Tuesday

August 30, 2016
Number of results: 81,054

**Physics**

You are an artillery offcer attached to Gaius Julius Caesar's Xth Legion in the Gallic War (1st C. BCE). You are responsible for a catapult, a device with a long spoonlike arm used to lob stones or pumpkins over the walls of Gallic oppida. These fortresses are protected by ...
*February 10, 2011 by Roberto*

**Physics**

You are an artillery offcer attached to Gaius Julius Caesar's Xth Legion in the Gallic War (1st C. BCE). You are responsible for a catapult, a device with a long spoonlike arm used to lob stones or pumpkins over the walls of Gallic oppida. These fortresses are protected by ...
*February 11, 2011 by Roberto*

**Physics**

You are an artillery offcer attached to Gaius Julius Caesar's Xth Legion in the Gallic War (1st C. BCE). You are responsible for a catapult, a device with a long spoonlike arm used to lob stones or pumpkins over the walls of Gallic oppida. These fortresses are protected by ...
*February 11, 2011 by Roberto*

**Physics**

You are an artillery offcer attached to Gaius Julius Caesar's Xth Legion in the Gallic War (1st C. BCE). You are responsible for a catapult, a device with a long spoonlike arm used to lob stones or pumpkins over the walls of Gallic oppida. These fortresses are protected by ...
*February 12, 2011 by Roberto*

**calc 2**

The height (in feet) attained by a rocket t seconds into flight is giving by the function h(t)= -1/3t^3 + 16t^2 + 33t + 10 When is the rocket rising? When is the rocket decreasing? when does it reach its maximum height above the ground? what is the maximum height? what is the ...
*November 30, 2011 by chris*

**calculus**

The height (in feet) attained by a rocket t seconds into flight is giving by the function h(t)= -1/3t^3 + 16t^2 + 33t + 10 When is the rocket rising? When is the rocket decreasing? when does it reach its maximum height above the ground? what is the maximum height? what is the ...
*November 30, 2011 by chris*

**pysics**

an artillery piece is pionted upward at an angle of 35degree with respect to the horizontal and fire a projectile with a muzzle velocity 200meter per second .if air resistance is negligible to what height will the projectile rise.
*December 3, 2015 by asma*

**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?
*January 13, 2014 by Anonymous*

**Physics**

A body of mass 10g oscillates with Simple Harmonic Motion of amplitude 4cm and time period 0.50s. Calculate: a) The maximum acceleration. b) The maximum kinetic energy.
*March 13, 2016 by Alex*

**college algebra**

The height of a projectile fired upward is given by the formula s = v0t – 16t2, where s is the height, v0 is the initial velocity and t is the time. Find the times at which a projectile with an initial velocity of 128 ft/s will be 144 ft above the ground. Round to the nearest ...
*April 8, 2014 by Kelly*

**Physics help **

A 31.0 kg child on a swing reaches a maximum height of 1.92 m above their rest position. Assuming no loss of energy: a) At what point during the swing will she attain their maximum speed? b) What will be her maximum speed through the subsequent swing? c) Assuming this maximum ...
*January 11, 2016 by Help me in Physics*

**physics**

For this problem use the Uniform circular motion mode of the simulation. (a) Given the limits on the sliders in the simulation, what is the maximum possible speed that can be achieved in "Uniform circular motion" mode? .25 m/s For the remaining parts of this question use the ...
*December 20, 2009 by jesse*

**Physics**

A rocket is launched at an angle of 56.0° above the horizontal with an initial speed of 96 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile. (a) ...
*September 12, 2011 by Elaine Jetton*

**physics**

You throw a baseball directly upward at time t = 0 at an initial speed of 12.5 m/s. What is the maximum height the ball reaches above where it leaves your hand? At what times does the ball pass through half the maximum height? Ignore air resistance and take g = 9.80 m/s2.
*September 8, 2013 by chris*

**physics**

You throw a baseball directly upward at time t = 0 at an initial speed of 13.3 m/s. What is the maximum height the ball reaches above where it leaves your hand? At what times does the ball pass through half the maximum height? Ignore air resistance and take g = 9.80 m/s2.
*September 7, 2015 by Jordan*

**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 ...
*February 14, 2011 by rick*

**physics**

if ball is thrown upward with a initial velocity of 38.5 m/s and the maximum height of the ball is 74.1m. How long will it take the ball to reach it's maximum height
*September 25, 2012 by lana*

