1. physics

    An aircraft has a take-off speed 180km/h and has length 250m from the start just before take-off a serious snag is detected in the engine and the aircraft failed to take-off. There is a wall at a distance of 270 m from takeoff point

    asked by deepali on October 17, 2017
  2. Science

    Awake on astring is described by the following equation y=(15cm)cos(3.14/5.0cm x_3.14/12s t.what is the amplitude of this wave?what is its wavelength?what is its period? What is its speed? In which direction does the wave travel

    asked by Anonymous on April 30, 2019
  3. Physics(urgent)

    A stream of water from the nozzle of a fire hoZe emerges horizontally with a speed 16m/s. the nozzle is 20m above the ground, find the time ot hits the groun

    asked by Aika on January 11, 2012
  4. Calc

    A plane is heading on a bearing of 200° with an air speed of 400 km/h when it is blown off course by a wind of 100 km/h from the northeast. Determine the resultant ground velocity of the plane.

    asked by Amy on February 21, 2015
  5. ccs trigo

    A pilot is flying at a heading of 96° at 225 miles per hour wind is blowing from the south west at a heading of 37° find the ground speed and courses of the plane

    asked by mark on September 14, 2014
  6. Physics

    A train is traveling south at 23.5 m/s when the brakes are applied. It slows down with a constant rate to a speed of 5.01 m/s in a time of 8.73 s. How far does the train travel during the 8.73 s? I have already found -Acceleration during braking: -2.12m/s

    asked by Ethan on September 16, 2015
  7. Chemistry

    A 247 lb fullback runs the 40 yd dash at a speed of 17.09 ± 0.1 mi/h. (a) What is his de Broglie wavelength (in meters)? (b) What is the uncertainty in his position? ** I found part A but I am unsure how to use this information to get part B. Any help is

    asked by Amanda on March 11, 2014
  8. physics

    a machine gun fires 10 bullets persecond into a target. each bullet weights 20 gm and had a speed of 1500 m per second .find the force neccessary to hold the gun in posotion?

    asked by sunny on April 5, 2012
  9. science

    A bolt of mass 0.3 kg falls from The ceiling of an elevator moving down with a uniform speed of 7m/s.It hits the floor of the elevator and does not rebound.What is the heat produced by the impact?g=9.8m/s to the power 2 .

    asked by anirban maity on August 25, 2015
  10. Physics

    A spaceship with a mass of 4.60 10^4 kg is traveling at 6.30 10^3 m/s relative to a space station. What mass will the ship have after it fires its engines in order to reach a speed of 7.84 10^3 m/s? Assume an exhaust velocity of 4.86 10^3 m/s.

    asked by Anonymous on March 5, 2014
  11. PHYSICS

    A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?

    asked by Liz on October 1, 2012
  12. phisic

    Consider an airplane that normally has an air speed of 120 km/h in a 105 km/h crosswind blowing from west to east. Calculate its ground velocity when its nose is pointed north in the crosswind?

    asked by macarena on February 22, 2011
  13. Trig.

    Help with this problem please. I don't get it at all. A ship is heading due north at 12 mph. The current is flowing southwest at 4mph. Find the actual bearing and speed of the ship.

    asked by Shane on March 30, 2010
  14. College Elementary Algebra

    June rowed 45 upstream. The next day she rowed the same distance Downstream taking her 4hrs less. If she can row 7mph in still water, find the speed of the current river.

    asked by WhenSheSmiles on October 23, 2017
  15. Physics

    A daredevil decides to jump a canyon of width 10 m. To do so, he drives a motorcycle up an incline sloped at an angle of 15 degrees. What minimum speed must he have in order to clear the canyon?

    asked by Susan on January 10, 2012
  16. physics

    An outfielder throws a baseball with an initial speed of 30 m/s at an angle of 13° to the horizontal. The ball leaves his hand from a height of 1.75 m. How long is the ball in the air before it hits the ground?

    asked by Nate on May 21, 2012
  17. physics

    a 2575 kg van runs into the back of a 825 kg compact car at rest. They move off together at 8.5 m/s. Assuming no friction with the ground, find the initial speed of the van.

    asked by Nilan on February 7, 2011
  18. physics

    A flat (unbanked) curve on a highway has a radius of 220m. A car rounds the curve at a speed of 25m/s. What is the minimum coefficient of friction that will prevent sliding?

    asked by Shelby on March 28, 2015
  19. Physics

    Sam tosses a ball horizontally off a footbridge at 4.3 m/s. How much time passes after he releases it until its speed doubles? Can someone please explain the correct equation to use thoroughly and help me to find the correct answer?!

