Saturday

April 25, 2015

April 25, 2015

Number of results: 114,208

**Physics**

Which of the following best describes kinematics? a) Kinematics is a part of mechanics that involves the description of motion. b) Kinematics is the branch of physics that deals with the motion of objects and the action of forces on the objects. c)Kinematics is the study of ...
*September 14, 2012 by Kevin *

**physics**

My teacher needs us to formulate a question for the science fair. Till now, we have only learned the Kinematics equations, HELP, please....
*November 5, 2013 by Lily Gomez*

**Physics**

This question has to do with kinematics graphing. I CAN NOT REPRODUCE THE GRAPH BUT hope that some help can be given to me with this question. The position versus time for a certain object moving along the x-axis. The object's initial position is -2 m. Find the instantaneous ...
*September 4, 2013 by Deawn*

**Physics**

This is a two-dimensional kinematics question: A particle's position coordinates (x,y) are (2m, 3m) at t=0; (6m, 7m) at t=2s, and (13m, 14m) at t=5s. Find the average velocity vector between t=0s and a) t=2s, b) t=5s. I don't know how to find this without acceleration being ...
*September 10, 2010 by Anonymous*

**Physics - urgent ; test Monday**

Divers entertain tourists in Punta Cana by diving froma cliff 36 meters above water. Determine the landing speed; ignore air resistance and assume the object starts from rest. I'm supposed to be using kinematics formulas. I tried using d=V(i)t+1/2at^2 and then plussing the ...
*February 21, 2009 by Li*

**physics **

A door starts from rest and swings with an angular acceleration, alpha, α = 6 rad/s2, where t is in seconds. Determine the angle in radians through which the door turns in the first 3 s. Hint: kinematics equation for angular position (i.e., angle) is exactly the same as ...
*March 1, 2011 by Anonymous*

**physics **

A door starts from rest and swings with an angular acceleration, alpha, α = 6 rad/s2, where t is in seconds. Determine the angle in radians through which the door turns in the first 3 s. Hint: kinematics equation for angular position (i.e., angle) is exactly the same as ...
*March 2, 2011 by Anonymous*

**Physics Kinematics**

A short-putter throws the shot with an initial speed of 16 m/s at a 32.0 degree angle to the horizontal. Question: Calculate the horizontal distance traveled by the shot if it leaves the athletes hand at a height of 2.05 m above the ground?
*June 10, 2012 by Tim Duncan*

**physics**

A 1.31 g samara -- the winged fruit of a maple tree -- falls toward the ground with a constant speed of 1.0 m/s (Figure 5-29). I understand that acceleration equals zero, but I dont understand how to find the upward force need to keep the fruit at 1.0 m/s. Is kinematics ...
*February 5, 2010 by Ryan*

**physics- kinematics**

General question- when do you use NEGATIVE for 9.8m/s^2? Even when the questions says "an object is thrown up in the air from top of the building, on its way down, it misses the building and falls to the ground below." If you do use a negative value, why is that?
*October 2, 2008 by ella*

**Physics**

In physics, how do you solve for the magnitude in 2-D kinematics and what are the x and y-components?
*September 27, 2011 by Astrogirl*

**Physics**

How do I determine the horizontal distance traveled by water passing through a hole of a punctured water bottle. You must use bernoulli's and Kinematics, and find delta x in term of h and y. ( y = the height of water inside the bottle , h = the height of the hole to the floor...
*August 13, 2011 by AfterLife*

**kinematics**

these are two similar kinematics maths question which i dont know. Please help! 1)A particle moves in a straight line so that its distance, s metres, from a fixed point O is given by s = 2t^3 - 3t^2 - 12t + 6, where t is the time in seconds after passing O. Find the minimum ...
*June 19, 2009 by zachary*

**physics**

The vertical leap of a professional NBA athlete is reported to be 47.3 inches. What is his takeoff speed? in m/s? is this kinematics??
*December 10, 2009 by Jan*

**Physics - Kinematics**

Need some help with my homework! Question 7 a) Acceleration is the rate of change of velocity Use your definition in (a) to show that v = u + at, where v is the final velocity, u is the initial velocity and a and t are the acceleration and the time interval respectively. State...
*April 17, 2012 by Iman*

**Kinematics Physics**

Please let me know if someone can help with this subject. I have summer school in physics because I did not get the first semester. I am still not getting it. Alyx Yes, we can help you. Post your questions, show your work, and we'll guide you in the right direction.
*July 29, 2006 by Alyx*