**Physics**

A projectile is accelerated from rest at point A along a circular track of radius 2 m, as shown in Fig. 5.1. Gravity acts in the z direction. The rate at which the speed of the projectile increases as a function of time, t, is at = 2t ms-2. What is the magnitude of the ...
*October 16, 2014 by Lucy*

**Math**

A projectile is launched upward from the ground at an initial velocity of 400 feet per second. During it’s upward flight, the projectile passes a hot air balloon floating at a constant height of 2400 feet. How many seconds later will the projectile pass the hot air balloon ...
*December 31, 2015 by Sunny*

**physics help!**

Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 155 N/m. The motion of the object on spring 1 has twice the amplitude as the motion of the object on spring 2. The magnitude of the...
*November 19, 2011 by meagan*

**simple harmonic motion**

A 50-g mass is attached to a spring and undergoes simple harmonic motion. Its maximum acceleration is 15m/s2 and its maximum speed is 3.5m/s .
*December 4, 2014 by little wayne*

**Physics**

Mr. Martin springs off a 5 meter high diving board with an upward velocity of 20 m/s. A. Find Mr. Martin's height, velocity and acceleration after 0.5 seconds. B. Determine when Mr. Martin will hit the water. C. What is Mr. Martin's maximum height off the board? D. What is Mr...
*December 20, 2015 by Thea*

**Physics**

Two projectiles are launched from ground level at the same angle above the horizontal, and both return to ground level. Projectile A has a launch speed that is twice that of projectile B. (Sketch trajectories of projectiles). Assuming that air resistance is absent, what should...
*May 24, 2010 by Christy*

**physics**

A tennis ball is thrown vertically upwards from the ground with a velocity of 50m/s calculate.1.the maximum height reached. 2.the time to reached the maximum height. 3.the time of flight
*April 29, 2015 by Marino*

**MATH**

The height h (in meters) of a cannonball t seconds after it is fired into the air is given by h=-4t^2+16t+9. a) What is the initial height of the cannonball? What feature does this correspond to on the graph? b) Find the height of the cannonball after 1 second. c) What is the ...
*March 8, 2014 by Josh*

**physics help me bob!**

A rock is thrown from the roof of a building with a velocity v0 at an angle α0. The height of the building is h. (i)Calculate the horizontal distance traveled by the projectile before it strikes the ground. (ii)Show that the speed of the rock just before it strikes the ...
*December 2, 2012 by dt*

**physics**

A rocket (stating from rest) travels upwards for 3 minutes at a constant acceleration of 16 m/s^2, and then coasts upwards until it reaches its maximum height. What it the rocket's maximum height?
*November 19, 2008 by Sam*

**physics**

An object is thrown up at an angle of 40.0 degree above the horizontal and reaches a maximum height H. If the angle is now doubled to 80.0^degree, but nothing else is changed, its maximum height will be a. 1.67 H. b. 2.00 H. c. 2.35 H. d. 4.00 H.
*January 25, 2011 by andrea*

**algebra**

Ryan throws a tennis ball straight up into the air. The ball reaches its maximum height at 2 seconds. The approximate height of the ball x seconds after being thrown is shown in the table. Which equation models the motion of the ball?
*June 24, 2016 by Anonymous*

**physics**

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

**Physics**

A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.2 m/s at ground level. Its engines then fire and it accelerates upward at 4.20 m/s2 until it reaches an altitude of 960 m. At that point its engines fail, and the rocket goes into ...
*October 11, 2009 by Becky*

**intermediate algebra**

A projectile is launched directly upward from the top of a 112 - foot building with an initial velocity (speed) of 96 feet per second. This translates to the h(t) = -16t^2 + 96t + 112 where h(t) is the height of the projectile in feet and t is the time in seconds after it is ...
*November 6, 2008 by jennifer*

**physics**

A projectile is launched from and returns to ground level, as the figure shows. There is no air resistance. The horizontal range of the projectile is measured to be R= 166 m, and the horizontal component of the launch velocity is v0x = 26.0 m/s. Find the vertical component v0y...
*December 16, 2015 by chris*

**physics problem!**

The spring constant of a toy dart gun is 4442 N/m. To cock 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 ...
*March 1, 2007 by kitt*

**PHYSICS **

without air resistance maximum range of projectile is obtained with an angle of ???? Can you please fill in the blank THANK YOU
*February 1, 2015 by greoge*

**PHYSICS**

An object is attached to an ideal spring. It undergoes a simple harmonic motion with a total energy of E = 2.2 J. The amplitude of the motion is 0.7 m and the maximum speed of the object is 0.5 m/s. Find the spring constant.
*April 7, 2011 by Unknown*

