1. Physics

    A child with a mass of 35.0 kg climbs onto a water slide that is 2.00 m above the water as shown. The child does not push off, and so is at rest when the sliding begins. The slide is very slippery, and is considered frictionless. (i) What is the work done

    asked by Meder on March 2, 2013
  2. physics

    4(a) What is the magnitude of the gravitational force of the Earth on a surveillance satellite of mass 1040 kg that is in a grazing circular orbit 100 km above the surface of the Earth. (b) Find the magnitude of the acceleration of a satellite in such a

    asked by joey on April 22, 2013
  3. Physics

    if the unit of power is the watt (W), and P = Fd/t, show using the result of question (2) and the fact that distance (d) uses units of meters and time has units of seconds. *** question 2. If m represents mass in kg, v represents speed in m/s, and r

    asked by Allana on September 12, 2011
  4. math

    the jenkins started their trip with a full tank of gas and 48,961 miles on their car.They stopped and filled the gas tank seven hours later with 14.0 gallons of gas.At that time the car total mileage was 49,381. what was the car average speed in miles per

    asked by jasmine on January 7, 2013
  5. Physics

    A sailboat is traveling east at 8.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.30 m/s2 35° north of east). What is the boat's speed 10.0 seconds later when the gust subsides? What is the boat's direction (in deg) 10.0 seconds later

    asked by Me on September 26, 2011
  6. physicsss

    while driving his sports car at 20.0 m/s down a four-lane highway, eddie comes up behind a slow-moving dump truck and decides to pass it in the left lane. If eddie can accelerate at 5.00 m/s2) (squared) how long will it take for him to reach a speed of

    asked by confusedd!HELPP!!! on September 11, 2007
  7. Physics

    A 65 kg student consumes 2500 Cal each day and stays at the same weight. For three days in a row, while visiting his parents, she eats 3500 Cal and, wanting to keep from gaining weight decides to "work off" the excess by jumping up and down. With each

    asked by Live on January 11, 2019
  8. physics

    A 25.0 kg block is pulled 4.5 meters up a 20° rough incline by an applied force Fa = 200 N, directed up the ramp. The block starts from rest and has a final speed of 1.5 m/s. Find the following: a) The total work done on the block, Wtot =___ J b) The work

    asked by Dar on February 22, 2010
  9. physics

    A 12.0-g piece of clay is launched horizontally at a 102-g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 52 N/m. The piece of clay sticks to the side of the block. If the

    asked by sherry on March 8, 2016
  10. Calculus

    A road perpendicular to a highway leads to a farmhouse located 6 mile away. An automobile traveling on the highway passes through this intersection at a speed of 55mph. How fast is the distance between the automobile and the farmhouse increasing when the

    asked by Nicole on April 10, 2015
  11. physics

    A 12.0-g piece of clay is launched horizontally at a 102-g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 52 N/m. The piece of clay sticks to the side of the block. If the

    asked by sherry on March 7, 2016
  12. Calc

    An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. I really don't know... would it be

    asked by Chelsea on September 19, 2010
  13. Physics

    One guideline for how diffraction affects shadows is that distinct shadows are created if the width of something is a minimum of 10 times greater than the wave’s wavelength. What would be the narrowest width of something to make a distinct shadow with

    asked by Anonymous on March 12, 2017
  14. physics

    a rock is thrown horizontally with a speed of 17 m/s from a vertical cliff of height 34 m. A- I solved for t=2.63 B-How far will it land from the base of the cliff? im using x=xo+vox*t i get -6.46 and it is wrong. What am I doing wrong? C-What is the

    asked by tommy on September 6, 2010
  15. Physics

    A baseball player is approaching home plate with a speed of 5.8m/s when he decides to slide. He slides for 1.1s, just reaching the plate safe. What is the magnitude and direction of the player's acceleration? How far did he slide? His magnitude of

    asked by Jamie on September 11, 2010
  16. physics

    A small stone of mass m is stuck on the periphery of a wheel of radius R rolling along the x-axis with a constant speed v. The centre of the wheel was at x = 0 at time t = 0, and stone was on the ground at that time. Find the angular momentum of the stone

    asked by anil on October 23, 2010
  17. Physics

    A car starts from rest and travels along a circular track with a radius of 55.0 meters. The car starts out at a position due East of the center of the track, heading due North initially around the track, which is counterclockwise. The car increases its

