1. AP PHYSICS MECH.

    A simple pendulum, consists of an object suspended by a string. The object is assumed to be a particle. The string, with its top end fixed, has negligible mass and does not stretch. In the absence of air friction, the system oscillates by swinging back and

    asked by vm on January 6, 2011
  2. Maths

    A flat circular disc, of radius R, can be modelled as a thin disc of negligible thickness. It has a surface mass density function given by f(r,φ) = k(1 - r2/R2), where k is the surface density at the centre and r is the distance from the centre of the

    asked by Matthew on October 28, 2013
  3. Physics

    A bullet with a mass m = 4:83 g and initial speed of 330 m/s passes through a wheel which is initially at rest as in the The wheel is a solid disk with mass M = 2.29 kg and radius R = 1.:6 cm. The wheel rotates freely about an axis through its center and

    asked by Lindsay on December 25, 2011
  4. Chemistry

    Could someone check my answers? 1. Why was 95% ethanol alcohol added when titrating aspirin in an experiment? Because it helps the aspirin dry quicker and become pure while the titration is going on. 2. Would the following mistakes cause the calculated

    asked by Jim on March 27, 2007
  5. p

    The displacement of a block of mass 778g778g attached to a spring whose spring constant is 38N/m38N/m is given by x=Asin(ωt)x=Asin(ωt) where A=25cmA=25cm . In the first complete cycle find the values of xx and tt at which the kinetic energy is equal to

    asked by kara on February 13, 2017
  6. physics

    A puck on a horizontal, frictionless surface is attached to a string that wraps around a pole of finite radius, as shown in the figure . As the puck moves along the spiral path, does its speed increase, decrease, or stay the same?

    asked by Patrick on January 22, 2012
  7. Physics

    The range of a cannonball fired horizontally from a cliff is equal to the height of the cliff. What is the direction of the velocity vector of the projectile as it strikes the ground? (Ignore any effects due to air resistance.) ° (below the horizontal)

    asked by Anonymous on December 3, 2014
  8. physics

    An artillery shell is fired at an angle of 66.1 degrees above the horizontal ground with an initial speed of 1650 m/s. The acceleration of gravity is 9.8 m/s2 . Find the total time of flight of the shell,neglecting air resistance.

    asked by Anonymous on September 12, 2012
  9. physics

    A football kicker can give the ball an initial speed of 30 m/s. What are the (a) least and (b) greatest elevation angles at which he can kick the ball to score a field goal from a point 48 m in front of goalposts whose horizontal bar is 3.44 m above the

    asked by Johnny on February 23, 2011
  10. calculus

    2. A bullet is fired from the ground at an angle of 45o above the horizontal. What initial speed vo must the bullet have in order to hit a point 550 ft high on a tower located 600 ft away (ignoring air resistance)?

    asked by nady on April 11, 2012
  11. math

    2. A bullet is fired from the ground at an angle of 45o above the horizontal. What initial speed vo must the bullet have in order to hit a point 550 ft high on a tower located 600 ft away (ignoring air resistance)?

    asked by nady on April 11, 2012
  12. physics

    A museum curator moves artifacts into place on many different display surfaces. Use the values in Table 4-2 in the textbook to find Fs,max and Fk if you were to move a 157 kg aluminum sculpture across a horizontal steel platform. Fs,max: Fk:

    asked by Zach on November 18, 2010
  13. Physics

    A woman rides a carnival Ferris wheel at radius 20 m, completing 4.8 turns about its horizontal axis every minute. What are (a) the period of the motion, and the magnitude of her centripetal acceleration at (b) the highest point and (c) the lowest point?