**calculus **

Can some explain how to do this problem? I tried using derivatives...but...I keep getting a different answer from what my teacher told me! A projectile is fired directly upward with an initial velocity of 144 ft/sec and its height (in feet) above the ground after t seconds is ...
*July 7, 2012 by help*

**Physics**

A ball is thrown upwards on the moon with an initial speed of 35m/s. Calculate (a)the time taken to reach the maximum height. (b) the maximum height reached by the ball (c) Its velocity 3seconds after it has been thrown. (g=1.6ms^2)
*November 16, 2010 by Jess*

**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?
*June 8, 2010 by Lilly*

**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?
*March 31, 2011 by chris*

**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.
*September 21, 2010 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.
*November 9, 2010 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.
*November 11, 2010 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...
*October 8, 2010 by Sydney*

**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 ...
*January 19, 2011 by stan*

**precalc**

A projectile is launched from a platform 10 feet high with an initial velocity of 72 feet per second, The height h of the projectile at t seconds after launch is given by h = –16t2 + 72t + 10 feet.
*July 7, 2016 by Tony*

**physics math**

MULTIPLE -CHOICE QUESTION A baseball is launched from the bat at an angle θo = 30° what respect to the positive x-axis and with an initial speed of 40 m/s ,and it is caught at the same height from which it is was hit. Assuming ideal projectile motion (positive y-axis ...
*August 16, 2016 by himel*

**Physics ( Calculus & Mecahnics ) **

A proton with mass m moves in one dimension.The potential-energy function is where and are positive constants. The proton is released from rest a x0 = a/b. (a) Show that can be written as U(x) = a --- [ ( x0/x )^2 - x0/x ] x0^2 Graph U(x). Calculate U(x0) and thereby locate ...
*January 23, 2011 by Clark*

**calculus - integration**

A baseball is thrown upward from a height of 2m with an initial velocity of 10m/s. Determine its maximum height. S(0) = 2m S'(0) = 10m/s S'(t) = -32t + 10 S(t) = -16t^2 + 10t + 2 I know that if you equal s(t) = 0 you get time, but how do I get maximum height? Thanx in advanced!
*February 1, 2011 by Gabriel*

**That darn PHYSICS again**

Hi! i need some help with this ASAP! a body is projected upwards from a point on level ground with a velocity of 45 m/s at an elevation of 30 degrees. Working from the expression for uniformly accelerated motion in a straight line, determine 1) the time of flight 2) the ...
*October 3, 2006 by Sean*

**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?
*March 31, 2011 by chris*

**Pre-Calc**

The height s of a ball, in feet, thrown with an initial velocity of 112 feet per second from an initial height of 20 feet is given as a function of time t (in seconds) by s(t)= -16t^2+112t+20. What is the maximum height of the ball? At what time does the maximum height occur? ...
*September 24, 2009 by MUFFY Question has been fixed*

**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 ...
*September 12, 2009 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. Calculate ...
*September 22, 2010 by Sam*

**Physics**

A block of mass m = 5.2 kg is released from rest at a height of H = 4.0 m on a curved frictionless ramp. At the foot of the ramp is a spring whose spring constant is k = 192.0 N/m. What is the maximum compression of the spring, x? After the spring reaches its maximum ...
*December 25, 2013 by John*

**physics**

A block of mass m = 2.7 kg is released from rest at a height of H = 0.49 m on a curved frictionless ramp. At the foot of the ramp is a spring whose spring constant is k = 515.0 N/m. What is the maximum compression of the spring, x? B)After the spring reaches its maximum ...
*March 5, 2014 by Chris*

**Science Help**

A projectile that is launched at 15 degrees and the landing height is the same as the launch position. If this is true, then at what other angle can the projectile be launch to achieve the same horizontal displacement?
*March 13, 2015 by Khloe*

**Science Help**

A projectile is launched at 15 degrees and it's landing height is the same as the launch position. If this is true, then at what other angle can the projectile be launch to achieve the same horizontal displacement?
*March 15, 2015 by Steffi*

**physics**

A ball is thrown straight downward from the surface of the moon. Is the maximum height it reaches less than, equal to, or greater than the maximum height reached by a ball thrown upwards on the earth with the same initial speed? Ignore air resistance in both cases
*September 23, 2012 by tiffany*