**Physics**

I'm having trouble relating Work, with Electric Field, with Kinematics. The question is asking: How fast and what direction is the particle moving, given: Disk: radius = 0.1m, surface charge density = 3.7mC/m2 Particle: 4.5 mC, mass = 75 mg accelerates from a point ...
*February 14, 2010 by so CONFUSED!*

**Kinematics algebra question - Physics 11**

I don't know how to even approach this... It's suppose to be on my physics test. A huntsman fires a gun pointing at a monkey hanging on the branch of a tree. The huntsman and the base of the tree are on a flat horizontal. At the moment the huntsman fires the gun, the monkey ...
*November 8, 2013 by Raylene*

**Physics**

Rearrange the following kinematics equation for the variable iondicated: a)d=v1t+1/2at^2 i)v1 ii)a b)d=v2t-1/2at^2 i)v2 ii)a
*September 19, 2007 by Katie*

**Physics (Kinematics)**

A race car accelerates uniformly from 10 m/s to 50 m/s in 2 seconds. Determine the acceleration of the car and the distance traveled.
*August 13, 2013 by Ashley*

**Physics (Kinematics)**

A car starts from rest and accelerates uniformly for 10 seconds over a distance of 200 m. Determine the acceleration of the car.
*August 13, 2013 by Ashley*

**physics**

If the angular quantities θ,ω,α were specified in terms of degrees rather than radians, how would the kinematics equations for uniformly accelerated rotational motion have to be altered?
*April 11, 2010 by Charlie*

**Physics (Kinematics)**

A ball is thrown 83.3 m upward and then falls back to earth.Neglecting air resistance, how long will it be in the air? The acceleration of gravity is 9.8 m/s2 . Answer in units of s
*October 6, 2012 by Joy*

**Physics (Kinematics)**

An airplane accelerates down a runway at 100 m/s2 for 15 s until it finally lifts off the ground. Determine the distance traveled before take-off.
*August 13, 2013 by Ashley*

**Physics kinematics**

the general "hang time" of a punt is measured to be 4.5sec. if the ball was kicked @ an angle of 63deg. above the horizontal & was caught @ the same level from which it was kicked, what was its initial speed?
*March 13, 2008 by Lisa*

**Physics**

If a lever has a mechanical advantage of 6, and the distance from the fulcrum to the load is .05m, how far is it from the fulcrum to the effort? I think I'm supposed to use some sort of kinematics formula, but I'm really confused.
*September 27, 2008 by Hannah*

**Physics**

A 400 kg baby grand piano is raised to the roof of a 100 m building. If the cable breaks as it reaches this height, what will its velocity be the instant prior to impact? Use energy considerations and verify using kinematics.
*December 8, 2012 by BA*

**physics**

if the angular quantities theta omega and angular acceleration were specified in terms of degrees rather than radians how would the kinematics equations for uniformly accelerated rotational motion have to be altered
*February 28, 2011 by luna*

**physics**

if the angular quantities theta omega and angular acceleration were specified in terms of degrees rather than radians how would the kinematics equations for uniformly accelerated rotational motion have to be altered
*February 28, 2011 by luna*

**physics- Kinematics-Conversions**

Preform the following conversions. 1)27 ft. is how many cm? 2)10 stone/day is how many lbs/min? 3)53 pits/hr is how many steps/day? if someone could even explain how to do it i'd be really greatful thanks !
*June 10, 2012 by yasmeen*

**Physics Kinematics**

A puck slides across a smooth, level tabletop at height H at a constant speed Vo. It slides off the edge of the table and hits the floor a distance x away. What is the algebraic relationship between the distances x and H?
*February 2, 2015 by Vishal *

**Physics (Kinematics)**

In a television tube, the electron travels from an electron gun to the screen 0.45m away in 6.0×10exponent-9seconds. If the electron starts at rest, what is its final speed when it hots the screen? ( I have the answer,but I don't know how to get it)
*March 5, 2015 by jen*

**Kinematics**

A car has an acceleration of 2 m/s2. What is its speed 3 seconds after it starts moving?
*February 1, 2011 by Randy*

**Physics**

A pinball machine has a spring with spring constant of 125N/m. A 65g ball is placed on the spring and the spring is compressed 5cm. How far along the playing surface makes a 15 degrees angle with the horizontal? ignore friction. How to do this using Energies and Work done? No ...
*April 15, 2013 by Sash*