    asked by barich on September 25, 2015
  14. physics

    why , regardless of the magnitude of the initial velocity, the maximum horizontal displacement for a projectile occurs when the angle is 45 degrees. Specifically, what happens when the angle is increased or decreased. How would you mention vector

    asked by Madi on February 2, 2016
  15. Physics

    I need help with these two. 1. A horizontal force pulls a 20-kg box across the floor with constant speed. μs is 0.60, how much work does F do in moving the cart 3.0 m? 2. A 400 lb load of bricks is to be lifted to the top of a scaffold 30 feet high. How

    asked by Yurii on October 23, 2015
  16. Mechanics_physics

    A soccer player kicked a ball at an angle of 37 degrees to the horizontal.if the range covered by the ball is 240.3m; calculate (a) The initial velocity of projection ? (b) The time of flight (c) The maximum height attained

    asked by Precious on January 4, 2013
  17. math

    the diagram shows a trapeze in a childrens playground. AC is horizontal bar 1.2m long. BX and DY are vertial posts each 3.4m tall. they are 2.5m apart. AC is suspended by ropes, AB and CD each 2.0m long. Calculate to one decimal place the vertical height

    asked by bob on September 20, 2011
  18. physics

    A car is traveling at 60.6 mph on a horizontal highway. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between road and tires on a rainy day is 0.056, what is the minimum distance in which the car will stop? Answer in units of m.

    asked by loren on November 5, 2016
  19. physics

    a conical pendulum is formed by attaching a 500g ball to a 1m long string then allowing the mass to move in a horizontal circle of radius 20 cm. A) what is the tension of the string? b) what is the balls angular speed in rpm?

    asked by jamieson on November 15, 2009
  20. science

    a truck travels along the horizontal circular curve of radius r=60m with a constant speed v=20m/s. Determine the angular rate of rotation theta of the radial line r and the magnitude of the truck's acceleration.

    asked by sarah on November 3, 2008
  21. math

    PLEASE I NEED HELPPPPP.. i have many exercises like that, just want to know where to start thanks. f(x)= x^3+2x^2-x-2 / x^2+x-6 find: 1. domain 2. symmetry or not 3. determine if f(x)is: a)in lowest trem b)proper/improper 4. x-intercepts, y-intercepts 5.

    asked by leticia on March 1, 2011
  22. physics

    The coefficient of kinetic friction between tires and dry pavement is about 0.80. Assume that while travelling at 27m/s you lock your brakes and as a result the only horizontal force on the car is the frictional one. How many seconds does it take you to

    asked by Dane on November 20, 2014
  23. physics

    A woman rides a carnival Ferris wheel at radius 16 m, completing 4.2 turns about its horizontal axis every minute. What are (a) the period of the motion, and the magnitude of her centripetal acceleration at (b) the highest point and (c) the lowest point?

    asked by Anne on September 19, 2011
  24. physics

    hi, if anyone could give me any sort of help on how to solve this problem i would greatly appreciate it. thank you. A 2.66 kg object placed on a frictionless horizontal table is connected to a string that passes over a pulley and then is fastened to a

    asked by miranda on September 13, 2009
  25. Physics

    A .145kg baseball pitched at 39m/s is hit on a horizontal line drive straight back toward the pitched at 52m/s. If the average force the bat exerts on the ball is 13,200N, how long did the collision last?

    asked by Sarah on May 9, 2012
  26. Physics

    I am trying to help my daughter with this question and don't know how to even begin it. Thank you. A 75 kg baby carriage is pushed along a level sidewalk by exerting a force of 50 N on the handle, which makes an angle of 60o with the horizontal. What is

    asked by Mom on November 8, 2016
  27. physics

    A car is traveling at 60.6 mph on a horizontal highway. The acceleration of gravity is 9.8 m/s2. If the coefficient of friction between road and tires on a rainy day is 0.056, what is the minimum distance in which the car will stop? Answer in units of m. m

    asked by Anonymous on October 14, 2012
  28. Physics

    On August 12, 1987, Alessandro Andrei set a world record in the shot put with a throw of 22.9m. What was the initial speed of the shot if he released it at a height of 2.10m and threw it at an angle of 38 degrees above the horizontal?