**math**

The height in meters of a projectile launched from the top of a building is given by h(t)=-5t^2+60t+15, where t is time in seconds since it was launched. a) How tall is the building? b) At what time does the projectile hit the ground? C)What is the velocity(rate of change with...
*December 3, 2015 by mike*

**Math**

A projectile is shot vertically into the air. Its height, h, in metres, after t seconds is approximately modelled by the relation h=-5t^2+120t+125: c) For how many seconds is the projectile in the air? (1 mark)
*October 29, 2014 by Alex*

**physics**

I did a projectile motion lab, predicting where a ball would land before actually dropping it. I have to answer this question: you accounted for variations in the velocity measurement in your range prediction. Are there other measurements you used which would affect the range ...
*February 1, 2009 by Kimberly*

**Algebra: Quadratic Functions**

A model rocket is launched with an initial velocity of 128 ft/s from a height of 70 ft. The height of the rocket, in feet, t seconds after it has been launched is given by the function s(t)=−16t^2+128t+70. Determine the time which the rocket reaches its maximum height ...
*March 18, 2014 by Isiah*

**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 ...
*September 23, 2010 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...
*May 4, 2013 by jennierson*

**Algebra**

The height of a rocket fired vertically into the air from the ground is given by the formula h(t) = -16t (2nd power) + 384t + 4, where t is measured in seconds. How long will it take to reach its maximum height and what is the maximum height reached by the rocket
*November 9, 2009 by Pat*

**physics**

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?
*October 10, 2012 by Becca*

**physics**

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?
*October 11, 2012 by Grace*

**Physics**

A rocket is launched at an angle of 42◦ above the horizontal with an initial speed of 76 m/s. It moves for 9 s along its initial line of motion with an acceleration of 29 m/s^2. At this time its engines fail and the rocket proceeds to move as a projectile. The ...
*September 6, 2010 by John*

**Physics**

The maximum speed of a 3.1-{\rm kg} mass attached to a spring is 0.70 m/s, and the maximum force exerted on the mass is 12 N. What is the amplitude of motion for this mass? Express your answer using two significant figures.
*November 20, 2011 by Byron*

**Math( help please ! )**

The height of a ball thrown vertically upward from a rooftop is modelled by h(t)=-5t^2=20t=50, where h(t) is the ball's height above the gorund,in meters, at time t seconds after the throw a) determine the maximum height of the ball b) how long does it take for the ball to ...
*October 17, 2011 by Erin*

**memorial university**

The highest barrier that a projectile can clear is 13.8 m, when the projectile is launched at an angle of 14.9° above the horizontal. What is the projectile's launch speed?
*October 19, 2011 by obinna*

**physics**

a projectile is shot up 25 m/s at an angle of 34 degress how high imto the air does the projectile go?
*March 28, 2011 by kane*

**Math 20.1**

A baseball is hit into the air and its height (h), in feet, above the ground after a time (t), in seconds, is modelled by the quadratic equation: h(t) = –16t 2 + 96t + 3. a) What is the maximum height of the ball? b) How much time does it take to reach the maximum height?
*February 2, 2014 by MoMoney*

**physics**

A 0.190 kg projectile is fired with a velocity of +705 m/s at a 2.00 kg wooden block that rests on a frictionless table. The velocity of the block, immediately after the projectile passes through it, is +40.0 m/s. Find the velocity with which the projectile exits from the block.
*January 17, 2012 by emma*

**physics**

a ball is thrown at an initial angle of 37 and initail velocity of 23.0 m/s reaches a maximum height h, as shwon in the Figure. With what initial speed must a ball be thrown straight up to reach the same maximum height h?
*January 3, 2011 by Anonymous*

**Physics AP**

A ball is thrown straight upward with a speed of +12 m/s. A) what's the ball's acceleration just after it is thrown? B) how much time does it take for the ball to rise to its maximum height? C) what's the approximate maximum height the ball reaches?
*September 15, 2012 by Anna*

**Physics**

Tarzan, whose mass is 76 kg, travelling at 9.5m/s, grabs from the bottom of a 1.5 m long vine and swings upward. a) Calculate the maximum height of Tarzan. b) Calculate the angle at which the vine makes with the vertical at his maximum height.
*April 25, 2016 by Someone*

**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...
*February 27, 2012 by Shawn*

**projectile physics**

im a bit puzzled, please help me gain the sanity required for this confusion... suppose a ball is thrown from the top of a cliff, and i am supposed to get its final velocity; since when the ball reaches it maximum height, the vf which becomes the vi or initial velocity upon ...
*May 5, 2011 by cheerie*