    asked by Megan on May 25, 2012
  20. 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

    asked by jessica on October 14, 2012
  21. physics

    An electron with speed = 2.54×10^7m/s is traveling parallel to an electric field of magnitude = 1.66×104 N/C. How far will the electron travel before it stops? How much time will elapse before it returns to its starting point?

    asked by Elmer on February 21, 2013
  22. physics

    pilots can survive radial acceleration up to 9g(88m/s^2). can a fighter pilot flying at a constant speed of 500m/s and in a circle that has a diameter of 8800 m survive to tell about his experience?

    asked by kristen on June 30, 2014
  23. physics

    A simple pendulum has a length of 1.5 m and is pulled a distance y = 0.24 m to one side and then released. (Assume small angle.) What is the speed of the pendulum when it passes through the lowest point on its trajectory?

    asked by pete on December 10, 2010
  24. physics

    Q A man throws a ball weighing 500g vertically upwards witha speed of 10m/s. 1) what will be its initial momentum? 2) What would be its momentum at the highest point of his flight?

    asked by asd on November 11, 2011
  25. physics

    Q A man throws a ball weighing 500g vertically upwards witha speed of 10m/s. 1) what will be its initial momentum? 2) What would be its momentum at the highest point of his flight?

    asked by asd on November 11, 2011
  26. Physics

    The "hang time" of a punt is measured to be 4.00 s. If the ball was kicked at an angle of 53.0° above the horizontal and was caught at the same level from which it was kicked, what was its initial speed? (Neglect air resistance.)

    asked by Robert C on December 8, 2009
  27. Math

    George is driving at an average speed of 62 miles per hour.write an expression that would give his distance traveled for h hours .make a table 3,5.5,7 and 8.5 hours ???? HELPPPP ME

    asked by Yesy on July 1, 2018
  28. physics

    A skateboarder, with an initial speed of 2.4m/s , rolls virtually friction free down a straight incline of length 19m in 3.5m/s .At what angle theta is the incline oriented above the horizontal?

    asked by Anonymous on February 14, 2013
  29. physics

    the speed of train is reduced from 60km/h at the same time as it travel a distance of 450m if retardation is uniform find how much further it will travel approx befor coming rest?

    asked by tarique on November 7, 2015
  30. physics

    A driver in a car traveling at a speed of 79 km/h sees a cat 107 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 103 m? Answer in units of s

    asked by Asdfghjkl on October 13, 2011
  31. physics 1401!!!

    A 2000-kg car rounds an unbanked curve with a radius of 45 m at a speed of 15 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)

    asked by help me plzz (: on July 6, 2015
  32. physics

    A cannonball is shot with initial speed 230m/s at a 50-degree angle above the horizontal. Assuming air resistance is negligible, what is the acceleration of the cannonball when it is at its maximum height?

    asked by Cali on June 1, 2018
  33. physics

    A car of mass 907 kg coasts on a level road, starting with an initial speed of 14.2 m/s and coming to rest 15.2 s later. Find the frictional force acting on the car.

    asked by Brett on February 20, 2012
  34. Physics

    A sprinter of mass 63.7 kg runs at a constant speed of 10.2 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.8 m.

    asked by Anonymous on February 13, 2012
  35. physics

    if i ran a 4.6 forty yard dash and i ran down hill at a max speed of 18 miles per hour and punched you right in the face how many foot pounds of pressure would my hit have

    asked by Charles on October 14, 2011
  36. physics

    A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. What is the horizontal velocity component of the ball? Round the answer to the nearest tenth of a m/s.

    asked by Anonymous on December 9, 2016
  37. Physics

    A car starts from rest, accelerate at 2m/s , for 15sec , it then continues at a steady speed for further 25sec and decelerate to rest in 5ecs . Find the time taken to cover *two-third* of the distance.

    asked by Mjay on May 14, 2018
  38. math(mechanics)

    the velocity of a particle traveling in a straight line is given by v=(6t-3t^2)m/s, where t is in seconds, if s=0 when t= 0. determine the particles deceleration and position when t=3s. how far has the particle traveled during the 3s time interval and what

    asked by chanz11 on April 18, 2012
  39. physics

    A freight train has a mass of 3.2 × 107 kg. If the locomotive can exert a constant pull of 7.1 × 105 N, how long would it take to increase the speed of the train from rest to 74.6 km/h? (Disregard friction.)

    asked by jena on January 9, 2011
  40. Physics

    A jet catapult on an aircraft carrier accelerates a 200kg plane uniformly from rest to a launch speed of 320km/h in 2.0s. What is the magnitude of the net force on the plane?