    asked by Cassie on August 12, 2015
  29. Physics

    This is an Oscillations question. A horizontal plate is vibrating vertically in simple harmonic motion at a frequency of 20Hz. What is the maximum amplitude of vibration so that a coin of 0.0080kg resting on the plate always remains in contact with it?

    asked by Jade on December 16, 2016
  30. Physics

    Ximena stands near the edge of a cliff 20 ma bove her friend Javier. If she throws a ball to Javier at an angle = 30 below the horizontal and it reaches him in 1.0 s, ignoring air resistance, what was the magnitude of the sandwich's initial velocity? (use

    asked by Tom on September 24, 2016
  31. Psychics

    A drag racing car starting from a standstill can reach a speed of 320 km/h in 6.50s by exerting an average horizontal force of 1.52x10^4 N on the pavement. If friction equals 5.2x10^3 N, what is the mass of the car?

    asked by Jerry on October 29, 2018
  32. Physics

    Three objects are connected as shown in the figure below. They move along a horizontal, frictionless surface, and are pulled to the right with a force Fext = 1.3 N. With the three mass values given as m1 = 726 g, m2 = 633 g, and m3 = 782 g. Calculate the

    asked by Sam on October 2, 2009
  33. trig HELP

    A barn is 30ft. wide by 60ft long; the rafters make an angle of 40degrees with the horizontal. Find the area of each of the two gable ends and the area of the roof. Please Include Solution And If Possible An Illustration. Thank You In Advance :)

    asked by Amber on July 5, 2012
  34. mth

    PLEASE I NEED HELPPPPP.. i have many exercises like that, just want to know where to start thanks. f(x)= x^3+2x^2-x-2 / x^2+x-6 find: 1. domain 2. symmetry or not 3. determine if f(x)is: a)in lowest trem b)proper/improper 4. x-intercepts, y-intercepts 5.

    asked by leticia on March 1, 2011
  35. Physics

    Three objects are connected as shown in the figure below. They move along a horizontal, frictionless surface, and are pulled to the right with a force Fext = 2.4 N. With the three mass values given as m1 = 604 g, m2 = 744 g, and m3 = 693 g. Calculate the

    asked by Hannah on October 6, 2009
  36. physics

    A body is projected at an angle of 30degree to the horizontal with a velocity of 150metre per seconds.Calculate the time it takes to reach the greatest height,take g=10metre per seconds square and neglect air resistance.

    asked by scott on June 18, 2015
  37. Physics

    A football kicker can give the ball an initial speed of 31 m/s. What are the (a) least and (b) greatest elevation angles at which he can kick the ball to score a field goal from a point 49 m in front of goalposts whose horizontal bar is 3.44 m above the

    asked by Antonio on September 13, 2010
  38. Math

    1.Which of the following is true about the bisectors of a segment in a plane? A) Every segment has exactly one bisector. B) Every segment has exactly two bisectors. C) Every segment has 10 bisectors. D) Every segment has infinitely many bisectors. Is the

    asked by Tim on September 21, 2015
  39. Math: Please help

    Which of the following must be true about a the bisectors of a segment in a plane? A. Every segment has exactly one bisector. B. Every segment has exactly two bisectors.****** C. Every segment has 10 bisectors. D. Every segment has infinitely many

    asked by Cassie on August 20, 2014
  40. Chemistry

    A mixture of chromium and zinc weighing .362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted 225 mL of dry hydrogen gas was collected at 27 C and 750 torr. Determine the mass percent Zn in the metal sample.

