Friday

April 18, 2014

April 18, 2014

Number of results: 27,928

**physics**

a stone is from the top of a tower 300m high and at the same time another stone is projected vertically upward with initial velocity 75m/s. calculate when and where the two stone meet
*Saturday, April 23, 2011 at 3:28am by irna*

**physics**

a low velocity mortar round is fired upward at an angle of 50° from the horizontal with a launch velocity of 40 m/s
*Monday, October 3, 2011 at 10:36pm by jared*

**Physics**

A projectile is shot from the ground at an angle of 60 degrees with respect to the horizontal, and it lands on the ground 5 seconds later. Find: a. the horizontal component of initial velocity b. the vertical component of initial velocity c. initial speed
*Tuesday, November 22, 2011 at 6:59am by nam maurer*

**Physics**

A projectile is shot from the ground at an angle of 60 degrees with respect to the horizontal, and it lands on the ground 5 seconds later. Find: a. the horizontal component of initial velocity b. the vertical component of initial velocity c. initial speed
*Wednesday, November 23, 2011 at 5:23am by nam maurer*

**Math**

Fireworks are fired at an angle of 82degrees with the horizontal. They are expected to explode about 100 m in the air, 4.8 secs after they are fired. What is the initial velocity of a shell fired from ground level. I think I have to find the vertical and horizontal components ...
*Monday, November 1, 2010 at 7:36pm by KC*

**physics **

a ufo is trying to escape by flying at the constant velocity of 70m/s at an upward angle of 2 degrees. it passes directly over you at a height of 40 m. at the instant it is directly above you you attempt to shoot it down by launching a projectile. what is the lowest launch ...
*Thursday, September 19, 2013 at 12:53am by mary*

**Physics**

Maria throws an apple vertically upward from a height of 1.3m unit an initial velocity of velocity of 12.4m/s 1. will the apple reach a friend in a tree house 5.3m above the ground. 2. If the apple is not caught, how long will the apple be in the air before it hits the ground.
*Wednesday, February 6, 2013 at 9:39pm by Jessica*

**Physics**

A ball is thrown vertically upward from a window with an initial velocity of 10m/s. if it hits the ground below the window 5.0s later, what is the height of the window...can you tell me the steps on how to do this please...
*Saturday, January 19, 2013 at 6:51pm by Luellen*

**math**

A soccer player kicks a ball and gives it an initial upward velocity of 47 feet per second. If everyone waits for the ball to bounce, how long will it be in the air? (Use the vertical motion formula, h= -16tsquared + vt + c, where h is the height of the ball will be at time t...
*Monday, April 29, 2013 at 10:46pm by kelly*

**math**

a ball is thrown vertically upward from the ground level with an initial velocity "Vo" - V sub zero a. derive a formula for the time at w/c the ball hit the ground b. use the formula to prove that the impact velocity by the ball is -Vo
*Monday, September 17, 2012 at 11:30am by justine*

**physics**

A projectile is fired horizontally from a gun that is 97.0 m above flat ground, emerging from the gun with a speed of 250 m/s. (a) How long does the projectile remain in the air? s (b) At what horizontal distance from the firing point does it strike the ground? m (c) What is ...
*Saturday, December 13, 2008 at 3:56pm by johnny*

**phisics**

A projectile is fired horizontally from a gun that is 45m above flat ground, emerging from the gun with speed 250m/s How long does the projectile remain in the air? At what horizontal distance from the firing point does it strike the ground?.What is the magnitude of the ...
*Monday, October 10, 2011 at 10:32pm by Shanice*

**science**

A projectile is fired with an initial speed of 120m.s' at an angle of 60' above the horizontal from the top of a 50m high cliff. (a) determine the maximum height(above the cliff) reached by the projectile (b) how long it takes to fall to the ground from the max. height?. ...
*Wednesday, February 9, 2011 at 10:01am by Mykmoloko*

**science**

A projectile is fired with an initial speed of 120m.s' at an angle of 60' above the horizontal from the top of a 50m high cliff. (a) determine the maximum height(above the cliff) reached by the projectile (b) how long it takes to fall to the ground from the max. height?. ...
*Wednesday, February 9, 2011 at 10:01am by Mykmoloko*