    asked by Diana on October 18, 2010
  18. Physics

    One guideline for how diffraction affects shadows is that distinct shadows are created if the width of something is a minimum of 10 times greater than the wave’s wavelength. What would be the narrowest width of something to make a distinct shadow with

    asked by Anonymous on March 10, 2017
  19. physics

    A car starts from rest and travels along a circular track with a radius of 55.0 meters. The car starts out at a position due East of the center of the track, heading due North initially around the track, which is counterclockwise. The car increases its

    asked by Diana on October 18, 2010
  20. Physics

    True or false 1. When a wave reaches the boundary of a new medium,part of the wave can be reflected and part of the wave can be transmitted into the new medium. 2. When a wave crosses a boundary between a thin and a thick rope its frequency changes, but

    asked by Dove on November 23, 2014
  21. Physics

    In a car crash, Car A rear ends Car B that stopped at a red light. After the crash, Car A and Car B meld together moving at a speed of 14 m/s. Car A has a mass of 1750 kg. Car B has a mass of 2000 kg. Calculate the initial momentum of Car A. So far I have

    asked by Rebecca on November 30, 2015
  22. physics

    A car travelling at a constant speed of 136 km/hr passes a tropper hidden behind a billboard. One second after the speeding car passes the billboard, the tropper sets in a chase after the car wit ha constant acceleration of 3.8 m/s^2. How far does the

    asked by nikki on September 29, 2011
  23. physics

    Block M = 7.50 kg is initially moving up the incline and is increasing speed with a = 3.82 m/s2 . The applied force F is horizontal. The coecients of friction between the block and incline are s = 0.443 and k = 0.312. The angle of the incline is 25.0

    asked by waqas on August 6, 2011
  24. Physics

    The density of copper is 9.8 kilograms per meter cube and the density of gold is 1.9 kilograms per meter cube. When two wires of these metals are held under the same tension, the wave speed in the gold is found to be half that in the copper wire. What is

    asked by Samuel on October 8, 2016
  25. algebra

    the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for his business everyday his route takes him 22.5 miles against the current and back to his deck and he needs this trip in a total

    asked by stan loona on March 12, 2019
  26. physic

    A 1.57-kg particle initially at rest and at the origin of an x-y coordinate system is subjected to a time-dependent force of F(t) = (7.00ti − 8.00j)N with t in seconds. (a) At what time t will the particle's speed be 19.0 m/s? s (b) How far from the

    asked by joy on February 8, 2018
  27. Math

    Plane A and B ate both flying eastward with constant velocity in the same horizontal plane at angles 30 degrees and 60 degrees with respect to the horizontal respectively. The speed of A is 100 square root of 3 miles per second. Initially, the pilot of

    asked by Rian on March 8, 2017
  28. physics

    A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre

    asked by Edwin on March 28, 2010
  29. physics

    A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre

    asked by Edwin on March 27, 2010
  30. college physics

    A 0.580-kg bucket rests on a scale. Into this bucket you pour sand at the constant rate of 85.0 g/s. A)If the sand lands in the bucket with a speed of 4.30 m/s, what is the reading of the scale when there is 0.770 kg of sand in the bucket? B)What is the

    asked by Kyle on March 18, 2010
  31. physics

    A water skier, moving at a speed of 6.42 m/s, is being pulled by a tow rope that makes an angle of 39.7 ° with respect to the velocity of the boat (see the drawing). The tow rope is parallel to the water. The skier is moving in the same direction as the

    asked by bam on February 1, 2011
  32. PHYSICS

    A 200g block slides back and forth on a frictionless surface between two springs, as shown. The left-hand spring has k = 130 N/m and its maximum compression is 16cm. The right-hand spring has k = 280 N/m. Find (a) the maximum compression of the right-hand

    asked by Sarah on February 12, 2014
  33. physics

    A 4.6 kg block starts at rest and slides a distance d down a frictionless 31.0° incline, where it runs into a spring. The block slides an additional 24.0 cm before it is brought to rest momentarily by compressing the spring, whose spring constant is 421

    asked by please help:) on March 28, 2012
  34. physics

    Andy (mass 80 kg) uses a 3.0 m long rope to pull Bob (mass 60kg) across the floor (uk= .2) at a constant speed of 1.0 m/s. Bob signals to Andy to stop by plucking the rope, sending a wave pulse forward along the rope. The pulse reashes andy 150 ms later.