    asked by Kyle on March 4, 2007
  41. physics

    A plane flies from base camp to Lake A, 220 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to

    asked by carlton on September 12, 2012
  42. Physics

    A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 6.0 m, y = 3.0 m, and has velocity v = 4.0 m/s + -1.0 m/s . The acceleration is given by the vector a = 4.0 m/s2 + 0 m/s2 . (a) Find the velocity vector at t

    asked by Anonymous on July 7, 2015
  43. Physics

    The pilot of a small plane finds that the airport where he intended to land is fogged in. He flies 55 miles west to another airport to find that conditions there are too icy for him to land. He flies 25 miles at 15 degrees east of south and is finally able

    asked by Dakota S on September 12, 2010
  44. physics

    A satellite with a mass of ms = 7.00 × 103 kg is in a planet's equatorial plane in a circular "synchronous" orbit. This means that an observer at the equator will see the satellite being stationary overhead (see figure below). The planet has mass mp =

    asked by Anonymous on October 17, 2013
  45. maths

    Let ABC be a triangle in the plane. Find circles C0;C1; : : : ;C6 such that Cj has exactly j points in common with the boundary of ABC (this \boundary" consists of the line segments AB, BC, CA). Is it possible to find a circle C7 with 7 points in common

    asked by jenny on October 10, 2012
  46. 12th grade

    prove that normal to plane containing 3 points whose position vectors are a vector,b vector,c vectorlies in direction addition of cross product of vectors b and c and cross product of vectors c and a and cross product of vectors a and b

    asked by parth on September 22, 2009
  47. APCalculus

    For the function y=4-2x^2+1/6x^4 find the following: Domain x and y intercepts Vertical asymptotes Horizontal asymptotes Symmetry F'(x) Critical numbers Increasing f(x) Decreasing f(x) Extrema F"(x) Possible points of inflection Concave up Concave down

    asked by Sarah on December 8, 2014
  48. Physics

    In a steady flow system crude oil of density 1200 kgm-3 flows at the rate of 275kg/min through a horizontal pipeline of varying cross-sectionional areas 0.068 and 0.083m2 respectively. Determine the absolute pressure between X and Y.

    asked by Rooney on May 13, 2018
  49. calculus

    Given: a)lim f(x) = 10 x----> 2+ b)lim f(x) = 10 x----> 2- c)lim f(x) = 10 x----> 2 d) f(2)= 10. What type of function is this limit? Would it be a horizontal line?

    asked by rod on April 23, 2018
  50. specific heat of Aluminom

    What is the specific heat of Aluminom if it takes 1100 calories to take the temp. from 10 degrees C to 80 degrees C and the block of Aluminon has a mass of 60 grams? q = massAl x specific heat x (Tf-Ti) q is 1100 calories Tf is final T Ti is initial T mass

    asked by brandi on December 19, 2006
  51. physics

    A horizontal force of magnitude 22 N is applied to a 3.0 kg book as the book slides a distance d = 0.5 m up a frictionless ramp at angle è = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?

    asked by dawn on February 13, 2008
  52. physics

    A horse pulls a cart with a force of 40lb at an angle of 30 degrees above the horizontal and moves along at a speed of 6mi/hr. A) how much work does the force do in 10 min? B) What is the average power (in horsepower) of the force?

    asked by James on July 18, 2010
  53. physic

    Water flows through a 4.0-cm-diameler horizontal pipe ata speed uf 1.3 m/s. The pipe then narrows down to a diameter of 2.0 cm. Ignoring viscosity, what is the pressure difference between the wide and narrow sections of the pipe

    asked by john on November 19, 2009
  54. Physics

    A horizontal force with a magnitude of 3.0 newtons applied to a 7.0 kilogram mass moves the mass horizontally a distance of 2.0 meters. Determine the work done against gravity in moving the mass. What is the formula that you use?

    asked by Carlos on January 16, 2012
  55. Physics

    A skier squats low and races down a 14 degree ski slope. During a 5 s interval, the skier accelerates at 4.2 m/s2. What is the horizontal component of the skier’s acceleration (perpendicular to the direction of free fall)?

    asked by Anonymous on November 25, 2012
  56. Physics

    a horizontal force of magnitude 20.0 N is applied to a 3.05 kg book as the book slides a distance d = 0.87 m up a frictionless ramp at angle θ = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?