**Physics**

An object is thrown vertically and has an upward velocity of 5 m/s when it reaches three fourths of its maximum height above its launch point. What is the initial (launch) speed of the object?
*Friday, May 18, 2012 at 1:08pm by James*

**Physics**

An object is thrown vertically and has an upward velocity of 5 m/s when it reaches three fourths of its maximum height above its launch point. What is the initial (launch) speed of the object?
*Friday, May 18, 2012 at 1:08pm by James*

**Algebra 2**

If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) A package is thrown downward with an initial velocity of -...
*Sunday, April 29, 2012 at 1:07am by Kelsey*

**Phsyics**

A projectile is fired with an initial speed of 61.3m/s at an angle of 44.2∘ above the horizontal on a long flat firing range. (a) Determine the maximum height reached by the projectile. (b) Determine the total time in the air. (c) Determine the total horizontal distance ...
*Sunday, September 15, 2013 at 8:46pm by Tucker*

**projectile motion**

a bullet is fired horizontally with an initial velocity of 600 m/s at a target located 300 m from the rifle. how much time is required for the bullet to reach the target? (B) using the approximate value of g=10 m/s squared how far does the bullet fall in this time?
*Friday, September 21, 2012 at 5:45pm by us*

**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) The horizontal component of any velocity remains constant as it goes through the air, so the horizontal component of the initial velocity would still be 8.8i. The distance can be calculated using the formula Xf=Vx*t: Xf=8.8*2.7=23.76 b)Maximum height is given by the formula...
*Saturday, September 1, 2012 at 8:04am by Adam*

**physics**

A cannon sends a projectile towards a target 1390m away. The initial velocity makes an angel of 39 degrees with the horizontal. The target is hit. The acceleration of gravity is 9.8m/s^2. what is the magnitude of the initial velocity?
*Monday, September 19, 2011 at 7:58pm by Anonymous*

**science**

A rock is thrown vertically upward with an initial speed of 100 ft/s. At the same instant another rock is thrown vertically downward from the top of a 280 ft cliff with an initial speed of 40 ft/s. Neglecting air friction,
*Wednesday, January 9, 2013 at 6:45am by Anonymous*

**Physics**

An object is thrown vertically and has an upward velocity of 18 m/s when it reaches one fourth of its maximum height above its launch point. What is the initial (launch) speed of the object?
*Monday, September 15, 2008 at 11:39pm by Eve*

**Physics**

A. Consider the motion of a projectile. It is fired at t= 0. Its initial speed is 12 m/s and its initial projection angle is 50◦ from the horizontal. The acceleration of gravity is 9.8 m/s^2. What is the maximum height,h, of its trajectory? Answer in units of m. B. ...
*Wednesday, February 19, 2014 at 8:48pm by Fabricus*

**physics**

A projectile is fired at an upward angle of 45 degrees from the top of a 265 m cliff with a speed of 350 m/s. What will be it's speed when it strikes the ground below?
*Tuesday, October 26, 2010 at 10:29am by jessica*

**Physics**

An arrow was shot vertically upward at a velocity of 50.0 m/s. What was its velocity after 2.00 seconds?
*Saturday, January 5, 2013 at 3:59pm by Sam*

**science**

a particle is projected vertically upward with the velocity u m/s and after t(s) another particle is projected upwards from the same point and with the same initial velocity. proof that the particle will meet after a lapes of (u/g + t/2)seconds from the instance of the first ...
*Wednesday, February 13, 2013 at 3:52pm by Fatima*

**Physics**

A. You can use any coordinate system you like in order to solve a projectile motion problem. To demonstrate the truth of this statement, consider a ball thrown off the top of a building with a velocity at an angle θ with respect to the horizontal. Let the building be 50.0...
*Friday, September 9, 2011 at 11:26am by Awonah*

**Physics**

A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the other side of the peak, as illustrated in Figure 3-29. If the ship shoots the projectile with an initial velocity of v = 256 m/s at an angle of θ...
*Monday, February 27, 2012 at 9:38am by Shawn*

**physics**

A rifle allowed a bullet fired with an initial horizontal velocity to travel 76.0 m while only falling a distance of 0.40 m. What was the initial x-velocity of the bullet? Round your answer to 2 decimal places.
*Sunday, November 11, 2012 at 8:32pm by Sara*