    asked by Will on September 24, 2010
  35. Algebra

    A train leaves Danville Junction and travels north at a speed of 75 km/h. Two hours later, a second train leaves on a parallel track and travels north at 125 km/h. How far from the station will they meet? I have no idea what the system of equations would

    asked by Willow on February 23, 2009
  36. Physics

    A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 745 m/s. The barrel is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.020 m below the center. What is the horizontal distance between the

    asked by Anonymous on October 20, 2010
  37. physics

    A 57.0 kg diver dives from a height of 15.0 m. She reaches a speed of 14.0 m/s just before entering the water. (a) What was the average force of air resistance (e.g., friction) acting on the diver. (b) What is the force of friction underwater if she

    asked by monica on April 13, 2013
  38. physics

    A white billiard ball with mass mw = 0.1 kg is moving with a speed of v = 0.5 m/s making angle 60 degree and collides with a black billiard ball with the same mass mb = 0.1 kg that is initially at rest. The distance between the black ball and the pocket is

    asked by rayan on November 20, 2014
  39. This is grade 12 biology

    What is the effect of enzyme concentration on enzyme activity? Explain how much enzyme activity changes as enzyme concentration decreases, and discuss why this occurs (on a molecular level). Is this right (and can you add more): As enzyme concentration

    asked by Gilmore on February 27, 2008
  40. physics

    A 57.0 kg diver dives from a height of 15.0 m. She reaches a speed of 14.0 m/s just before entering the water. (a) What was the average force of air resistance (e.g., friction) acting on the diver. (b) What is the force of friction underwater if she

    asked by monica on April 13, 2013
  41. physics ( please help me)

    A 2.00kg block is pushed against a spring with force constant k=400N(m^-1), compressing it 0.180m. The block is then released and moves along a frictionless horizontal surface and then up frictionless incline with slope angle 37.0degrees. a. What is the

    asked by taylor on February 23, 2012
  42. physics

    Many professional golfers can hit a golf ball 300 meters with a driver. The face of a driver and the swing pattern causes the ball to leave the club at around 18 degrees from the horizontal. Assuming the ball travels exactly 300 meters in the air before it

    asked by becky on February 6, 2012
  43. Physics

    Two cars collide as shown in the figure. The yellow car is initially heading east and has a mass of 1000 kg. The red truck is initially heading north and has a mass of 2000 kg. The two vehicles collide, stick together, and veer off at a velocity of 16 m/s

    asked by David on November 10, 2015
  44. physics

    A model rocket is launched straight upward with an initial speed of 47.7 m/s. It accelerates with a constant upward acceleration of 2.02 m/s2 until its engines stop at an altitude of 157 m. What is the maximum height reached by the rocket? How long after

    asked by cat on January 23, 2014
  45. physics

    1.Moving with uniform acceleration a body covers 150m during 10sec so thet it covers 24m during the 10th sec .What is the initial velocity and the acceleration of the body. 2.A runner travels 1.5 laps around a circular track of 50sec .The diameter of the

    asked by srikar on May 19, 2012
  46. Physics

    A ring (hollow cylinder) of mass 2.89kg, inner radius 5.35cm, and outer radius 6.35cm rolls (without slipping) up an inclined plane that makes an angle of θ=35.6°, as shown in the figure below. At the moment the ring is at position x = 1.87m up the

    asked by Andrea on July 5, 2016
  47. Physics

    In the school cafeteria, a trouble-making child blows a 12.0 g spitball through a 25.0 cm straw. The force of her breath as a function of the distance along the length of the straw can be modeled as 10-50x^2-70x^3 where force is in newtons and x is in

    asked by Chad on August 8, 2012
  48. Physics

    A ring (hollow cylinder) of mass 2.89kg, inner radius 5.35cm, and outer radius 6.35cm rolls (without slipping) up an inclined plane that makes an angle of θ=35.6°, as shown in the figure below. At the moment the ring is at position x = 1.87m up the

    asked by Tim on July 4, 2016
  49. physics

    A rectangular wire loop of dimensions a×b, with a=3.5 cm and b=4.5 cm, is pulled parallel to side a at a constant speed v=4.3 m/sec into a region where the magnetic field, |B|=0.125 T, is uniform and perpendicular to the loop. The loop enters the magnetic