    asked by tom on March 2, 2014
  57. Physics

    a horizontal force of magnitude 18.0 N is applied to a 3.07 kg book as the book slides a distance d = 0.34 m up a frictionless ramp at angle è = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?

    asked by Emily on October 9, 2012
  58. physics

    A stone tied to the end of a string, 80 cm long, is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 seconds what is the magnitude and direction of the acceleration of the stone?

    asked by stacy on November 16, 2010
  59. physics

    A cannon fires a shell at an angle of 20º to the horizontal. The shell reaches a range of 436 meters, landing at the same elevation as the starting point. What was the initial velocity of the shell

    asked by Anonymous on October 22, 2011
  60. Physics

    A projectile is launched horizontally from a cliff and has initial speed 30 m/s. The projectile will hit the ground 10 s later. What is the horizontal component of the projectile's velocity 5.0 s after launch. Assume air resistance is negligible.

    asked by Mary on October 14, 2016
  61. physics steve or damon help!!!!

    A stone is thrown horizontally from the top of a vertical wall with a velocity of 15m/s hit the horizontal ground at a point 45m from the base of the wall.calculate the height of the wall g=10

    asked by david on March 28, 2016
  62. physics

    Three carts of masses 5 kg, 12 kg, and 3 kg move on a frictionless horizontal track with speeds of 5 m/s, 8 m/s, and 4 m/s, as shown in figure. The carts stick together after colliding. 5 kg 12 kg 3 kg 5 m/s 8 m/s 4 m/s Find the final velocity of the

    asked by ntirandekura on February 1, 2012
  63. physics

    A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.6 m/s and her body makes an angle of 84 degrees with respect to the horizontal surface of the water .

    asked by na on September 11, 2010
  64. precal : conics

    a parkway 80 ft. wide is spanned by a parabolic arc 100 ft. long along the horizontal, if the parkway is in the center, how high must the vertex of the arch be in order to give a minimum clearance of 20 over the parkway?

    asked by rhinechilde on November 15, 2015
  65. Physics

    A stone is projected horizontally from the top a tower with a speed of 5m/s.It lands on the ground level at a horizontal distance of 20m from the foot of the tower.Calculate the height of the tower.(g=10m/s2)

    asked by Lawson on June 19, 2016
  66. physics

    You are skiing and have a mass of 47 kg and are on a slope making an angle of 37 degrees above horizontal. The coefficient of kinetic friction between the skis and the snow is 0.18. What is the amount of force pulling you down the slope? What is your

    asked by Anna on February 22, 2015
  67. physics

    A student swings a 3.5g rubber stopper in a horizontal circle over her head.The length of the string is 0.6m.The stopper is observed to make 10 revolutions in 11.7seconds.What is the tangential velocity of the stopper at any time,t.

    asked by lovemore on April 4, 2012
  68. Calc again sorry

    4) The graph of y = (x)/(1+25x^2) for x is greater than or equal to 0 has a horizontal tangent at x = what. So what I did was find the first derivative. I did the quotient rule and ended up with x50x - 1+25x^2 --------------- (1+25x^2)^2 I equated that

    asked by Samantha on November 5, 2008
  69. physics

    A loaded sled is pulled by means of a rope that makes an angle of 45.0° with the horizontal. If the mass of the sled is 60.0 kg and the coefficient of friction is 0.020, how much work is done in pulling the sled for a distance of 1.000 km?