**11th matriculation physics kinematics**

an aeroplane takes of at an angle of 45deg to the horizontal. If the vertical component of its velocity is 300kmph, Calculate its actual velocity. what is the horizontal component of it velocity?
*July 18, 2010 by shruthi*

**kinematics**

A tennis ball is hit with a resultant velocity of 70 m/s^-1 at 20 degrees. What are the vertical and horizontal velocities?
*April 17, 2011 by Madeline*

**physics - uniform circular motion**

Explain why the kinematics equations which describe the motion of the object that has constant acceleration cannot be applied to uniform circular motion.
*August 23, 2010 by Shaila*

**Physics;Help!!!!!!**

There is apparently no one online who can help with physics questions right now. Please check back later to see if a physics teacher has addressed your question. Multiple posts won't get faster answers. Thanks. =) The question is in the first question marked physics beside ...
*June 7, 2007 by Writeacher*

**Physics: Kinematics**

A speed boat moving at 33.7 m/s approaches a no-wake buoy marker 93.3 m ahead. The pilot slows the boat with a constant deceleration of 2.9 m/s 2 by reducing the throttle. How long does it take the boat to reach the buoy? current work done: x = Vot + (1/2)at^2 93.3 = 0(t) + (1...
*October 29, 2012 by Michelle*

**physics**

A sprinter in a race can run 100m in 11.4 seconds. If it takes him 4.2 seconds to accelerate to top speed, what is the magnitude of his acceleration? Assume that he stays at his top speed from 4.2 seconds till the end. I do not understand which kinematics equation will help, ...
*February 15, 2015 by Allie*

**Algebra HELP!**

Starting with the kinematics equation x = vot + ˝ at^2, derive an expresion relating the acceleration and initial velocity of an object to two paired position and time measurements. In other words, if an object's position is x1 at t1, find the acceleration a and the inital ...
*September 11, 2012 by Jack*

**Physics Changing Acceleration **

Derive position, velocity, and acceleration kinematics equations for an object undergoing a changing acceleration? I understand that somehow we need to get (∆a/∆t) as the change in acceleration into the kinematic equations but I really don't know where to start.
*September 28, 2013 by K*

**Physics Kinematics**

A basketball is launched with an initial speed of 12.0 m/s at 45 degrees from the ground. The height of the basket y = 2.50m. From what distance x the ball is shot? Note : The trajectory is like a basketball shot, the highest point the ball reaches is higher than the basket ...
*February 2, 2015 by Vishal *

**Kinematics**

A car traveling with a velocity of 4 m/s accelerates at 3 m/s^2(squared) for 10 s. How far does the car travel in the 10s?
*June 10, 2012 by Anonymous*

**algebra**

Need some one check my homework. Evaluate 3p/q when p=2 and q=6. Answer:1 Use < > or = for __ to write a true sentence: 0.001 __ 0.0010 Answer:< Question 3 Evaluate -3/8 - 5/8. Answer:7 Question 4 Evaluate: 84 + (-99) + 44 - (-18) - 43 = Answer:4 Question 5 Multiply...
*May 29, 2014 by Lisa*

**kinematics**

An individual's arm segment is .18m long and has an angular velocity of 117degrees/s. What is the tangential velocity of the wrist?
*November 4, 2009 by Dawn*

**Physics**

A 200g box is moving on a table with velocity of 23m/s. There is a coefficient of friction of 0.032 between the table an the box. A force pushes the box for 1.2m which increases the velocity to 28m/s. Calculate the force that was applied. How do we solve this using energies ...
*April 15, 2013 by Sash*

**Physics**

Tarzan plans to corss a gorge by swinging in an arc form a hanging vine. If his arms are capable of exerting a force of 1400 N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? his mass is 80 kg and the vine is 4.8 m long. Ok If i\'m ...
*September 6, 2009 by Physics*

**physics**

Im doing physics 20 in correspondance this summer, and Im stuck on a question about Refraction... and Snell's law. The question is... A ray of light is incident upon a 60-60-60 degree prism, n=1.5. Then it shows a diagram , and it asks to find the angle of reflection.. and ...
*July 30, 2009 by Sam*

**Math...Algebra :S**

Hi, okay um. I'm trying to get his math question (Algebra :o) and i'm not quite sure what i'm doing---but everything i do, i get the wrong answer. The Question is 2m+n M= 2/5 and n= 1/2 (Fractions) Everytime i do the question, i get 9/10 as a answer...but i check the textbook ...
*April 1, 2008 by Dawn*