    asked by abdul rahman on April 6, 2013
  50. Math help - Conversion

    Good Evening everyone I'd like to propose a valid question on the mathmatical topic about finding area's under the speed- time graphs that represent the distance travelled. Iam aware that the area is actually equal to the distance travelled . But reallt

    asked by Student A on November 25, 2007
  51. English

    What winter sport do you like most? 1. I lke curling because it's fun to see players hit big stones. 2. I like bobsledding because it's thrilling to ride a bobsled. 3. I like speed skating because I like wild races. 4. I like ski jumping because I like

    asked by rfvv on October 3, 2014
  52. Physics

    An engine is used to pull a train of two cars out of a mine. The floor slopes upward at an angle of 24o. Each car has a mass of 0.8x104 Kg and normally travels without friction on the tracks. The engine can exert a maximum force of 1.4x105 N on car A. If

    asked by Charlie on February 24, 2008
  53. physics

    A dart gun is fired while being held horizontally at a height of 0.90 m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 4.00 m. A college student holds the same gun in a horizontal

    asked by chad on September 24, 2008
  54. Math

    Matthew is riding a ferris wheel at a constant speed of 2 revolutions per minute. The boarding height for the wheel is 1m, and the radius is 7m. a) What is the equation of the function that describes Matthew's Height in (m) in terms of time in minutes,

    asked by Dyrone on June 3, 2016
  55. Physics

    A toy gun uses a spring to project a 6.1 g soft rubber sphere horizontally. The spring constant is 12.0 N/m, the barrel of the gun is 12.6 cm long, and a constant frictional force of 0.031 N exists between barrel and projectile. With what speed does the

    asked by Santa on March 15, 2014
  56. physics

    A toy gun uses a spring to project a 5.6 g soft rubber sphere horizontally. The spring constant is 10.0 N/m, the barrel of the gun is 14.3 cm long, and a constant frictional force of 0.036 N exists between barrel and projectile. With what speed does the

    asked by Anonymous on February 16, 2012
  57. physics

    A satellite moves in a circular orbit around Earth at a speed of 4390 m/s (a) Determine the satellite's altitude above the surface of Earth.(meters) (b) Determine the period of the satellite's orbit. (hours) I used the equation M(sattelite)V^2/r =

    asked by Kelsey on April 10, 2010
  58. physics

    REPOST PLEASE HELP a rock is thrown horizontally with a speed of 17 m/s from a vertical cliff of height 34 m. A- I solved for t=2.63 B-How far will it land from the base of the cliff? im using x=xo+vox*t i get -6.46 and it is wrong. What am I doing wrong?

    asked by tommy on September 7, 2010
  59. PHYSICS

    A boy is whirling around a stone tied at the end of a 0.55 m long string at constant angular speed of 5 revolutions per second in a plane perpendicular to the ground. The string breaks when it is making an angle of 53 degrees above the horizontal and the

    asked by Jadelyn on November 29, 2009
  60. Physics

    A dart gun is fired while being held horizontally at a height of 0.90 m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 4.00 m. A college student holds the same gun in a horizontal

    asked by Chad on September 24, 2008
  61. physics help 4 please!!

    Two turtles (each 2 kg) sit on an approximately massless branch in the water. They sit on opposite sides of the branch's center, each 3 m away. The branch (10 m long) is spinning at 2 rad/s about its center (nearly without friction). Now, if both turtles

    asked by kelsey on October 31, 2008
  62. Physics

    What is the magnitude of the acceleration of two falling sky divers (mass 149 kg including parachute) when the upward force of air resistance is equal to one fourth of their weight? (in m/s^2) After popping open the parachute, the divers descend leisurely

    asked by Madison on February 10, 2015
  63. physics

    A dart gun is fired while being held horizontally at a height of 1.00 m above ground level and while it is at rest relative to the ground. The dart from the gun travels a horizontal distance of 5.00 m. A college student holds the same gun in a horizontal

    asked by ben on October 3, 2010
  64. mechanics 12

    A 1.8 kg breadbox on a frictionless incline of angle θ = 37° is connected, by a cord that runs over a pulley, to a light spring of spring constant k = 120 N/m, as shown in the figure below. The box is released from rest when the spring is unstretched.

