Friday

April 18, 2014

April 18, 2014

Number of results: 110,113

**Physics - Range of projectile motion**

What properties of projectile motion must you apply when deriving an equation for the range of a projectile? (is it the trignometric identity??)
*Saturday, August 21, 2010 at 1:20pm by Shaila*

**Physics**

Which of the following statements about projectile motion is not correct? a)The acceleration is constant and in one direction. b)The only force is gravity. c)In projectile motion, the motion can be broken down into perpendicular components that are interdependent. d)All of ...
*Sunday, October 14, 2012 at 2:17pm by Lewis*

**physics**

True/False (#1 only) 1)The horizontal motion of a horizontally launched projectile affects its vertical motion. False 2)The path of a projectile through space is called its. Trajectory
*Tuesday, April 1, 2008 at 9:54pm by Jon*

**Science - Physics**

When a projectile is fired horizontally, which of the components of its motion is (A) motion at constatnt speed (B) uniformly accelerated motion (C) If the initial velocity of the projectile is increased, what effect will this have on the time it takes the projectile to fall ...
*Wednesday, December 6, 2006 at 7:53pm by Nicole*

**Physics**

The ball is horizontal projectile thrown with velocity v(x). It takes part in two motions simultaneously: along the horizontal and vertical axis. The horizontal motion of the projectile is uniform motion x=v(x)•t. This is because the only force acting on the projectile is ...
*Saturday, October 13, 2012 at 10:05am by Elena*

**Physics**

Q Exactly 2.7s after a projectile is fired into the air from the ground ,it is observed to have a velocity v = (8.8i+4.5 j) m/s where the x-axis is horizontal and the y axis is positive upward . a)Determine the horizontal range of the projectile b)Determine the maximum height ...
*Saturday, September 1, 2012 at 8:04am by Nikitha*

**physics/ 2D motion**

A projectile of mass 0.539 kg is shot from a cannon. The end of the cannon’s barrel is at height 6.4 m, as shown in the figure. The initial velocity of the projectile is 9 m/s . How long does it take the projectile to hit the ground? Answer in units of s
*Sunday, September 25, 2011 at 5:21pm by meagan*

**physics -- projectile motion **

why does a projectile of 45 degrees have the greatest range?
*Monday, March 7, 2011 at 8:47pm by ashley --- HELP PLEASEE!!!*

**Physics Projectile Motion**

What angle (from earth) should one shoot a projectile so that it reaches it's maximum?
*Thursday, November 8, 2012 at 9:58am by Leslie*

**physics**

i dont understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I dont get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she was wrong. I doubt if she...
*Wednesday, November 29, 2006 at 7:03pm by Katrina*

**physics**

Since the object is at the top of its trajectory its change in altitude (sin velocity) should be 0. Then you just need to calculate for the speed in the horizontal axis(which never changes in simple projectile motion). It becomes 141 cos(pi/4) or 141 cos (45) if you prefer ...
*Friday, September 30, 2011 at 8:57pm by hurrdurrbeedooda*

**Physics**

The projectile motion is fired with velocity of magnitude vo at the angle feta. Find feta for which the maximum elevation of the projectile is twice its range
*Thursday, September 22, 2011 at 3:29pm by Whitney*

**Physics**

The projectile motion is fired with velocity of magnitude vo at the angle feta. Find feta for which the maximum elevation of the projectile is twice its range
*Thursday, September 22, 2011 at 3:30pm by Whitney*

**Physics**

Answer for a is that the path will be linear, meaning that the person will see it as a 'vertical" motion.. However, for b, the answer is that the observer will see the object motion as a parabolic or projectile motion... Hope it helps.
*Sunday, October 18, 2009 at 4:54pm by Andre*

**physics**

A mass makes a projectile motion on a table (like the one in the projectile motion experiment) with inclination angle of the table as α=6o. The initial velocity and the initial angle are is 100 cm/s and 30 deg. respectively. What is the maximum height hmax ? (sin(6)=0.1, ...
*Friday, December 21, 2012 at 9:39am by anonymous*