    asked by NG on November 29, 2013
  70. TOm

    Hello, this is the last question that I can't seem to or be able to solve: 1. Jenny (75 kg) goes on a ski trip. She goes down a slope that's inclined at 15*. The drag coefficient of Jenny is 0.300, the surface of contact with air is 0.750 m^2 and the air

    asked by Physics on January 27, 2012
  71. Heat Transfer

    A fin 30 cm long & 10mm diameters throughout is made of steel alloy of thermal conductivity 43 W/m-deg. the fin attached to a plane heated wall at 200 deg.C temp. extends into surroundings at 25 deg.C.& Unit surface conductance of 120W/m^2-deg. Workout the

    asked by Guru on August 1, 2012
  72. Calc

    1. Differentiae each function a) Y=-3x^2+5x-4 b) F(x) = 6/x-3/x^2 c) F(x)=(3x^2-4x)(x^3+1) 2. Determine the equation of the tangent line to the curve y=2x^2-1 at the point where x=-2 3. Evaluate, rounding to two decimal places, If necessary a) In 5 b) b)

    asked by Bobby on June 11, 2012
  73. Heat Transfer

    A fin 30 cm long & 10mm diameters throughout is made of steel alloy of thermal conductivity 43 W/m-deg. the fin attached to a plane heated wall at 200 deg.C temp. extends into surroundings at 25 deg.C.& Unit surface conductance of 120W/m^2-deg. Workout the

    asked by Rafeeq on August 1, 2012
  74. math (altitude)

    An airplane flying at an altitude of 31,000 feet descends at a rate of 1,200 feet per minute. If the plane descends for 15 minutes, what would its altitude be in feet?: * 13,000 23,000 18,000 21,000

    asked by anonymous on September 22, 2007
  75. heat transfer

    a plane wall of thickness 10 cm and thermal conductivity of 25w/m degree centigrade has a volumetric heat generation of.3*10 to the power 16w/mque .the wall is insulated on one side & other side is exposed to fluid at90 degree temperature . determine

    asked by sushil on July 24, 2013
  76. physics

    A small source O of electromagnetic waves is placed some distance from a plane metal reflector M. A receiver R, moving between O and M along the line normal to the reflector, detects successive maximum and minimum readings on the meter joined to it. (a)

    asked by Edwin on March 26, 2010
  77. Physics please check repost

    The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 4.0 x 10^5 Pa, and the horizontal divisions represent 4.5 x 10^-3 m3. The diagram is a upright rectangle divided into small squares

    asked by Mary on April 23, 2007
  78. Algebra

    A flight from a to B is against the wind and takes five hours return flight with wind takes 4.5 hours of the wind speed is 50 mph find the speed of the plane in still air

    asked by Jason on September 20, 2016
  79. Physics Classical Mechanics

    You are holding a ball of mass m2 in your hand. In this problem you will solve for the upward force T⃗ that the tendon of your biceps muscle exerts to keep the forearm horizontal and the downward force F⃗ that the upper arm exerts on the forearm at the

    asked by A on November 26, 2013
  80. Math

    Barb is going to cover a rectangular area 8 feet by 10 feet with rectangular paving blocks that are 4 inches by 8 inches by 2 inches to make a flat patio. What is the minimum number of paving blocks she will need if all the paving blocks will face the same

    asked by Anonymous on May 2, 2015
  81. Physics

    You want to push a 66-kg box up a 30° ramp. The coefficient of kinetic friction between the ramp and the box is 0.35. With what magnitude force parallel to the ramp should you push on the box so that it moves up the ramp at a constant speed? N Physics -

    asked by I dont know y no one is helping me :/ on February 16, 2012
  82. Physics

    You want to push a 66-kg box up a 30° ramp. The coefficient of kinetic friction between the ramp and the box is 0.35. With what magnitude force parallel to the ramp should you push on the box so that it moves up the ramp at a constant speed? N Physics -

    asked by Anonymous on February 16, 2012
  83. Physics

    Suppose the height of the ramp is h1= 0.3 m, and the foot of the ramp is horizontal, and is h2= 1.00 m above the floor. What will be the horizontal distance traveled by the following four objects before they hit the floor? Assume that R= 12.7 mm in each

    asked by Anonymous on February 11, 2016
  84. calculas 1

    A child places n cubic building blocks in a row to form the base of a triangular design (see figure). Each successive row contains two fewer blocks than the preceding row. Find a formula for the number of blocks N used in the design. (Hint: The number of

    asked by Sam on May 7, 2016
  85. physics

    A scuba diver must decompress after a deep dive to allow excess nitrogen to exit safely from his bloodstream. The length of time required for decompression depends on the total change in pressure that the diver experienced. Find this total change in

    asked by phillip on November 27, 2012
  86. physics.