    asked by kunal on November 2, 2012
  65. physics

    A hockey puck of mass m = 120 g is attached to a string that passes through a hole in the center of a table, as shown in the figure below. The hockey puck moves in a circle of radius r = 0.50 m. Tied to the other end of the string, and hanging vertically

    asked by jyothi on February 16, 2015
  66. physics

    A bullet of mass = 0.13 kg is fired with a velocity of = 87.1 m/s into a solid cylinder of mass = 17.1 kg and radius = 0.29 m. The cylinder is initially at rest and is mounted on a fixed vertical axis that runs through its center of mass. The line of

    asked by shelby on April 2, 2008
  67. Physics

    A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 17.0 m/s when the hand is 1.50 m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of

    asked by Erika on September 17, 2015
  68. Physics

    A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 11 m/s when the hand is 1.8 m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the

    asked by Sarah on January 18, 2012
  69. physics

    A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 14.0 when the hand is 2.30 above the ground.How long is the ball in the air before it hits the ground? (The student moves her hand out of the

    asked by sam on January 25, 2011
  70. Physics

    Car A passes a light post moving at 25m/s and continues at this speed. Two seconds later, another car passes the light post moving at 40m/s. Assuming no acceleration of either car. a)How much time will it take for the second car to catch up with the first

    asked by Coco on February 12, 2012
  71. Basic Physics

    While standing on an open bed of a truck moving at 35 m/s, and archer sees a duck flying directly overhead. The archer shoots an arrow at the duck and misses. The arrow leaves the bow with a vertical velocity of 98 m/s. a) how long does it remain in the

    asked by Caleb on December 18, 2012
  72. phusics

    At the end of most landing runways in airports, an extension of the runway is constructed using a special substance called formcrete. Formcrete can support the weight of cars, but crumbles under the weight of airplanes to slow them down if they run off the

    asked by joe on September 30, 2013
  73. physics question

    While sitting in a math class, you become curious and decide to put the math and your physics to work in a practical way. If you can shoot a spit-wad from a straw with a total speed of 6 m/s, at what angle would you have to shoot it in order for it to hit

    asked by anonymous on September 21, 2018
  74. Calculus 3

    A medieval city has the shape of a square and is protected by walls with length 550 m and height 16 m. You are the commander of an attacking army and the closest you can get to the wall is 100 m. Your plan is to set fire to the city by catapulting heated

    asked by Jerry on October 7, 2012
  75. Algebra

    The speed of a moving sidewalk at an airport is 3 ​ft/sec. A person can walk 79 ft forward on the moving sidewalk in the same time it takes to walk 15 ft on a nonmoving sidewalk in the opposite direction. At what rate would a person walk on a

    asked by Claudia on February 12, 2017
  76. physics

    a. A stone is dropped at t = 0 s. A second stone, with a mass 2.0 times that of the first, is dropped from the same point at t = 0.25 s. How far from the release point is the center of mass of the two stones at t = 0.52 s? Assume that neither stone has yet

    asked by shila on January 9, 2016
  77. Maths B

    From the top of height y m the angle of depression of a Channel swimmer at X is 30°. She swims directly towards the base of the cliff such that 1 minute later, at Y, the angle of depression from the top of the cliff to the swimmer is 50°. Given that her

    asked by IBM on August 8, 2016
  78. algebra

    The function D (t) = 13t^2 to the second power – 120t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 170 feet. The time to skid 170 feet is __________ seconds.

    asked by mm on January 31, 2016
  79. Accounting

    The Ritz Manor is a popular seaside resort. A double room costs $220 for one night. To reserve a room, guests must pay one night’s stay in advance. On each floor of the hotel, Vendalite Company operates vending machines with energy bars, juices, and

    asked by Stephanie on March 28, 2012
  80. physics

    This is a two-part question, and I got the first part, but I do not know how to do the second part. Two students walk in the same direction along a straight path, at a constant speed- one at 0.90 m/s and the other at 1.90 m/s. a) Assuming that they start

    asked by Anonymous on October 24, 2006
  81. Physics

    A communications satellite is moving at a constant speed in a circular orbit around Earth. At any given instant in time, what is the resultant force on the satellite? A. zero B. equal to the gravitational force on the satellite C. equal to the vector sum

    asked by Nate on May 3, 2018
  82. Spanish

    Hey can someone proofread my spanish work? it has to be mostly in present perfect so it may not sound right but that's how it's supposed to be. Thanks! SPANISH: Enrique ha llamado el teleoperator a pedir un número de teléfono. El está enojado porque el