**pre-calc**

analyzing the motion of a projectile: a projectile is fired from a cliff 200 feet above the water at an inclination of 45 degrees, with a muzzle velocity of 50 feet per second. the height of the projectile above the water is given by h(x)= -0.0128x^2+x+200 where x is the ...
*Thursday, November 10, 2011 at 7:01pm by steph*

**college physics**

When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...
*Wednesday, April 18, 2012 at 1:08am by CLARE*

**college physics**

When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...
*Wednesday, April 18, 2012 at 4:55am by CLARE*

**physics**

I have no idea what your figure looks like but in general this is a projectile problem You have a constant velocity normal to the E vector (which is constant between the plates) like horizontal speed in a projectile problem You have a F = q E problem in the direction of the E ...
*Saturday, February 8, 2014 at 11:42am by Damon*

**Projectile Motion Problem**

A projectile is shot straight up from the earth's surface at a speed of 1.20×10^4 km/h. How high does it go?
*Monday, April 5, 2010 at 2:37am by Mike*

**physics**

i need 1 question each of this following straight ine motion, free falling body, projectile in the dimension and projectile in two dimension... i need it badly.. our prof need a good example of I
*Sunday, March 13, 2011 at 7:18am by matt carlo*

**Physics Projectile Motion**

Thank u!!!!!
*Tuesday, September 23, 2008 at 8:18pm by Erinne*

**Physics- Projectile motion**

of course
*Monday, March 19, 2012 at 10:31pm by macky so*

**Physics - rojectile Motion (check pls)**

It is a communication worth question so i have to be wordy! btw - i got the answer of the projectile motion of the baseball! I was using sine of the angle multiplied by time instead of cosine in the horizontal component Thank you!
*Saturday, August 21, 2010 at 12:06pm by Shaila*

**Physics - rojectile Motion (check pls)**

Imagine that you are solving a problem in projectile motion in which you are asked to find the time at which a projectile reaches a certain vertical position. when you solve the problem you find out two different positive values for time that both satisfy the condition of the ...
*Saturday, August 21, 2010 at 12:06pm by Shaila*

**Phoenix**

Projectile motions problems are some of the most important problems you will encounter in this course. Through this discussion, we will solve a projectile motion problem step by step Assume a projectile is launched from ground height over a flat plane, at an angle of 50 ...
*Friday, May 10, 2013 at 7:00pm by Rick*

**Physics:Projectile Motion**

see above.
*Tuesday, September 23, 2008 at 8:04pm by bobpursley*

**Physics - Projectile Motion**

Ah, I see! Thank you!
*Wednesday, July 7, 2010 at 4:30pm by Stuck*

**physics**

how can projectile motion be applied in porkour?
*Wednesday, November 30, 2011 at 11:12am by sami*

**Physics Projectile Motion**

45 degrees
*Thursday, November 8, 2012 at 9:58am by Anonymous*

**physics**

Suppose we attempt to account for air resistance in our projectile motion in the following (incorrect) way: we alter g so that the acceleration in the y direction is -8 m/s2, and introduce a horizontal acceleration of -3 m/s2. With these changes, find the landing point of a ...
*Sunday, September 2, 2012 at 5:38pm by mitch*

**Applying Algebraic Thinking to Data**

Snoopy is in his plane, 4500 ft above ground. he fires a projectile straight up. The Vo of the projectile is 340 ft/s. (after the projectile is fired, it has no acceleration, so its height can be modeled by a "falling body" model). The Red baron is maintaining a constant ...
*Friday, April 20, 2012 at 7:49pm by Rachelle*

**Physics**

I failure to find an observation related to motion in two dimension projectile motion. Prove That/Show that maximum range =4Height or Rmax=4H please help me thanks Ahsan Khan
*Thursday, January 1, 2009 at 12:06pm by Muhammad Ahsan Khan*

**Physics - Projectile Motion**

You did it correctly, let me see your calculations.
*Thursday, August 19, 2010 at 10:24am by bobpursley*

**physics**

ehich of the following is an example of projectile motion?
*Wednesday, December 15, 2010 at 1:23am by cecilia *

**Physics**

Simple projectile motion. Draw a picture.
*Thursday, November 29, 2012 at 8:58pm by PhysicsPro*

