^-3/z^3)^2 would ...

### Math 8R - HW Qs. Check

Topic - Logic In the clues below, each variable represent a different digit ranging from 0-9. Determine what digit each variable represent g+g+g = d (3+3+3 = 9) j+e = j (2+0 = 2) g (to the 3rd power) = d (3, to the 2nd power = 9) b+9 = d (6+3 = 9) f-b = c (7-6 = 1) i+h = a ...

### PLEASE HELP W/ COMPUTER SCIENCE?? JUST 1 PROBLEM?

Write a complete Main method that prints Hello, world to the screen. I have tried: MsgBox("Hello, World!") Console.WriteLine("Hello, world") MessageBox.Show("Hello, world") Almost every way that seems correct. Please help me.

### Science-QUICKLY PLEASE!!

13. Which invention below would not have been possible without the pioneering research of German-American physicist Albert Einstein, American physicist Robert Oppenheimer, and Italian-American physicist Enrico Fermi? a. computer microchip b. nuclear reactor c. television d. ...

### Math please help thnks

A silver dollar is dropped from the top of a building that is 1398 feet tall. Use the position function below for free-falling objects. (Round your answers to 3 decimal places.) s(t) = -16t2 + v0t + s0 (a) Determine the position and velocity functions for the coin. s(t) = v(t...

### English

Please help write a reaction on this Article, I want to give good presentation. How can I make it interesting? Thank you! So, far I think the Author is Energy literate and motivates readers through his words. Please tell me how I can include "Energy conversion, Energy ...

### Physics

This has been posted before but I need someone to elaborate please. A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 19.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The ...

### Physics. PLEASE HELP!!

Consider a wheel (solid disk) of radius 0.748 m, mass 16 kg and moment of iner- tia 1/2 MR^2 . The wheel rolls without slipping in a straight line in an uphill direction 27 above the horizontal. The wheel starts at angular speed 20.5882 rad/s but the rotation slows down as ...

### CALCULUS WXMAXIMA !!PLEASE!

y=log(100493/40000*x-1) y=atan(100493/40000*x+1) y=exp(-100493/40000*x+1) Note you will need 2 integrals to represent the area. Approximate the area of the region bounded by the given curves. I can do it with two but kinda struggling over here please helppp!

### chem -please help!!!!!!!!!!!!

An unknown compound, X, is though to have a carboxyl group with a pKa of 2.0 and another ionizable group with a pKa between 5 and 8. When 75 mL of 0.1M NaOH is added to 100 mL of a 0.1M solution of X at pH 2.0, the pH increases to 6.72. Calculate the pKa of the second ...

### 6th Grade Probability

The probability of winning a game is 25%. How many times should you expect to win if you play 36 times? A. 3 times B. 7 times C. 9 times (I think it's the answer) D. 11 times Please help me! If I'm wrong can someone please explain to me why and the correct steps and answer. ...

### geomety please help

the perimeter of a recatngle is 54 inches. The width is one inch less than the lenght. FInd the length and width. I just don't understand how to find the length and width if i am only givent eh perimeter please show work thank you

### physics please help me

I am solving a problem and someone tol me to use this formula MgH = (1/2)*k*(H-2-10)^2 + Mg*2 where did this equation come from. Its not in my book. What concepts does it use? Is it solved correctly? MgH = (1/2)*k*(H-2-10)^2 + Mg*2 MgH = 0.5k(H-12)^2 + 2Mg MgH = 05k(H^2 - 24H...

### math

please i need this question answered in a hurry how do you make a fraction as a decimal (Well i know how to do that) But how do you round the decimal to the nearest hundredth i need it answered in a hurry please

### High School

Please provide me some links to websites where I can buy and download US High School text books. I am now in a UK based school in Asia but I will be moving to America next year. So please provide useful links.

### algebra

Please help....struggling with word problems and please explain how to get the answer.... Max has a collection of 210 coins consisting of nickels, dimes, and quarters. He has twice as many dimes as nickels, and 10 more quarters than dimes. How many coins of each kind does he ...

### English

I have to write an essay on "Why is college important to me" and I have to find two references and each reference must use quoted passage. Where can I find references for this topic because it's asking for my opinion please u need help please tell me what references to use

### math

suppose im trying to build a rectangular garden but I only have 24 meters of fence to use. so what is the largest area I can make my rectangular garden? please help I don't get it! I have to use the USE format and I don't get the question can you just explain please?

### chemistry

1.2 mol HCl and 3.9 mol NaOH react to this equation, HCl + NaOH=NaCl + H20 If the limited reactant id HCl, calculate the amount of NaCl formed in moles. Please help and explain how to solve this so I may understand it better please and thank you.