**physics kinematics **

A red car and green car , identical except for their colours move towards each other in adjacent lanes . At time=0 , the red car is at x=0m and the green car is at x=220m . If the red car has a constant velocity of 20km/h the cars will meet AR x=44.5m and if it has a constant ...
*September 13, 2012 by HW HELP THANKS *

**SHAY**

THE MATH QUESTION IS IT ALGEBRA , PRE ALGEBRA' OR GEOMETRY? Quadriatic functions. so algebra i think.
*January 17, 2007 by ROSA*

**Physics**

Starting with the kinematics equation x = vot + ˝ at^2, derive an expression relating the acceleration and initial velocity of an object to two paired position and time measurements. In other words, if an object's position is x1 at t1, find the acceleration a and the initial ...
*September 11, 2012 by beanstalk1*

**Physics**

Bob jumps from a 2.0 m high table and wants to jump over a 0.85 m radius ball. How fast must Bob move horizontally to not land on the ball? If we use kinematics equations for projectile, the answer is 2.66 m/s; however, with this velocity the person will land on the ball. I ...
*September 19, 2012 by Elaine*

**college algebra**

question 1: build the fraction x+5/x+3 to an equivalent fraction whoes denominator is x^2 question 2: simplify (x^2+6x+9)(3-x)/(x-3)(2x+6) question 3. find the product in simplest from x^3-9x/x^5+27x^2 * x^2-3x+9/x^2+3x
*September 2, 2014 by ashley*

**Linear Algebra 2 question**

Hello, I have another question from my linear algebra class. I'm asked to find the area of a triangle using determinants, but they don't give me the vertices, only the sides. Where A,B,C and D are the vertices, u and v are 2 out of the 3 sides. Now they give me u=(-3,1) and v...
*August 26, 2012 by Robert*

**Algebra 1A**

How is algebra a useful tool? what concepts investigated in algebra can be apply to personal and professional life? I need help answering this question. Please help?
*November 30, 2008 by Julissa*

**Algebra**

I have one more question I need to ask about algebra, this one is a perform the indicated operation question. 4x 5x ----- - ---- x^2-9 x^2+4x-+3 I am really confused on the -+3 part, I don't know if my teacher made a typo or what, because without the - in that part it would be...
*March 18, 2008 by Jeff*

**kinematics**

A projectile is launched with an initial velocity of 25 m/s at a launch angle of 36 degrees. What is the magnitude of the projectile’s velocity when it is 7.5 m above the ground?
*February 6, 2012 by Cody*

**two dimensional kinematics**

If you can throw a stone straight up to a height of 16m, how far could you throw it horizontally over level ground? Assume the same throwing speed and opitimum launch angle.
*October 8, 2012 by ringo*

**Algebra**

please help me with this question. please explain this question to me and how you got the answer to the question. Solve the inequality. > 10 A. y < –16 B. y > –60 C. y > 4 D. y < –60
*July 29, 2014 by Amber*

**Physics - Kinematics**

Qn: Ball 1 is launched up an inclined plane from the bottom of the plane with an initial speed that is the minimum speed for it just to reach the top of the plane. At the same moment as ball 1 is launched up the plane, Ball 2 is released from rest at the top of the plane. They...
*November 25, 2010 by Rod*

**Physics, Kinematics**

You drive with a constant speed of 15.1 m/s for 23.4 s. You then accelerate for 28.7 s to a speed of 25.8 m/s. You then slow to a stop in 37.1 s. How far have you traveled? I've tried dividing this into 3 parts. 1st- constant speed 15.1m/s*23.4s=353.34 m 2nd-accelerating I ...
*December 1, 2011 by Jackie*

**Physics**

A baseball is hit with a velocity of 30 m/s at an angle of 38.2 degrees above the horizontal. An outfielder, who happens to be very good at 2D Kinematics, figures out exactly where its going to land.Knowing he is exactly 8 meters away from the landing point, and that his ...
*September 21, 2014 by Anonymous*

**Please help me with M1 kinematics! **

A particle p is initially at the point (2, 6) in relation to an origin O, and is moving with velocity (3i + j) m/s. It has a constant acceleration (16i + 24j)m/s^2. Show that after 2 seconds it is moving directly away from O and find its speed at that time
*February 26, 2012 by Jat*

**Please help me with M1 kinematics! **

A particle is travelling with velocity (4i+5j)m/s. It undergoes an acceleration of magnitude 2.5m/s^2 in a direction given by the vector (3i-4j). Find the velocity and displacement of the particle from its initial position after 4s.
*February 26, 2012 by Jat*

