1. college physics

    loft the ball with an initial speed of 15.0 m/s at an angle of 50.0° the horizontal. At this instant your opponent is 10.0 m away from the ball. He begins moving away from you 0.38 s later, hoping to reach the ball and hit it back at the moment that it is

    asked by jc on February 23, 2011
  2. geo

    George and phil were playing with their fish tank again. they had a difficult time keeping their fish tank is 100 cm long, 60 cm wide and 40 cm high. they tilted the tank resting on a 60 cm edge, with the water level reaching the midpoint of the base. when

    asked by Jen on December 7, 2006
  3. math

    A batsman hits a cricket ball 'off his toes' towards a fieldsman who is 65 m away. The ball reaches a maximum height of 4.9 m and the horizontal compoenent of its velocity is 28 m/s. Find the constant speed with which the fieldsman must run forward,

    asked by candice on July 15, 2012
  4. Math

    A batsman hits a cricket ball 'off his toes' towards a fieldsman who is 65 m away. The ball reaches a maximum height of 4.9 m and the horizontal compoenent of its velocity is 28 m/s. Find the constant speed with which the fieldsman must run forward,

    asked by Candice on July 14, 2012
  5. physics

    A boulder rolls off a cliff that is 20 m above the surface of a lake with an initially horizontal speed v0. What minimum initial speed must it have to land on the plain? Hint: it must just avoid striking the dam which is 100 m away from the base of the

    asked by Anonymous on October 12, 2010
  6. Physics

    A cannon is mounted on a truck that moves forward at a speed of 5 m/s. The operator wants to launch a ball from a cannon so the ball goes as far as possible before hitting the level surface. The muzzle velocity of the cannon is 50 m/s. What angle from the

    asked by Brian on February 17, 2013
  7. Math

    Centerville is the headquarters of Greedy Cablevision Inc. The cable company is about to expand service to two nearby towns, Springfield and Shelbyville. There needs to be cable connecting Centerville to both towns. Centerville is located at (10,0) in the

    asked by Lukas on December 12, 2014
  8. Math

    All rational functions can be expressed as f(x) = p(x)/q(x), where p and q are __________ functions and q(x) ≠ 0. A. horizontal asymptotes B. polynomial C. vertical asymptotes D. slant asymptotes Is the answer D. vertical asymptotes?

    asked by Sarah on October 19, 2014
  9. Science

    iron cube of side 10 cm is kept on a horizontal table . If the density of iron cube is 8000 kg /m cube , find the pressure on the portion of the table where the cube is kept?

    asked by Sharma on February 25, 2012
  10. Physics

    A soccer ball is kicked with an initial horizontal velocity of 19.0 m/s and an initial vertical velocity of 14.0 m/s 6) How high above the ground is the ball 1.1 seconds after it is kicked?

    asked by Jake on September 10, 2012
  11. 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.

    asked by andrea on January 25, 2011
  12. physics

    "A 25-N crate is held at rest on a frictionless incline by a force that is parallel to the incline. If the incline is 25◦ above the horizontal the magnitude of the normal force of the incline on the crate is: "?

    asked by amgad on October 14, 2017
  13. Physics

    A ball is rolled off a horizontal roof at 6m/sec , after leaving the roof how long it will take to reach a speed of 10 m/sec? A. 0.20 seconds B. 0.81 seconds C. 1.8 seconds D. 2.5 seconds

    asked by SAGAR on July 5, 2016
  14. Physics

    A baseball is hit with an initial speed of 42 m/s at an angle of 30° relative to the x (horizontal) axis.(a) Find the speed of the ball at t = 3.4 s. (b) What angle does make with the x axis at this moment? (c) While the ball is in the air, at what value

    asked by Anne on October 20, 2012
  15. Physics

    A rifle that has been "sighted in" for a 94.6-meter target. If the muzzle speed of the bullet is v0 = 429 m/s, what are the two possible angles è1 and è2 between the rifle barrel and the horizontal such that the bullet will hit the target? One of these

    asked by help please on September 22, 2013
  16. Physics

    Michelle pulls a 14.5 kg wheeled cart with a rope along a flat road. The rope makes a 28.0 degree angle with the horizontal. If the tension in the rope is 350 N and she pulls the cart 56.7m how much work does Michelle do?

    asked by Becky on March 21, 2012
  17. calculus question ?

    I just can't wrap my head around this. I don't know if this is true I just came to conclusion with this if the limit of x--> +/-inf = L (if the limit of x going to pos/neg infinity gives you a number L) does that mean that L is a horizontal asymptote ? if

    asked by AMELIA on May 14, 2016
  18. physics

    A boy 14.0m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the instant the ball is thrown. If the boy throws the ball upward at 50.0∘ above the horizontal, at 8.00m/s .

    asked by Anonymous on September 18, 2014
  19. physics

    To push a 16 kg crate up a frictionless incline, angled at 32° to the horizontal, a worker exerts a force of 108.0 N, parallel to the incline. As the crate slides 1.50 m, how much work is done on the crate by the worker's applied force?