### Account,communication-skill,Economics,Business Law

Make a speech,Your md is 70year. Please state your question clearly. Please also note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a tutor with this specialty online ...

### Chemistry(Please check)

.50 - x / x = 3.20e-1 I need to solve for x. I was going to do .50 X 3.20e-1 and then take the square root but this is not correct. I am not sure what to do. Thank you for your help. Math(Please help) - Reiny, Tuesday, April 17, 2012 at 3:18pm You probably meant (.50 - x)/x = ...

### college physics

A cylindrical stone column of diameter 2R = 1.47 m and height H = 4.46 m is transported in standing position by a dolly. When the dolly accelerates or decelerates slowly enough, the column stands upright, but when the dolly’s acceleration magnitude exceed a critical value ac...

### Physics

2.0 kg weight is on simple, horizontally oscillation (in a spring) with the time 1.8 s. The distance between the outmost dots in the oscillation is 0.16 m. a) What is the angular speed (w) of the oscillation ? b) What is the force constant (k) of the spring? c) What is the ...

### Math (Very Easy Math)

I'm kind of confused as to what simplified mean? Can you please provide me with a definiton... Like I'm kind of stumped as to what one is more simplified -7(2x + 3) or -14x -21 Please explain what it mean for an expression to be "simplified"

### Trig

can I please have help with these 3 questions? 1. Solve this equation graphically on the interval [0, 2ð]. list the solutions. sin(2x)-1=tan x 2. solve sin x cos x= sqrt3/4 3. solve tan^2 x-3tan x+2=0 thank you! show step by step please.

### college algebra--please help

what does Descartes rule of signs tell you about the possible number of positive real number zeros and the possible number of negative real zeros of the function? 1. f(x)=2x^5-5x^2+x-1 2. f(x)=5x^6+7x^4-x-6 please show work

### English Writing

Please help me... People believe in God because... And there is life on earth because... And people who believe in God think that God has put human beings on this earth because... I have to write continue of these sentences... Could you guys help me please?

### math

1)Question : granny georgette and kiwi have a combined age of 77 if kiwi is 13 years less than twice granny georgette age how old is kiwi. please check my answer and correct me if i'm wrong. please. . . . thanks thanks

### economics

please please please please help me this is due tomorrow!!! this is a table with some questions and i don't know how to solve it (1)real domestic output (GDP=DI) in billions $200 $250 $300 $350 $400 $450 $500 $550 (2)aggregate expenditures private closed economy billions $240...

### physics- please help me!

Earth turns on its axis approximately once every 24 hours. The radius of Earth is 6.38 X 10^6 m. a.) If some astronomical catastrophe suddenly brought Earth to a screeching halt (a physical impossibility as far as we know), with what speed would Earth's inhabitants who live at...

### physics

A cylindrical space colony 8 km in radius and 60 km long has been proposed as living quarters for future space explorers. Such a habitat would have cities, land and lakes on the inside surface and air and clouds in the center. All this would be held in place by the rotation of...

### Physics please help

The gun, mount, and train car of a railway had a total mass of 1.22 x 10^6 kg. The gun fired a projectile that was 80 cm in diameter and weighed 7502 kg. In the firing, the gun has been elevated 20 degrees above the horizontal. If the railway gun at rest before firing and ...

### geometry

graph the following 2 graphs - y=2x+3 and y=2x-4. a)state the intersections on the y axis and the x axis. b)what is the vertical and horizontal difference between the two graphs? PLEASE help i don't understand? I know how to graph the eqautions but not too sure about the ...

### Social Studies

Who are some famous people that were born in France? Please give me someone who has lot's of info not just 2 or 3 notes. I need someone famous who has lot's and lot's of notes. I tried typing it on google and I found nothing! Please help me! Thanks...

### phyics (PLEASE PLEASE READ)

a model rocket rises with constant accerleration to a height of 3.2 m, at which point its speed is 26.0 m/s. (a) how much time does it take for the rocket to reach this height? (b) what was the magnitude of the rocket's acceration? (c) find the height and speed of the rocket 0...

### Chemistry - help please

In an experiment, when 25 mL of 5.5 x 10^-3 M NaOH is mixed with 30 mL of 7.5 x 10^-3 M Fe(Br)2, a hydroxide compound is formed (Ksp = 1.8 x 10^15). Which of the following describes the resulting solution? a. The product is unsaturated b. The mixture product is saturated c. ...

### physics

Can you please help me find the theory of Robert Hooke on Wave Explanation of Colors. Please... My report about this is due on Monday. Thank you for helping. God bless. According to (Broken Link Removed) , "Robert Hooke (1635-1703) who started as an assistant to Robert Boyle, ...