**Physics**

Take into account the Earth's rotational speed (1 rev/day) and use 5 significant figures. (a) Determine the necessary speed, with respect to Earth, for a rocket to escape if fired from the Earth at the equator in a direction eastward. (The escape velocity from the surface of ...
*Wednesday, February 26, 2014 at 5:20pm by Anonymous*

**Physics**

The launching mechanism of a toy gun consists of a spring of unknown spring constant, as shown in Figure P5.33a. If its spring is compressed a distance of 0.140 m and the gun fired vertically as shown, the gun can launch a 24.0 g projectile to a maximum height of 26.0 m above ...
*Thursday, June 16, 2011 at 2:26pm by Sarah*

**Physics**

An object is thrown vetically upward with an initial velocity of 14.7 m/s.How long does it take for the object to be 9.8 m from its initial position?What is the instantaneous velocity at 9.8 m from its initial position. Explain why two answers arise.
*Monday, October 8, 2012 at 7:21pm by Anne*

**physics**

The launching mechanism of a toy gun consists of a spring of unknown spring constant, as shown in the figure below. If the spring is compressed a distance of 0.160 m and the gun fired vertically as shown, the gun can launch a 21.0-g projectile from rest to a maximum height of ...
*Thursday, March 21, 2013 at 12:43pm by Anonymous*

**physics**

A 5.88 g bullet is fired vertically into a 0.9 kg block of wood. The bullet gets stuck in the block, and the impact lifts the block 0.87 m up. (That is, the block — with the bullet stuck in it — rises 0.87 m up above its initial position, and then falls back down.) Given g = 9...
*Tuesday, August 9, 2011 at 10:26pm by James*

**Physics**

Someone posted the question below, stating that they knew the answer to part A but needed help with part B. Well even with the answer for A, I can't figure it out! Can you take a step back from the question below to show me the steps for solving part A? I've been working on ...
*Tuesday, October 14, 2008 at 11:43pm by Anna*

**college**

a ball is thrown vertically upward from the ground with the velocity of 30m/s, a)how long will it take to rise to its highest point? b)how high does the ball rise? c)how long after projection will the ball have the velocity of 10m/s upward? tnx
*Friday, July 16, 2010 at 6:28am by josh*

**physics**

A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 7.84 s. What is its initial velocity? Neglect air resistance.
*Tuesday, September 18, 2012 at 6:06pm by gary*

**Intermediate algebra**

If a ball is thrown vertically upward from the ground, with an initial velocity of 64 ft/s, it's height h after t seconds is given by h=-16t^2+64t how long does it take the ball to return to the ground?
*Tuesday, October 23, 2012 at 11:36pm by Help now!!*

**Physics**

A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 7.99 s. What is its initial velocity? Neglect air resistance.
*Saturday, August 31, 2013 at 9:08pm by RW*

**Physics**

A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 7.99 s. What is its initial velocity? Neglect air resistance.
*Saturday, August 31, 2013 at 10:41pm by WR*

**physics**

a projectile is fired at an angle of 60 degrees with the horizontal and with the initital velocity of 80 m/s. What is the time of flight?
*Thursday, April 12, 2012 at 1:39pm by Anonymous*

**Physics**

A tennis ball is thrown vertically upward with an initial velocity of +7.0 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s^2. Answer in units of m/s AND How long will the ball take to reach its starting point...
*Wednesday, September 21, 2011 at 9:50pm by Vanessa*

**physics**

A tennis ball is thrown vertically upward with an initial velocity of +7.5 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s How long will the ball take to reach its starting point? ...
*Sunday, January 29, 2012 at 7:08pm by shay*

**Math**

11. A rocket is fired upward from some initial height above the ground. Its height h in feet above the ground t seconds after it is fired is given by h = -16t2 + 48t +448. (i) What is its initial height? __________ ft. (ii) What is its maximum height? ___________ ft. (iii) How...
*Monday, October 3, 2011 at 11:16pm by Alyson*