    asked by Glenn on October 27, 2009
  41. physics

    A string has a linear density of 8.5*10^-3 kg and is under the tension of 280 N. The string is 1.8 m long, is fixed at both ends, and vibrating in the standing wave pattern. What is the speed, length, and frequency?

    asked by David on December 12, 2010
  42. physics

    Microwave ovens typically cook food using microwaves the a frequency of about 3.00 GHz (gigahertz 10 to the nine Hz). Show the wavelength of these microwaves traveling at the speed of light is 10cm.

    asked by bubba1 on July 7, 2013
  43. physics

    . A 1030-kg car going 3.4 m/s through a parking lot hits and sticks to the bumper of a stationary 1140-kg car. Find the speed of the joined cars immediately after the collision.

    asked by derrelk on May 12, 2015
  44. physics

    What is the terminal speed for an 81.0 kg skier going down a 41.0degree snow-covered slope on wooden skis mu_k= 0.060? Assume that the skier is 1.60 m tall and 0.500 m wide.

    asked by sam on October 27, 2009
  45. Physics

    Your mass is 50 kg. Suppose you are standing on a scale in an elevator which starts moving up and increases its speed at the rate of 2 m/s every second. What would be the reading on the scale? A) 590 N B) 490 N C) 390 N D) 100 N E) 0

    asked by Anonymous on July 8, 2014
  46. physics

    A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. What is the vertical velocity component of the ball? Round the answer to the nearest tenth of a m/s.

    asked by Anonymous on October 12, 2011
  47. physics

    A tire placed on a balancing machine in a service station starts from rest and turns through 10.8 revolutions in 8.48 s before reaching its final angular speed. Calculate its angular acceleration.

    asked by Emily on March 14, 2011
  48. physics

    To get off a frozen frictionless lake, a 70.0 kg person takes off a 0.150 kg shoe and throws it horizontally directly away from the shore with a speed of 2.00 m/s. If the perrson is 5.00 m from the shore, how long does it take for her to reach it?

    asked by Anonymous on February 12, 2010
  49. Physics

    A wrench falls out of the gondola of a balloon that is 520 m above the ocean. Assuming negligible air resistance, what was the wrench’s speed as it hit the water? The acceleration of gravity is 9.8 m/s2 .

    asked by Laura on October 12, 2011
  50. Science

    2 racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that each makes a complete circle in same time t. The ratio of Angular speed of the first car to the second car is?

    asked by ABC on November 3, 2015
  51. physics

    a car moves north with a constant velocity of 50km/hr.how far will it have traveeled in 4hours?the return trip takes 8hours. what is the average speed for the entire trip?

    asked by asma on May 10, 2017
  52. Physics

    A student applies a force of magnitude 39.0 N at an angle of 22.6o with the horizontal to push a 4.00-kg textbook 1.00 m across a table from rest to a final speed of 1.75 m/s. Find the work done by friction on the textbook.

    asked by Smith on July 18, 2012
  53. Physics

    A student applies a force of magnitude 39.0 N at an angle of 22.6o with the horizontal to push a 4.00-kg textbook 1.00 m across a table from rest to a final speed of 1.75 m/s. Find the work done by friction on the textbook.

    asked by Rob on July 18, 2012
  54. physics

    A 5.00×105-kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. What is the force constant k of the spring?

    asked by Anonymous on July 10, 2013
  55. simple PHYSICS

    The space shuttle had a top orbital speed of 8000 m/s and orbited in a circular orbit approximately 320 km above the earth's surface. How long was one orbit in seconds?

    asked by HELP ME...uRGENT! on April 18, 2013
  56. physics

    A 1 500-kg car rounds an unbanked curve with a radius of 52 m at a speed of 12 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)

    asked by jay on February 9, 2012
  57. physics

    An automobile accelerates from rest at 1.3m/s^2 for 19s. The speed is then held constant for 23s, after which there is an acceleration of -0.9m/s^2 until the automobile stops. What total distance was traveled? Answer in units of km.

    asked by sam on September 14, 2012
  58. physics

    A 280-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? rad/s

    asked by monic on November 30, 2012
  59. Physics

    WHen you take your 1100kg car out for a spin, you go around a corner of radius 55m with a speed of 15m/s. assuming your car doesnt skid, what is the force exerted on it by static friction?

    asked by Alyssa on November 29, 2009
  60. Physics

    A particle with a mass of 3.65×10−24 kg and a charge of 6.40×10−19 C starts at rest and is accelerated for a distance of 0.102 m through a uniform electric field having strength E = 7.25×104 N/C. What is the resulting speed of the particle?