### Physics please help

The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four railway cars having a ...

### Physics - Quidditch

For the second part: The draw the plane vector which is the same as the desired results. At the end of the plane vector, draw the wind vector. That is where the plane will end up. So, for a 1/2 hour flight: (80 km/h) * (hour/2) at 30 degrees E of S. or 40km at 30 degrees E of ...

### Physics

An athlete finished the 100 meter race in 10sec. What was his average speed? acceleration? Acceleration time? Acceleration distance Help with few questions already got the already got the first two V=d/t =100m/10s =10m/s and Acceleration= Vf-Vi/t =10m/s-0/10s =10m/s^2 how to ...

### Calculus!!!

I need your help... I've posted this question a while ago but no one has answered it yet. Please please help me. Which of the following series can be used to compute ln(.8)? a) ln(x-1) expanded about x=0 b) lnx about x=0 c) ln x in powers of (x-1) d) ln(x-1) in powers of (x-1...

### physics

Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's observing the trout is 45 degrees. b) ...

### Physics

Ok, my Physics professor gave us this to do uncertainty propagation with these equations. Can some please show me some examples on each of these so I know I'm doing them right? Uncertainty Propagation Since raw data includes uncertainty, all calculations include uncertainty. ...

### Physics

A vector drawn 55 mm long represents a velocity of 25 m/s. How long should you draw a vector to represent a velocity of 17 m/s? please help me!! 55mm is to 25m/s as X is to 17m/s...maybe? thanks..i tried that and the answer was wrong...these questions are just really tricky. ...

### Physics - please check over

A charged particle moves at a constant velocity in a straight line through a region in space... a) is the electric field zero in the region? Explain b) is the magnetic field zero i the region? Explain I think a is yes because a charged particle will always create an electric ...

### physics

Curve A is banked at 11.2 °, and curve B is banked at an angle of 15.2 °. A car can travel around curve A without relying on friction at a speed of 14.5 m/s. At what speed can this car travel around curve B without relying on friction? Do I need to find radius in order to ...

### SAT MATH

I don't remember what problem I struggled to understand... But it was something like this... There are 3000 numbers so how many of them are odd.. SometI don't remember what problem I struggled to understand... But it was something like this... There are 3000 numbers so how ...

### Chemistry

Hi can someone please help with this question, or atlest direct me in the right direction. Please and thank you. The initial rate of reaction H2O2(aq) --> H2O (l) + 1/2 O2(g) is found to be1.7*10^-3 M/s . Assume that this rate holds for 2 minutes. Start with 165ml of 1.55M ...

### please check my work language

-write the plural for each noun potato-potatoes shoe-shoes auto-autos speech-speeches -describe the kinds of information about words that can found in a dictionary *prononciation *parts of speech *definition and the word *how many syllabuls a word has is there anything else ...

### Algebra

Fiona invested $1000 at 8% compounded continuously. At the same time Maria invested $1100 at 8% compounded daily. How long will it take for their investments to be equal in value? Assume there are 365 days in every year. Please help I have tried everything and cannot solve ...

### Chemistry

Balance the equation: NO2- (aq) + Al (s) --> NH3 (g) + AlO2- (aq) (basic solution) ** please note the "2-" on the NO2- and AlO2- are not subscripts, they are the charges. I missed a few classes in Chemistry and find myself lost. I have tried to learn these equations with ...

### Math help please ASAP

2. Simplify the polynomial. –3f^2 + 4f – 3 + 8f^2 + 7f + 1 5f2 – 11f + 2 11f2 + 11f + 2 5f2 + 11f – 2 –5f2 + 11f – 2 No idea how to do this please explain!!!!

### Physics. PLEASE HELP!!

A 1.3 kg steel ball and 8 m cord of negligi-ble mass make up a simple pendulum that can pivot without friction about the point O. This pendulum is released from rest in a horizontal position and when the ball is at its lowest point it strikes a 1.3 kg block sitting at rest on ...

### Math(Please check)

For an experiment on specific heat capacities of metal in physics, I am trying to calculate my percent error but am having some trouble. After collecting my experimental data for c (cal/g) for the object that was used which was aluminum my results are: trial 1 = .19 trial 2...

### Physics

Two cars lost in a blinding rainstorm are traveling across a large field, each thinking they are on the road. They collide. If the distance between them is 174 meters and the red car is traveling at 6 mph at a 45 degree angle toward the impact point, and the blue car is ...

### Physics

A 1.8 tonne railway truck moving at a speed of 3m/s up a steady incline comes to a stop after 45m. If the sum of the friction opposing the truck amounts to 80N What is the angle of elevation of the slope? I found Fg using m*g THen I tried using v^2=u^2 + 2as to find the ...