**Physics**

A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the other side of the peak, as illustrated in Figure 3-29. If the ship shoots the projectile with an initial velocity of v = 248 m/s at an angle of θ...
*Friday, March 22, 2013 at 8:39pm by Nicola*

**Physics**

A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the other side of the peak, as illustrated in Figure 3-29. If the ship shoots the projectile with an initial velocity of v = 248 m/s at an angle of θ...
*Friday, March 22, 2013 at 8:41pm by Nicola*

**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**

A projectile is fired with an initial speed of 26.0 m/s at an angle of 30.0 above the horizontal. the object hits the ground 9.00 s later
*Wednesday, October 5, 2011 at 10:57pm by Anonymous*

**physics**

a .025kg bullet is fired upward through a .36kg block. the block goes .17meters and the bullet goes up 24 m in the air. what is the initial velocity of the bullet?
*Wednesday, October 9, 2013 at 4:53pm by Sara*

**Physics**

A projectile is fired at an upward angle of 25.0^\circ from the top of a 310 m cliff with a speed of 220 m/s. What will be its speed when it strikes the ground below? (Use conservation of energy.)
*Monday, November 15, 2010 at 11:57pm by Linda*

**phys**

a projectile is launched at 35 degrees above the horizontal with an initial velocity of 120m/s. What is the projectile's speed 3 seconds later? Figure the new vertical velocity at t=3. then the speed as equal to sqrt(Vv^2+ Vh^2) The other way to do this is figure how high it ...
*Monday, June 19, 2006 at 7:47pm by slien*

**physics**

Presumable the string, with the ball on it, is being moved vertically upward. Assume is is being accelerated by a constant force F while moving upward a distance H, and increasing its velocity to V. The work done by that force, T*H, must equal the increase in total energy, M g...
*Sunday, November 21, 2010 at 1:52am by drwls*

**west chester university **

A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 8.26 s. What is its initial velocity? Neglect air resistance.
*Saturday, February 9, 2013 at 7:13pm by kayla *

**physics **

Julie throws a rock vertically upward. From a height of 64.0 meters above thehow ground. The initial velocity of the rock is 31.0 meters per second neglect air resistance How long does it take for the rock to hit the ground? What is the velocity of the rock just before it hit ...
*Monday, April 1, 2013 at 4:06pm by kieshà*

**Physics**

From a rifle of mass 4kg,a bullet of mass 50 g is fired with an initial velocity of 35 m s-1 .Calculate the initial recoil velocity of the rifle.
*Sunday, March 25, 2012 at 5:37pm by hiyfifjk*

**PHYSICS**

A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -3.80 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -21.0 rad/s...
*Friday, November 14, 2008 at 5:53pm by Steven*

**College Physics**

A projectile is fired at an upward angle of 55.0 degrees from the top of a 230m cliff with a speed of 180m/s.What will be its speed when it strikes the ground below? (Use conservation of energy.)
*Thursday, February 25, 2010 at 11:03pm by Sandy*

**science**

The projectile is fired at an angle of 45 degree to the horizontal with an initial speed of 100 feet per second. Show work.
*Monday, March 14, 2011 at 12:01am by kasey kim*

**physics**

A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.95 m above. The brother's outstretched hand catches the keys 1.80 s later. (a) With what initial velocity were the keys thrown?
*Friday, September 16, 2011 at 4:57pm by Carolina*

**Physics **

A projectile is fired off a 35m cliff at 18m/s. what horizontal distance does the projectile travel before hitting the ground?
*Thursday, October 10, 2013 at 7:32pm by Miranda *

**mit physics**

A spherical non-rotating planet (with no atmosphere) has mass m 1= 6 ×10 24 kg and radius r 1= 9000 km. A projectile of mass m 2≪ m 1 is fired from the surface of the planet at a point A with a speed v A at an angle α=30 ∘ with respect to the radial direction...
*Friday, December 6, 2013 at 10:27am by juanpro*

**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**

The rocket acquires all of the original momentum of the spaceship stops. (M + m)V1 = m V2 2.5*10^6* 210 = 1350*V2 V2 = 3.89*10^5 m/s This is an unrealistically high velocity for a rocket, or even a bullet-fired projectile. Furthermore, the spaceship fired a real rocket, most ...
*Monday, February 25, 2008 at 8:32am by drwls*