**12U Physics**

An object is moving down a ramp that has mu=0.150. It initially starts at (0,1), and the bottom of the ramp is at (sqrt(3),0) Show that the parametric down the ramp are given by: ht tp://img819.imageshack.us/img819/5993/screenhunter03dec061758.gif I know the kinematics ...
*December 6, 2010 by Matt*

**Physics**

A steel ball has a mass of 4.0kg and rolls along a smooth, level surface at 62m/s. A) Find its kinetic energy(i got this and its 7688 joules) B)?????-At first, the ball was at rest on the surface. A constant force acted on it through a distance of 22 meters to give it the ...
*November 23, 2008 by URGENT!!!!PLEASE*

**math (college algebra)**

Ok I have two questions I have NO CLUE how to complete on my homework. Please help ASAP! (1) Solve the formula for the specified variable r = vx for r (the question is) v = ? a = 1/3f * p for f (the question is) f = ? (2) Solve the forulma for v S = D + vm (the question is) v = ?
*September 2, 2010 by Sam *

**Physics**

I'm understanding most of this physics, but here is one last question I would appreciate help on. Thank you! Okay, so the question involves a figure. A link to the question and the picture with it is below can be found by googling the question along with Holt physics. The link...
*March 26, 2010 by Demi*

**Algebra (y=kx)**

just read my other question and u will find the question. but i really need he- lp!!!!!!!!!!!!!!!!!!!!!!!!!!!
*December 7, 2008 by josh*

**college algebra**

previous question, can hannah xx please explain how she got the answer to that question
*March 8, 2009 by Joe*

**Physics - 2-D kinematics**

A soccer ball is kicked with an initial horizontal velocity of 20 m/s and an initial vertical velocity of 16 m/s. I've calculated: Initial Speed: 25.61 m/s Angle: 38.66 degrees Maximum Height it reaches: 13.06 m Distance kicked: 65.29m NOW I NEED: What is the speed of the ball...
*February 3, 2012 by Anonymous*

**Physics**

Derive a function that gives the final speed of the cart as a function of the masses, ramp angle and distance up the ramp that the cart moves. Use conservation of energy to do this-no kinematics or Newton's Laws. I have 3 trials ,, 3 angles and 3 masses ( cart moving up the ...
*July 22, 2011 by AfterLife*

**HEY DRWLS!! I have a question**

You're a genius, so can you please help me with my advanced algebra question. I posted it down below!! Thanks:) Miley
*January 29, 2008 by Miley*

**algebra**

Asked question wrong last time. New question with description of how to figure it out please. What is the value of 3t+7 given -2t+1 =3
*January 17, 2010 by Sammy*

**Algebra**

This question never got answered and I would appreciate it if someone could take a look at it. Simplify 12(6^/(5^-4^) + 7 My thoughts 12(36/(5^-4^) + 7 12(36/9) + 7 12 (4) + 7 12 * 11 132 Algebra - Steve, Saturday, August 23, 2014 at 11:49pm Your notation is weird. 5^-4 = 1/5^...
*August 24, 2014 by Faye*

**Physics**

I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket expels gases at a rate of 1.30 x 10^3 kg/s with...
*February 8, 2015 by Baxter Reus*

**Algebra I**

So- im trying to help my little brother out with his Algebra- but its been awhile since i have had algebra class- we need help with the following question: Solve the following equation for x: 2(x+4)=4x+12 2x+8=4x+12 2x=-4 x=-2 I think, lol I'll buy that. okay- i got that too- ...
*January 21, 2007 by Briana*

**Algebra II**

Simplify: x^5*x^pi Answer: x^8.14 Is this correct? I know that this is a repost of a question I posted yesterday, and I appreciate Damon looking at it, but I don't think I was clear in my typing of the question. Thanks.
*March 30, 2008 by Lucy*

**4th gr math**

Algebra question....Find the missing number. Tell which property can help you. _______ x 9=0. The answer is 0, I'm having trouble with the second question.
*November 29, 2011 by Miya*

**algebra**

graph the equation and find the y-intercept. 2y+5x=-6 My question is do I add -5x to both sides first?? how do I start this problem? No one has answered this question yet
*October 7, 2009 by Anonymous*

**Kinematics. Newtons Laws**

Two objects are in contact on a frictionless surface. A horizontal force is applied to one object as shown in the figure below. Use m1 = 1.2 g, m2 = 254 g and F = 0.7 N to find the force between the two objects.
*October 6, 2009 by Natasha*