**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.
*September 23, 2012 by Asif Khan*

**physics**

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 9.7-kg projectile from rest to a speed of 6.5 × 103 m/s. The net force accelerating the projectile is 8.0 × 105 N. How much ...
*June 24, 2013 by BRAD*

**physics**

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 7.0 kg projectile from rest to a speed of 4.0 x 103 m/s. The net force accelerating the projectile is 4.9 x 105 N. How much ...
*September 20, 2013 by paul*

**PHYSICS**

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 8.9-kg projectile from rest to a speed of 4.2 × 103 m/s. The net force accelerating the projectile is 1.4 × 105 N. How much ...
*March 16, 2014 by Tom*

**Physics**

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 1.9-kg projectile from rest to a speed of 5.1 × 103 m/s. The net force accelerating the projectile is 8.6 × 105 N. How much ...
*September 25, 2014 by Sam*

**Physics**

You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 8.0 m/s. (a) How much time does it take for the tennis ball to reach its maximum height? (b) What is the maximum height above ...
*September 6, 2014 by John*

**Math**

Every year in Delaware there is a contest where people create cannons and catapults designed to launch pumpkins as far in the air as possible. the equation y=15+110x-16x^2 can be used to represent the height, y, of a launched pumpkin, where x is the time in seconds that the ...
*January 21, 2015 by Veronica*

**Maths and Physics**

An inverted garbage can of Weight W is suspended in air by water from a geyser. The water shoots up from the ground with a speed u, at a constant rate dm/dt. Find the maximum height at which the garbage can rides.What assumption must be fulfilled for the maximum height to be ...
*January 25, 2015 by Anonymous*

**math**

A projectile is launched vertically upward from the top of a 240-foot building. This translates 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 the projectile hit the ground?
*September 25, 2008 by jennifer*

**Physics**

A cannon ball is projected so as to attain maximum range. Find the maximum height attained if the initial velocity is u
*April 14, 2015 by Olushola*

**physics**

A ball is thrown vertically upword with an initial velocity of 40m/s (1) calculate 1 it velocity after 3secs (2) the maximum height attend and the time taken to reach the maximum height (3) the total taken for the ball to return to the grand again
*February 2, 2016 by TLIMAN*

**Physics**

A paladin howitzer fires a 46.00 kg projectile towards a 1000 kg metal block resting on a frictionless surface. Just before impact, the projectile is traveling with a horizontal velocity of 529 m/s. After the collision, the embedded projectile and the metal block move along ...
*February 2, 2015 by Samiboo711*

**physics**

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 4.8-kg projectile from rest to a speed of3.9 103 m/s. The net force accelerating the projectile is 4.8 105 N. How much time is ...
*October 31, 2013 by Anonymous*

**Physics**

a projectile has an initial velocity of 15.0 m/s at an angle of 30 degrees above the horizontal. What is the location of the projectile 2.0 seconds later?
*November 22, 2011 by nam maurer*

**Physics grade 11 HELP**

A cannon fires a projectile at 75 m/s at an angle of 56.7 above the horizontal. How high does the projectile get off the ground?
*May 29, 2016 by Shirley*

**algebra**

A ball is thrown into the air with an upward velocity of 28 ft/s. Its height (h) in feet after t seconds is given by the function h = –16t² + 28t + 7. How long does it take the ball to reach its maximum height? What is the ball’s maximum height? How do I solve this?
*March 26, 2012 by Jin*

**help please, up for it?**

a rock is thrown vertically upwards with an initial velocity of 30 m/s. Neglecting air resistance, calculate a) the maximum height reached b) the time taken to reach maximum height v1 = 30 m/s v2 = 0 m/s a = negative gravity simple plug n chug to find height (distance) and time
*October 7, 2006 by lovable*

**physics**

A projectile (mass = 0.269 kg) is fired at and embeds itself in a target (mass = 1.34 kg). (The target is initially stationary). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (...
*October 16, 2008 by chris*

**Physics**

A projectile (mass = 0.10 kg) is fired at and embeds itself in a target (mass = 2.11 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (with the projectile in it) carry off ...
*February 22, 2011 by Lauren*

**projectile motion**

A home run just clears a fence 105 m from home plate. The fence is 4.00 m higher than the height at which the batter struck the ball, and the ball left the bat at a 31.0° angle above the horizontal. At what speed did the ball leave the bat
*November 14, 2010 by leila*