**Physics**

A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun straight down towards the water. If air resistance is negligible, the acceleration of the bullets just before they strike the water A. is greater for the dropped ...
*Sunday, September 10, 2006 at 2:09pm by JC*

**math**

If a projectile is launched from a platform 30 feet high with an initial velocity of 128 feet per second, then the height of the projectile at t seconds is given by s(t) = –16t2 + 128t + 30 feet. (a) At what time does the projectile attain its maximum height? Show some work. (...
*Tuesday, November 9, 2010 at 5:33am by Math is HARD*

**Physics**

A tennis ball is thrown vertically upward with an initial velocity of +8.0 m/s. a. what will the ball's speed be when it returns to its starting point? b. how long will the ball take to reach its starting point?
*Wednesday, September 24, 2008 at 2:29am by Eli*

**Physics**

A tennis ball is thrown vertically upward with an initial velocity of 8.0 m/s. a) what will the ball's speed be when it returns to its starting point. b) how long will the ball take to reach it's starting point?
*Saturday, September 15, 2012 at 7:15pm by Anonymous*

**Physics**

A projectile is shot from the edge of a cliff h = 225 m above ground level with an initial speed of v0 = 155 m/s at an angle of 37.0° with the horizontal a. Determine the time taken by the projectile to hit point P at ground level. b. Determine the range X of the projectile as...
*Saturday, September 17, 2011 at 8:58pm by Bridge*

**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 problem-gun (projectile problem)**

A gun shoots bullets that leave the muzzle at 250 m/s. If a bullet is tohit a target 160.8 m away at the level of the muzzle, the gun must be aimedat a point above the target. (Neglect air resistance.) How far above the target is this point if the angle the gun makes is ...
*Friday, July 15, 2005 at 2:31am by Marcus Jasp*

**physics**

A landing craft of mass 12000 kg prepare itself for moon landing. when at a vertical distance 160m above the moons surface its downward velocity is 15 m/s. a retrorocket is fired to give the craft an upward thrust to slow its speed to zero as it meet the surface.calculate the ...
*Tuesday, September 4, 2012 at 8:08am by Emily*

**MATH**

A projectile is launched vertically upward from the top of a 240-foot building. This translate to the model y = -16t^2 + 32t + 240 where y is the height in feet and t is the time in seconds after it was launched. When will he projectile hit the ground? would i divide both ...
*Saturday, September 27, 2008 at 12:40pm by jennifer*

**math**

A projectile is launched vertically upward from the top of a 240-foot building. This translate to the model y = -16t^2 + 32t + 240 where y is the height in feet and t is the time in seconds after it was launched. When will he projectile hit the ground? would i divide both ...
*Saturday, September 27, 2008 at 3:59pm by Anonymous*

**physics**

a juggler throws a ball with an initial horizontal velocity of +1.1 m/s and an initial vertical velocity of +5.7 m/s. What is its acceleration at the top of its flight path? make sure to consider the sign when responding. consider the upward direction as positive.
*Friday, June 24, 2011 at 5:43pm by aimee*

**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**

a body thrown vertically upward returns to the earth in 3sec what was the initial velocity of the body? what height did the body reach? neglect the resistance of air. The answer after solving is 14.7m/s and 11m. please tell me how the answer is arrived.
*Sunday, July 10, 2011 at 11:23am by pavatharani*

**physics**

two students are on a balcony 20.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way down. (Assume the ...
*Wednesday, March 2, 2011 at 11:20pm by fsfsf*

**physics**

two students are on a balcony 20.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way down. (Assume the ...
*Wednesday, March 2, 2011 at 11:21pm by fsfsf*

**physics problem!**

The spring constant of a toy dart gun is 4442 N/m. To!@#$%^& the gun the spring is compressed 1.5 cm. The 8 g dart, fired straight upward, reaches a maximum height of 26 m. The acceleration of gravity is 9.81 Determine the magnitude of the energy dissipated by air friction ...
*Thursday, March 1, 2007 at 6:17pm by kitt*

**Sindhi**

the velocity of a projectile at its highest point is 40 m/s.if the projectile was in air for 6 second before falling the ground calculate angle of projection of the projectile.
*Sunday, September 23, 2012 at 5:34am by Asif Khan*