    asked by JYD on October 9, 2006
  83. Physics

    A car and a truck starts from rest at the same instant, with the car initially at some distant behind the truck. The truck has a constant acceleration of 2.1 m/s^2, and the car at 3.4 m/s^2. The car overtakes the ruck after it has moved 40.0 m. a) how much

    asked by April Catubig on December 14, 2015
  84. physics

    speed of blood flow is 30 cm/s near the heart, but only 20 cm/s at a point 40 cm farther along the arterial pathway. a. how do you find the velocity for that 40 cm distance? b. the time it takes the blood to flow 40 cm? a. The average velocity over the 40

    asked by tim on September 3, 2006
  85. physics

    The figure below shows a general situation in which a stream of people attempt to escape through an exit door that turns out to be locked. The people move toward the door at speed v = 4.1 m/s, are each d = 0.30 m in depth, and are separated by L = 1.75 m.

    asked by Savannah on September 3, 2011
  86. science

    A ball is throen vertically downward from the rop of a 36.6 m tall building . The ball passes the top of a window that is 12.2 m above the groung 2.00s after being thrown. What is the speed of the ball as it passes the top of the window? Would i need to

    asked by Jen on September 12, 2006
  87. PHYSICS

    A variable length air column (closed on one end) is placed just below a vibrating wire of mass 5.00g, which is fixed at both ends. The length of the air column is gradually increased from zero until the first position of resonance (first harmonic) is

    asked by Aaron on February 11, 2015
  88. physics

    A massless string runs around two massless, frictionless pulleys. An object with mass m = 20 kg hangs from one pulley. A force F is exerted on the free end of the string to lift the object at a constant speed by a distance of 2.3 m. What is the work done

    asked by m2a on November 16, 2009
  89. physics

    The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 × 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the

    asked by Anonymous on November 27, 2012
  90. Physics

    A platform rotates at an angular speed of 2.2 rad/s. A block rests on this platform a distance of 0.3m from the axis. (friction coefficient .5) Without any external torgue acting on the system, the block is moved toward the axis. Ignore the moment of

    asked by Lola on May 5, 2010
  91. physics

    The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 × 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the

    asked by Anonymous on November 27, 2012
  92. physics

    a block sits on a frictionless inclined plane, attached to another block over a frictionless pulley. the angle of the incline is 20 degrees. what is the tension in the rope and the acceleration of the system? B) what is the speed of the system after the

    asked by kassy on October 12, 2016
  93. Physics

    Water flows from a fire truck through a hose that is 11.7 cm in diameter and has a nozzle that is 2.0 cm in diameter. The firemen stand on a hill 5.0 m above the level of the truck. When the water leaves the nozzle, it has a speed of 20.0 m/s. 1) Determine

    asked by Al on April 10, 2017
  94. physics

    a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second.

    asked by D on November 2, 2013
  95. physics

    A model rocket is launched straight upward with an initial speed of 51.6 m/s. It accelerates with a constant upward acceleration of 1.96 m/s2 until its engines stop at an altitude of 230 m. What is the maximum height reached by the rocket? The acceleration

    asked by a on October 12, 2011
  96. physics

    The largest grand piano in the world is really grand. Built in London, it has a mass of 1.25 × 103 kg. Suppose a pianist finishes playing this piano and pushes herself from the piano so that she rolls backwards with a speed of 1.4 m/s. Meanwhile, the

    asked by Anonymous on November 27, 2012
  97. phy 231

    Tall buildings are flexible and undergo simple harmonic motion (SMH) when excited by wind. Suppose the top floor of a skyscraper is in SMH, swaying back and forth with a frequency of 0.181 Hz and an amplitude of 1.5 m. a.What is the maximum speed

    asked by Andrea on March 8, 2016
  98. physics

    A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 795 m/s. The barrel is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.042 m below the center. What is the horizontal distance between the

    asked by Roger on October 13, 2010
  99. Algebra

    Suppose it takes 3 days for a space vehicle to travel from earth to the moon. How long for the same vehichle and the same speed to reach Jupiter? Moon distance from earth is 240,000 miles. Jupiter distance from earth is 391,000,000 miles

    asked by TAnya on March 20, 2010
  100. physics

    A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 692 m/s. The barrel is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.0239 m below the center. What is the horizontal distance between the

    asked by shyne on September 28, 2012

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