    A 20.0 kg cannon ball is fired from a cannnon with muzzle speed of 1000 m/s at an angle of 37.0 with the horizontal. A second ball is fired at an angle of 90.0. Use the conservation of energy principle to find a] the maximum height reached by each ball and

    asked by Jean on March 15, 2007
  87. physics

    A long, vertical, straight wire carries a current I going upwards. The wire is perpendicular to the plane of a circular metal loop and passes through the center of the loop. The loop is allowed to fall and maintains its orientation with respect to the

    asked by josh on July 28, 2010
  88. Trigonometry

    A TREE STANDS ON HORIZONTAL GROUND. THE ANGLE OF ELEVATION OF THE TOP OF THE TREE FROM A POINT 50 m AWAY FROM THE BASE OF THE TREE IS 11.3°. CALCULATE THE HEIGHT OF THE TREE.

    asked by Anonymous on June 16, 2016
  89. algebra

    A mountain drops 90 feet over a horizontal distance of 875 feet. What is the slope of the mountain? Round your answer to two decimal places.

    asked by franklin on November 4, 2010
  90. new mexico

    Kara drew a horizontal dashed line through the middle of a trapezoid parallel to the parallel sides.Did she create a line of symmetry?

    asked by jacob on November 29, 2012
  91. physics

    A projectile is fired off a cliff at an angle of 60 degrees to the horizontal. The height of the cliff is 48 meters and the velocity of the projectile is 80 m/s. Find the range (dx)

    asked by jay on November 2, 2017
  92. physics

    a body is moving with a velocity v over a rough horizontal surface and comes to rest after traversing a distance s then the co-efficient of friction between body and the surface is

    asked by Anonymous on September 28, 2017
  93. Physics

    A soccer ball is kicked with a speed of 9.80 m/s at an angle of 25.0 degrees above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air?

    asked by Abby on February 16, 2010
  94. physics

    Suppose you moved a box across a rough horizontal surface with a 50 N force over a displacement of 10 m. If the frictional force at the interface was 10 N, how much work was done to the box?

    asked by Mary on July 7, 2015
  95. physics

    A 15.0-kilogram mass is moving at 7.50 meters per second on a horizontal, frictionless surface. What is the total work that must be done on the mass to increase its speed to 11.5 meters per second?

    asked by ashley --- HELP PLEASEE!!! on May 8, 2011
  96. physcis

    a flag pole is 1ooft from an observer who sights the top of the flag pole to be at an angle of 50 degrees from the horizontal. How high is the flagpole

    asked by Casandra on September 23, 2007
  97. Physics

    If an Indian was to drive a 875kg buffalo over the edge of a 33 meter cliff with a horizontal velocity of 8.75 m/s, how far from the base of the cliff would the buffalo land?

    asked by Mackenzie on October 28, 2015
  98. Physics, newtons laws

    A bullet is fired with a certain velocity at an angle above the horizontal at a location where g= 10.0 m/s^2. The initial x any components of its velocity are 86.6 m/s and 50 m/s respectively. How long does it take before the bullet hits the ground?

    asked by Naf on October 29, 2012
  99. physics

    A ball moving at a speed of 2.0 m/s rolls off a horizontal table. If the table is 1.2 m high, how far does the ball travel horizontally in m when it strikes the floor

    asked by flip on September 25, 2012
  100. Physics

    A particle is projected at 10ms^-1 from a height of 45m. Calculate the horizontal distance covered by the particle before reaching the ground(g=10ms^-2)

    asked by Anonymous on February 8, 2018