**Physics**

A catapult throws a projectile at a 40.0° angle with a velocity of 26.0 m/s. How high will the projectile reach, and how far away will the projectile land?
*Saturday, December 18, 2010 at 6:49pm by George*

**Physics**

The highest barrier that a projectile can clear is 14.5 m, when the projectile is launched at an angle of 31.0 ° above the horizontal. What is the projectile's launch speed?
*Saturday, October 15, 2011 at 9:42pm by Heather*

**physics**

The highest barrier that a projectile can clear is 15.8 m, when the projectile is launched at an angle of 13.4° above the horizontal. What is the projectile's launch speed?
*Saturday, October 22, 2011 at 5:12pm by Nick*

**physics**

The highest barrier that a projectile can clear is 12.7 m, when the projectile is launched at an angle of 17.5° above the horizontal. What is the projectile's launch speed?
*Saturday, February 11, 2012 at 6:50pm by loweri*

**physics**

The highest barrier that a projectile can clear is 11.5 m, when the projectile is launched at an angle of 15.4° above the horizontal. What is the projectile's launch speed?
*Sunday, September 9, 2012 at 5:23pm by Sharienia*

**Physics ASAP**

http://www.physicstutorials.org/home/mechanics/1d-kinematics/projectile-motion?start=1
*Tuesday, May 28, 2013 at 5:49pm by Elena*

**physics**

A projectile MUST____. List all that apply. a) experience a net downward force b) have a constant speed c) be accelerating d) be changing its velocity e) be moving downward f) have a horizontal motion in addition to a vertical motion
*Tuesday, November 13, 2012 at 9:46am by michael*

**physics**

A projectile MUST____. List all that apply. a) experience a net downward force b) have a constant speed c) be accelerating d) be changing its velocity e) be moving downward f) have a horizontal motion in addition to a vertical motion
*Tuesday, November 13, 2012 at 9:47am by michael*

**physics**

i got an answer of y=-420.2599461m is this right??
*Monday, September 14, 2009 at 8:19pm by projectile motion*

**physics- projectile motion**

A) 32 degrees B)0.76 seconds
*Thursday, March 13, 2008 at 10:33pm by MEL*

**PHYSICS!!!!!!!!!!!!!!!!**

that doesnt look like projectile motion
*Wednesday, October 17, 2012 at 2:53am by NEED HELP ASAP!!!!!!!!!!!*

**physics**

The highest barrier that a projectile can clear is 13.4 m, when the projectile is launched at an angle of 11.0o above the horizontal. What is the projectile’s launch speed?
*Thursday, June 27, 2013 at 1:42pm by brain*

**general physics**

The highest barrier that a projectile can clear is 18.8 m, when the projectile is launched at an angle of 59.0 ° above the horizontal. What is the projectile's launch speed?
*Wednesday, July 3, 2013 at 7:04pm by vinny*

**physics**

Yes, it is a projectile motion problem, with conservation of momentum thrown in at the peak.
*Thursday, August 19, 2010 at 10:05am by bobpursley*

**Projectile Motion Physics**

It matters how fast the arrow was launched, and at what elevation.
*Wednesday, October 6, 2010 at 4:04pm by bobpursley*

**Physics - Projectile Motion**

This is going to be hard to explain, but I did an experiment on projectile motion and we had to lauch a marble from 0 degrees to 90 degrees in a 5 degree interval using a projectile launcher with the same velocity each time. We had to investigate the angle which gave the ...
*Monday, September 1, 2008 at 4:33am by TK*

**physics**

a,c,d are required by gravity. b is never true, unless the projectile is sitting on a table or riding in a box in a train car e is true only if dropped or shot downward f is not true if shot straight up, or down. Hmm Actually, it does have horizontal motion in those two cases...
*Tuesday, November 13, 2012 at 9:47am by bobpursley*

**trig**

Projectile Motion The ballistic analysis of a projectile may be simplified by combining the components of uniform and accelerated motion of the projectile. Consider a projectile fired from a gun with a muzzle velocity of V in a direction µº to the horizontal. We now ask ...
*Friday, September 9, 2011 at 11:31am by tchrwill*