    asked by Skippy on July 18, 2015
  61. physics

    A car traveling east at 42.4 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in 4.00 s. (a) What is the magnitude and direction of the car's acceleration as it slows down?

    asked by roger on August 29, 2012
  62. PHYSICS NEED HELP ASAP

    A car traveling 16.0m/s crates into concrete embankment and steps in 0.08s. Calculate: the initial speed in mi/hr the average acceleration of the car during the collision in m/s^2 Please show all work than you

    asked by MARIE on December 19, 2014
  63. NEED HELP ASAP PHYSICS

    A car traveling 16.0m/s crashes into concrete embankment and stops in 0.08s. Calculate: the initial speed in mi/hr the average acceleration of the car during the collision in m/s^2 Please show all work than you

    asked by MARIE on December 19, 2014
  64. Math

    find the velocity and direction of flight of a plane that is headed at 126 degrees with a ground speed of 215 mph in a 34 mi wind from south 36 degrees west

    asked by Anonymous on November 27, 2016
  65. physics

    A 20.0 gram bullet exits the rifle at a speed of 985 m/s. The gun barrel is 0.80 m long. What was the force(N) during the rocket’s launch? (Hint: note the units of the bullet!)

    asked by Anonymous on March 23, 2016
  66. physics

    The space shuttle had a top orbital speed of 8000 m/s and orbited in a circular orbit approximately 320 km above the earth's surface. How long was one orbit in seconds?

    asked by Orbital speed on April 16, 2013
  67. physics

    A particle moves in the xy-plane, starting from the origin at t = 0 with an initial velocity v0 = (20ˆi – 15ˆj) m/s and a constant acceleration of a = 4.0ˆi m/s2. Determine the particle’s speed and direction at t = 5.0 s.

    asked by anonymus on September 3, 2018
  68. physics

    A student driver backs his car out of his garage with an acceleration of 1.40m/s square. How long does it take him to reach a speed of 2.00m/s? and if he then breaks to a stop in 0.800s, what is his acceleration?

    asked by Anonymous on October 26, 2012
  69. Physics

    A sprinter of mass 63.7 kg runs at a constant speed of 10.2 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.8 m.

    asked by Mike on February 13, 2012
  70. physics

    A speedboat increases its speed uniformly from v1 = 20 m/s to vf = 26 m/s in a distance of 1.60 102 m. Substitute given values, obtaining the acceleration. Find the time it takes the boat to travel the given distance.

    asked by klew on September 2, 2011
  71. physics

    a speeder is going at a constant speed of 20m/s when a police car accelerates from rest at a rate of 4.5,/ssquared to catch them. How long did it take for the officer to reach the speeding car?

    asked by Sam on September 25, 2011
  72. physics

    A person does 250 joules of work in pulling back the string of an archery bow. What is the initial speed of a 0.25-kilogram arrow the moment after it is fired from the bow?

    asked by Anonymous on February 26, 2012
  73. chem

    As the mass of the particle is increased while the speed of the particles remains the same, would you expect the bending to increase, decrease, or stay the same? i thought it would increase because of the weight pulling it. but it was wrong

    asked by hannah on August 21, 2012
  74. physics

    A certain car is capable of accelerating at a uniform rate of .94m/s^2. What is the magnitude of the car's displacement as it accelerates uniformly from a speed of 87km/h to one of 97km/h? Answer in units of m.

    asked by Rachel on September 24, 2011
  75. Physics (Projectile Motion)

    Please reply to this one urgently: Horizontally moving plane at 600kmph speed, at a height of 1960km, drops a package at point A and it drop at point B. Find the distance between A and B.

    asked by Lost In Studies on September 28, 2010
  76. dynamics

    a 2kg ball revolves in a horizontal circle as shown at a constant speed of 1.5m/s. Knowing that L=600mm, determine (a) the angle that the cord with the vertical (b) tension in the cord.

    asked by kit on November 20, 2013
  77. Physics

    A daredevil decides to jump a canyon of width 10 m. To do so, he drives a motorcycle up an incline sloped at an angle of 15 degrees. What minimum speed must he have in order to clear the canyon?

    asked by nam maurer on November 22, 2011
  78. Physics

    A roller coaster mass of 291 kg starts stationary at point A where height 1 = 37 m, and a while later is at B, where height 2 = 11.4 m. The acceleration of gravity is 9.8 m/s^2. What is the speed of cart at B ignoring the effect of friction?