**Physics**

A hot air balloon is ascending straight up at a constnat speed of 7.0 m/s. When th balloon is 12.0 m above the ground, a gun fires a pellet straight up from ground elvel with an initial speed of 30,0 m/s. Along the paths of the balloon and the pellet, there are two places ...
*January 2, 2009 by Anonymous*

**Physics 12 Kinematics**

I'm not really sure how to use the algebra to prove the monkey shouldn't have dropped. Obviously if the hunter aimed the gun directlt at the monkey it wouldn't hit it as gravity would pull it down. A huntsman fires a gun pointing at a monkey hanging on the branch of a tree. ...
*November 8, 2013 by Oscar*

**ALGEBRA**

I have a question. I am so lost in algebra and I need to know if 3x^2=5 is quadratic? (That's 3x squared equals 5)
*September 10, 2009 by ggift*

**Algebra Please Help**

If x is 10, is 2/x in proportion to x/50? Why I am not understanding the question very well. Algebra is not easy for me.
*April 18, 2011 by Amy L*

**Thank you Ann (kinematics)**

Thank you Ann! I had the equations and really was closing in on the answer... (stopping for 23 s is what really got me confused) in either case, the displacement for a) is 888 m ! Now I'll try to calculate (b). Thank you much! P.S. This is in response to my earlier physics (...
*January 31, 2007 by eric (new chem or physics prob. in)*

**Algebra**

Sorry Iposted that previous question wrong. Here is the right question. What is the remainder when the sum of the first 102 counting numbers is divided by 5250.
*April 4, 2011 by Mike*

**Physics**

Use principles of force and kinematics to answer these: a. A 40 kg skater pushes on the 60 kg skater (initially at rest). As they collide, the 40 kg skater pushes on the 60 kg skater, applying a force 100 Newtons for 1.2 seconds. Find the velocity at which each of them ends up...
*November 1, 2010 by jen*

**physics**

Use principles of force and kinematics to answer these: a. A 40 kg skater pushes on the 60 kg skater (initially at rest). As they collide, the 40 kg skater pushes on the 60 kg skater, applying a force 100 Newtons for 1.2 seconds. Find the velocity at which each of them ends up...
*November 1, 2010 by jen*

**Algebra. **

I'm in 8th grade, im in algebra, and this is my question: x=a+b+c ----- ab solve for a. please help!!
*October 25, 2010 by Maddison*

**kinematics**

A man stands on a slope of 20 degrees.His weight is 65kg. Given that the coefficient of static friction is 1.5, Calculate the maximum angle that the slope can have to the horizontal before he begins to slide. Also how does the pressure on his feet change with the changing ...
*March 8, 2012 by dmkp*

**physics**

The tortoise and the hare agree to a race. Of course, they are racing cars, having gotten tired of racing on foot. The tortoise, having just bought a new Mercedes AMG GT, allows the hare to have a running start in his Volkswagen Rabbit. The hare starts the race by getting up ...
*February 15, 2015 by Allie*

**Algebra Question**

How do I write A-1 The minus one is small and at the top but I am new at algebra and this is the first time I had to use this.
*December 21, 2009 by mike*

**calc-kinematics**

if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=-4cost-t^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sint-t a(t)=4cost-1 = 0 solved for t plugged it into v(t) and i got the wrong ...
*March 30, 2010 by James*

**two dimensional kinematics**

A jetliner with an airspeed of 1000 kmlhr sets out on a 1500 km flight due south. To maintain a southward direction, however, the plane must be pointed fifteen degrees west of south. Ifthe flight takes 1 00 min, what is the wind velocity?
*October 8, 2012 by ringo*

**help me physics**

suppose the cart has mass m = 203 g, and it strikes the clay at speed vo = 5.24 m/s and comes to a dead stop. Assume the track is frictionless, and the clay is crushed inward by 1.83 cm. a)Find the magnitude of the impulse exerted by the clay on the cart. 1 N-m i got this ...
*November 1, 2010 by jason*

**Algebra 1A**

describe what the graph of interval -4, 10 looks like? This is for math 166 algebra 1A I dont understand how to answer this question, please help me!
*November 29, 2008 by Julissa*

**algebra**

Since I am new to the algebra and do not fully understand it, I am not sure how to answer the following question. Hope you can help. thanks how do you know when an equation has infinitely many solutions
*August 9, 2010 by Ziggy*