**Physics - Projectile Motion**

Use energy: Initial KE+initialPE=finalKE 1/2 m 15^2 + m*g*5.3= 1/2 m vf^2
*Thursday, August 19, 2010 at 10:27am by bobpursley*

**science**

If a projectile is fired straight up at a speed of 13m/s. How long does it take to reach the top of its motion? If the acceleration due to gravity is 9.8m/ s motion (squared) answer in units of s
*Sunday, October 14, 2012 at 2:38pm by jessica*

**Physics **

A projectile is fired from ground level with a speed of 40 m/s at an angle of 30 degrees and hits a building 100m away. What is the time of flight of the projectile? How high above ground does the projectile hit the building? What is the speed of the projectile just before it ...
*Sunday, February 5, 2012 at 12:58pm by Krystal*

**Physics -.-**

A projectile is shot horizontally at 220 m/s from the top of a 620 m high cliff. A) How long till the projectile hits the ground? B) How far from the base of the cliff does the projectile land? I am gonna be honest. I have no idea how to do any of my Physics homework. ): I ...
*Monday, December 19, 2011 at 4:11pm by Allison*

**physics**

a projectile is fired from the top of a building with an initial velocity straight upward at 40m/sec. the top of the building is 50 meters above the ground? a) the maximun height of the projectile above the building b) the time for the projectile to reach the top c) the ...
*Saturday, October 15, 2011 at 1:37pm by daniel*

**PHYSICS**

A Projectile IS FIRED FROM THE TOP OF A BUILDING WITH AN INITIAL VELOCITY STRAIGH UPWARD AT 40.0 M/SEC . THE TOP OF THE BUILDING IS 50.0 METERS ABOVE THE GROUND. A) THE MAXIMUN HEIGHT OF THE PROJECTILE ABOVE THE BUILDING. B) THE TIME FOR THE PROJECTILE TO REACH THE TOP. C) THE...
*Sunday, October 16, 2011 at 5:11pm by HELPPMEEEEEEEEEE*

**physics**

A projectile was fired out of a lead ejector at an angle of 45 degrees up from horizontal. The projectile velocity was 1000.00 meters per second. How high did it go? and how far did the projectile go?
*Thursday, May 2, 2013 at 7:27pm by john*

**physics (please help!)**

A projectile of mass 0.539 kg is shot from a cannon. The end of the cannon’s barrel is at height 6.4 m, as shown in the figure. The initial velocity of the projectile is 9 m/s . How long does it take the projectile to hit the ground? Answer in units of s
*Wednesday, September 21, 2011 at 9:42pm by meagan*

**Physics**

A projectile is launched with an initial speed of 40m/s at an angle of 25 degrees above the horizontal. The projectile lands 3 sec. later. Neglect air friction. What is the projectile's velocity at the highest point of it's trajectory? What is the straight line distace from ...
*Thursday, February 24, 2011 at 7:22pm by Lady22*

**physics**

A projectile is fired straight up at a speed of 15 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 .
*Wednesday, October 12, 2011 at 4:00pm by Ellen*

**physics**

A projectile is fired straight up at a speed of 15 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 .
*Wednesday, October 12, 2011 at 4:02pm by Ellen*

**Scinece, Physics**

A boy is throwing a stone from the top of a building. It takes projectile motion and returns to the ground. How to calculate the height of buiding?
*Tuesday, September 25, 2012 at 5:11am by vinayan*

**physics**

an astronaut on the moon fires a projectile from a launcher on a level surface so as to get the maximum range. If the launcher gives the projectile a muzzle velocity of 25 m/s what is the range of the projectile?
*Tuesday, January 1, 2008 at 8:20pm by melissa*

**physics**

At time t=0 a projectile passes through the point (0,0,192) with a velocity v=10i-2j+16k. Because of spin and gravity, the projectile experiences an acceleration given by a=2i-32k. a. Find the velocity v(t) and position vector R(t) at time t>0. b. At what time t does the ...
*Wednesday, February 23, 2011 at 9:51pm by nicole*