**Physics **

A stone is thrown vertically upward from outside a window, with an initial velocity of 24.0 m/s. It moves up, and then down to the ground 420 m below the point where it started. Let `up' be positive. (a) What is the maximum height above the window to which the stone rises? ...
*Wednesday, September 19, 2012 at 2:44pm by arcos15*

**Physics **

A stone is thrown vertically upward from outside a window, with an initial velocity of 24.0 m/s. It moves up, and then down to the ground 420 m below the point where it started. Let `up' be positive. (a) What is the maximum height above the window to which the stone rises? ...
*Wednesday, September 19, 2012 at 10:07pm by arcos15*

**physics**

a projectile is fired from the surface of the earth with a speed of 200 m/s at an angle of 30 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile
*Sunday, September 25, 2011 at 6:03pm by Anonymous*

**physics**

A bullet of mass 0.45kg is fired from a gun of mass 9kg,the bullet moving with an initial velocity of 200meter per sec. Find the initial backward velocity of the gun.
*Friday, December 30, 2011 at 1:58am by Flexy*

**physics**

A bullet of mass 0.45kg is fired from a gun of mass 9kg,the bullet moving with an initial velocity of 200meter per sec. Find the initial backward velocity of the gun.
*Friday, December 30, 2011 at 1:58am by Flexy*

**trigonometry**

4.if cotθ = -√15/7 , use the fundamental identities to find cosθ > 0 9.A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? (Round to the nearest tenth of a...
*Thursday, December 13, 2012 at 10:30am by Emily*

**physics**

A 0.500 kg is thrown vertically upward from the ground with an initial speed of 12.0 m/s. Define the initial potential energy to be zero on the ground. What are the potential energy and kinetic energy of the ball at 2.50m above the initial position?
*Thursday, November 8, 2012 at 2:56pm by Jeff*

**physics**

Consider a projectile fired horizontally from a cliff of a given height. With what speed must it be fired so that it makes a 45 degree angle with the ground when it hits
*Friday, September 24, 2010 at 3:43am by Ligu*

**physics**

if a ball, fired as a projectile, travels 30 meters when it leaves the the ground at 20% angel, it will travel the same distance when fired at an angle of what degrees
*Friday, November 19, 2010 at 7:02pm by luke*

**physics**

if a ball, fired as a projectile, travels 30 meters when it leaves the the ground at 20% angel, it will travel the same distance when fired at an angle of what degrees
*Friday, November 19, 2010 at 7:02pm by luke*

**Physics**

You can use any coordinate system you like in order to solve a projectile motion problem. To demonstrate the truth of this statement, consider a ball thrown off the top of a building with a velocity v at an angle è with respect to the horizontal. Let the building be 50.0 m ...
*Sunday, August 30, 2009 at 12:18pm by Annmay*

**Physics**

u is the initial velocity = muzzle velocity. The formula is to find S, the distance the bullet drops vertically.
*Thursday, June 4, 2009 at 9:06pm by MathMate*

**Physics**

Assuming there is no atmosphere and the projectile is not aimed below the horizon (i.e. at the ground), the escape velocity IS independent of launch angle. Consider the situation from an energy point of view. If there is enough in initial kinetic energy so that Ve^2/2 = MG/R, ...
*Sunday, August 8, 2010 at 7:26am by drwls*

**mechanics**

Q3. A skeet (a small disc) of massM is fired at an angle to the horizontal with a speed v0. When it reaches the maximum height it is hit from below by a pellet of mass m (m < M) traveling vertically upward at a speed of v. The pellet is embedded in the skeet. (a) What is ...
*Thursday, December 9, 2010 at 3:44am by sana*

**physics**

A student throws a ball vertically upward such that it travels 7.5 to its maximum height.If the ball is caught at the initial height 2.3 after being thrown, what is the ball’s average speed? What is the ball’s average velocity?
*Thursday, February 17, 2011 at 1:22pm by Anonymous*

**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*

**physics**

A 1.75-kg wooden block rests on a table over a large hole as in the figure below. A 4.60-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum height of 24.0 cm.
*Sunday, March 25, 2012 at 6:02pm by jeezy*

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