    asked by Lynn on July 24, 2013
  79. physics

    A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s

    asked by alex on September 30, 2013
  80. physics

    A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s

    asked by alex on September 30, 2013
  81. physical science

    which of newton's laws (1, 2, or 3)are used in the following: 1) spaceship reaches the speed for orbit around the earth, 2) pushing the shuttle forward in space 3) the force needed to escape earth's atmosphere

    asked by anonymous on December 31, 2010
  82. physics5

    During a walk on the Moon, an astronaut accidentally drops his camera over a tall cliff. It leaves his hands with zero speed, and after 2.1 s it has attained a velocity of 3.4 m/s downward. How far has the camera fallen after 4.2 s?

    asked by Anonymous on February 16, 2012
  83. physics

    A bullet (m = 0.0290 kg) is fired with a speed of 94.00 m/s and hits a block (M = 2.70 kg) supported by two light strings as shown, stopping quickly. Find the height to which the block rises

    asked by Anonymous on May 1, 2009
  84. maths

    Two walkers set off at the same time from a crossroad and walk along flat straight roads inclined to each other at 68 degrees.If they both walk at a speed of 6km/h,find their distance apart 10 minutes later.

    asked by Shane on March 10, 2013
  85. Physics

    An anti aircraft gun fires at an elevation of 60degree at an enemy aircraft at 10000m above the ground.at what speed must the cannon be shot to hit the plane at that height?(take g = 9.8m/s.)

    asked by Martha on November 15, 2018
  86. physics

    In a head-on collision, a car stops in 0.24 from a speed of 15 . The driver has a mass of 77 , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by the seatbelt in that fraction of a second?

    asked by kisha on September 17, 2012
  87. physics

    A car is driving up a curvy mountain road. If the car navigates at the same speed two corners that have the same radius of curvature, but the second curve is banked at twice the angle of the first, what effect will this have on the vehicle?

    asked by myra on April 25, 2012
  88. Physics

    A block of mass 5 kg, which has an initial speed of 3 m/s at time t = 0, slides on a horizontal surface. Find the magnitude of the work that must be done on the block to bring it to rest. Answer in units of J.

    asked by Dave on February 27, 2011
  89. physics

    A projectile is launched with an initial speed of 70 m/s at an angle of 35° above the horizontal on flat ground. Neglect air friction. A)What is the projectile's velocity at the highest point of its trajectory?

    asked by Cyrus on September 17, 2012
  90. algebra 1

    What is the speed, in miles per hour, of a toy car that runs 40 feet in 8 seconds? Round your answer to the nearest whole number. (1 hour = 3600; 1 mile = 5280 ft)

    asked by terri on April 5, 2013
  91. Science

    The Milky Way has a radius of approximately 100,000 light years. How many miles is that? How long would it take you to travel across our galaxy if you were traveling at 50% the speed of light (show work)?

    asked by Harold on November 19, 2013
  92. physics

    A 89.0 N grocery cart is pushed 13.0 m by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is its final speed?

    asked by katt on April 20, 2012
  93. physics

    A bicycle is supported so that in front wheel does not touch the road.The wheels diameteris 0.65 m.The wheel is spun as a rotation rate of 9.3 revolution per second.Find the speed of a point on the outside

    asked by Anonymous on November 23, 2011
  94. Physics

    A ball is thrown straight up and reaches a maximum height of 6.71 m. What was its initial speed? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m/s please give right answer and explain how you got it, thanks !

    asked by Melanie on September 20, 2012
  95. Physics

    A light-rail train going from one station to the next on a straight section of track accelerates from rest at 1.1 m/s^2 for 20 m . It then proceeds at constant speed for 110m before slowing down at 2.2 m/s^2 until it stops at the station.

    asked by Susan on February 4, 2012
  96. Physics

    A mass M of 5.80E-1 kg slides inside a hoop of radius R=1.50 m with negligible friction. When M is at the top, it has a speed of 5.15 m/s. Calculate the size of the force with which the M pushes on the hoop when M is at an angle of 41.0°.

    asked by Rach on March 24, 2011
  97. Physics

    How would you set this up? A 250-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?

    asked by Courtney on October 21, 2014
  98. chemistry

    Does copper rust in the presence of water? No. In the olden days wooden ships were coated with copper metal to prevent wood borers and increase speed.

    asked by sam on January 15, 2007
  99. physics

    An electron with initial speed = 2.54×10^7 m/s is traveling parallel to an electric field of magnitude = 1.66×10^4 N/C . How far will the electron travel before it stops? How much time will elapse before it returns to its starting point?

    asked by Elmer on February 21, 2013
  100. physics

    A projectile was fired at 35 degrees above the horizontal. At the highest point in its trajectory its speed was 200 m/s. If air resistance is ignored, the initial velocity had a horizontal component of 0. How is this possible? Someone explain it for me

    asked by AJ on November 30, 2010

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