**physics -- projectile motion **

the greatest sin value of theta is the sin of 45*
*Monday, March 7, 2011 at 8:47pm by John*

**Physics**

A projectile is launched horizontally with a speed of 80.0 m/s. If the projectile is launched 1.5m above the floor, how long does it take the projectile to hit the floor?
*Tuesday, June 8, 2010 at 9:21pm by Lilly*

**physics**

A 3Kg projectile is fired straight upward from earth's surface with a speed that is one-fourth the escape speed. Neglecting air resistance. a) What is the Kinetic energy of this projectile when it is launched? b) what is the gravitational potential energy of this projectile ...
*Monday, February 14, 2011 at 7:47pm by rick*

**physics**

a projectile with mass (m)=35grams is placed on a vertically positioned spring. the spring constant (k)=6500N/m. the projectile is launched straight up into the air by compressing the spring a distance (x)=8cm.How high does the projectile go?
*Monday, October 21, 2013 at 9:03pm by javier*

**physics**

a projectile with mass (m)=35grams is placed on a vertically positioned spring. the spring constant (k)=6500N/m. the projectile is launched straight up into the air by compressing the spring a distance (x)=8cm.How high does the projectile go?
*Monday, October 21, 2013 at 9:04pm by javier*

**physics**

Parabolic...a projectile makes parabolic motion.
*Monday, October 29, 2007 at 9:34pm by Serena*

**Physics**

A projectile is fired straight up at a speed of 13 m/s. How long does it take to reach the top of its motion? The acceleration due to gravity is 9.8 m/s2 .
*Tuesday, September 11, 2012 at 7:07pm by Alex*

**physics urgent please **

an example of projectile motion would be the motion of the baseball when it is hit by the bat,, it the trajectory (the path followed by the object) has the shape like a parabola. projectile motion is possible because of gravity. about the velocity, since it followed a path ...
*Thursday, March 31, 2011 at 11:02pm by Jai*

**Physics**

The projectile fired from the origin impacts 883.67m downrange after reaching a height of 127.55m. The second projectile will collide with the first projectile before it reaches its maximum height if the second projectile's launch angle was selected to result in equal maximum ...
*Thursday, September 22, 2011 at 9:39pm by tchrwill*

**Physics Projectile Motion**

The bullet fell .02m. heightfell=1/2 g t^2 find time speed=50m/time
*Tuesday, September 23, 2008 at 8:18pm by bobpursley*

**Physics**

A projectile is fired straight up at a speed of 16 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 . Answer in units of s.
*Monday, January 10, 2011 at 2:54pm by Michael*

**Physics**

A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air resistance.
*Tuesday, September 21, 2010 at 3:03pm by Jamie*

**physics**

A projectile is launched from ground level to the top of a cliff which is 195 m away and 135 m high.If the projectile lands on top of the cliff 6.5 s after it is fired, find the initial velocity of the projectile ( (a)magnitude and (b)direction ). Neglect air resistance.
*Tuesday, November 9, 2010 at 4:25pm by bobjahng2*

**physics**

A projectile is launched from ground level to the top of a cliff which is 195 m away and 135 m high.If the projectile lands on top of the cliff 6.5 s after it is fired, find the initial velocity of the projectile ( (a)magnitude and (b)direction ). Neglect air resistance.
*Thursday, November 11, 2010 at 12:56am by bobjahng2*

**physics**

A ship maneuvers to within 2500m of an island's 1800m high mountain peak and fires a projectile at an enemy ship 610m on the other side of the peak. If the ship shoots the projectile with an initial velocity of 250m/s at an angle of 75 degrees. how close to the enemy ship does...
*Friday, October 8, 2010 at 1:36am by Sydney*

**physics**

give an example of projectile motion;include in your explantion the term velocity , accleration and displacement orginality in your example will be appreciated?
*Thursday, March 31, 2011 at 11:20pm by chris*

**physics**

For a given velocity of projection in a projectile motion, the maximum horizontal distance is possible only at ө = 45°. Substantiate your answer with mathematical support. 20.5 m/s
*Tuesday, October 23, 2012 at 9:10pm by tre*

**Physics**

A projectile is fired straight up from a cliff which is 200 feet above ground with an initial velocity of 220 ft/sec. Assume that the only force affecting the projectile during flight is from gravity which produces a downward acceleration 32 ft/sec^2. Find an equation from the...
*Wednesday, December 8, 2010 at 7:20am by Marina*

**physics**

A projectile is fired from the origin (at y = 0 m) as shown in the diagram. The initial velocity components are V0x = 310 m/s and V0y = 26 m/s. The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q, which is 20 m below the launch ...
*Thursday, February 21, 2013 at 1:07am by Anonymous*

**projectile motion**

35m/s
*Sunday, November 14, 2010 at 11:49am by Timmm*

**science(physics)**

give an example of projectile motion;include in your explantion the term velocity , accleration and displacement orginality in your example will be appreciated?
*Thursday, March 31, 2011 at 10:37pm by chris*

**Physics**

A projectile is fired with an initial speed of 31.0 at an angle of 10.0 above the horizontal. The object hits the ground 7.50 later. a. How much higher or lower is the launch point relative to the point where the projectile hits the ground? b. To what maximum height above the ...
*Thursday, October 15, 2009 at 1:18am by Kelcie*

**physics**

A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air resistance. Calculate ...
*Wednesday, September 22, 2010 at 2:01pm by Sam*

**physics**

A projectile is fired at an angle of 30ᵒ above the horizontal from the top of the cliff 600 ft high. The initial speed of the projectile is 2000 ft/s. how far will the projectile move horizontally before it hits the level ground at the base of the cliff?
*Monday, January 13, 2014 at 1:06am by Anonymous*

**Dynamics**

A French artillerist, Captain A. Le Duc, developed an empirical formula for the velocity of a projectile in terms of the distance traveled by the projectile in the bore. For a 155-mm gun this equation is v = 3309s /(70 + s) where s is the distance traveled in the bore in ...
*Wednesday, January 19, 2011 at 3:12pm by stan*

**Physics**

A projectile is fired with an initial speed of 28.0 m/s at an angle of 65 degrees above the horizontal. The object hits the ground 9.5 seconds later. a) How much higher or lower is the launch point relative to the point where the projectile hits the ground? b) To what maximum ...
*Wednesday, October 19, 2011 at 1:10pm by Sara*

**physics urgent please **

Give an example of projectile motion;include in your explantion the term "velocity" , "accleration" and "displacement", orginality in your example will be appreciated?
*Thursday, March 31, 2011 at 11:02pm by chris*

**Physics**

A projectile is launched from ground level to the top of a cliff which is 195m away and 135m high (as shown in the figure ).If the projectile lands on top of the cliff 6.9s after it is fired, find the initial velocity of the projectile a)magnitude b)direction Neglect air ...
*Saturday, September 12, 2009 at 10:40pm by Jannie*

**Physics**

A projectile is launched from ground level to the top of a cliff which is 195 m away and 155 m high. If the projectile lands on top of the cliff 9.2 s after it is fired, find the initial velocity of the projectile (magnitude and direction). Neglect air resistance. Also ...
*Thursday, September 23, 2010 at 2:34pm by Sam*

**physics**

a projectile with a muzzle velocity of 550 m/s is fired from the a gun on top of a cliff 460 m above the sea level at a certain angle with respect to the horizontal. if the projectile hits the ocean surface. 49.2 seconds after being fired, determine the horizontal range of the...
*Saturday, May 4, 2013 at 6:23am by jennierson*

**Physics**

X-component of the package velocity on the instant when it begins the motion is vx= vcosα=76.8cos48^0=51.4m/s. The description of this projectile motion is x=vxt y=(gt^2)/2, the time of motion is t=sqroot(2y/g)=10.7 s, then the distance along the ground, measured from a ...
*Wednesday, February 8, 2012 at 6:27pm by Elena*

**Physics - Rube Goldberg Project**

You might begin here: http://search.yahoo.com/search?fr=mcafee&p=Rube+Goldberg+Machine+to+demonstrate+projectile+motion%2C+conservation+of+energy+%26+conservation+momentum Sra
*Tuesday, August 31, 2010 at 12:37pm by SraJMcGin*

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