    asked by Abby on October 24, 2014
  20. Physics-circular force

    A child on a merry-go-round is moving with a speed of 1.40 m/s when 1.18 m from the center of the merry-go-round. (a) Calculate the centripetal acceleration of the child. (and I got 1.08) (b) Calculate the net horizontal force exerted on the child (mass =

    asked by Anonymous on October 28, 2009
  21. Physics

    A child on a merry-go-round is moving with a speed of 1.40 m/s when 1.18 m from the center of the merry-go-round. (a) Calculate the centripetal acceleration of the child. (b) Calculate the net horizontal force exerted on the child (mass = 25.0 kg).

    asked by Anonymous on October 27, 2009
  22. College Physics

    A uniform plank of length L leans against a vertical wall, its head a distance h above the horizontal ground. If we let go of the plank from rest, how far above the ground is the head of the plank the moment it loses contact with the wall?

    asked by Grimider on February 10, 2011
  23. physics

    A 14.5 kg toy car is driving around a horizontal circular track with a period of 8.0 seconds. The radius of the circular track is 1.1 meters. What is the force of friction in Newtons between the car and the track that is necessary for the car to remain on

    asked by Anonymous on May 7, 2018
  24. Physics

    A car is traveling around a horizontal circular track with radius r = 270 m as shown. It takes the car t = 66 s to go around the track once. The angle θA = 19° above the x axis, and the angle θB = 56° below the x axis. 1What is the magnitude of the

    asked by Harman Preet on October 13, 2015
  25. physics

    Water flows at 0.58 m/s through a pipe 11 cm in diameter when the pressure is 450,000 Pa. Determine the water velocity & the pressure in the pipe if it shrinks down to 5 cm in diameter. You can assume that the pipe is horizontal & ρwater = 1000 kg/m3.

    asked by help! on April 1, 2018
  26. Physics

    A uniform plank of length L leans against a vertical wall, its head a distance h above the horizontal ground. If we let go of the plank from rest, how far above the ground is the head of the plank the moment it loses contact with the wall?

    asked by OPTIPLEX on February 11, 2011
  27. MATH!!

    the ramp shown below is used to move crates of oranges to loading docks at diffrent heights.when the horizontal distance ab is 15 feet the height of the loading dock,bc,is 3 feet.what is the height of the loading dock de

    asked by Makayla<3 on January 27, 2015
  28. phy

    Snowballs are thrown with a speed of 11 m/s from a roof 6.0 m above the ground. Snowball A is thrown straight downward; snowball B is thrown in a direction 20^\circ above the horizontal. 1-Find the direction of motion of the two snowballs just before they

    asked by pop on July 9, 2011
  29. Physics

    When a sandbag is dropped from a balloon hovering 1.3 m above the ground, it hist the ground at 5.0 ms⁻¹. On another occasion, the sandbag is released from the balloon which is rising at 7.0 ms⁻¹ when 1.3 m above the ground. There is also a

    asked by Kent on October 30, 2017
  30. physics

    A flat horizontal surface with an area of 650 cm2 is inside a uniform electric field of 2.99×104 N/C. The angle between the area vector and the electric field is 14.8°. What is the electric flux through the surface?

    asked by Ana on January 30, 2011
  31. science

    A tractor pulls a tree trunk across a horizontal piece of ground.if the force in the chain is 3000N and the chain forms an angle of 30˚ with the ground,culculate the force with which the tree I'd pulled across the ground

    asked by refilwe on February 24, 2014
  32. Math

    Here is the question: The mortgage department of the company is selling two model homes that are located on the same block. The square footage, as well as the type of model, determines the cost of these homes. e) The second home has 1000 square feet less

    asked by H on December 17, 2009
  33. math

    margarit liked to balance things. she balanced 3 pencil sharpeners and 2 one gram blocks with a 100 gram weight and another one gram block. she let x stand for the weight of one pencil sharpener and she claimed that x=30grams. was she correct if not how

    asked by ciera on January 23, 2007
  34. physics

    A plane leaves Seattle, flies 84.0{\rm mi} at 21.0^\circ north of east, and then changes direction to 52.0^\circ south of east. After flying at 120{\rm mi} in this new direction, the pilot must make an emergency landing on a field. The Seattle airport

    asked by Julio on August 9, 2012
  35. Physics

    A science student riding on a flatcar of a train moving at a constant speed of a 9.70 m/s throws a ball toward the caboose along a path that the student judges as making an initial angle of 45.0◦ with the horizontal. The teacher, who is standing on the

    asked by Big Poppa Smurf on November 29, 2012
  36. Fluid Mechanics

    Water at 600F flows steadily through a horizontal circular divergent duct and discharges into the atmosphere as shown. A manometer with a fluid of SG=2.0 is placed between the two cross-sections with diameters D1 = 0.5 ft and D2 = 0.7 ft. Assuming inviscid

    asked by Bob on June 11, 2012
  37. PHYSICS

    Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with this. All I need is a formula, please. :)Thank you! Here it is: A skier with a

    asked by Anna on March 14, 2013
  38. Physics

    Two infinitely long slits, S1 and S2, each of width d=0.1 cm are used to prepare a box-shaped electron beam with energy E=400 eV. At what distance x from the slit S2 will the thickness of this electron beam double due to Coulomb's repulsion? The linear

    asked by Anna on April 4, 2010
  39. phy

    A young man is throwing rocks gently up to his girlfriend's window, and he wants the rocks to hit the window moving only with a horizontal component of velocity. He is standing at the edge of a flower bed h = 7.9 m below her window and d = 9.0 m from the

    asked by walter on October 15, 2015
  40. Physics

    By trial and error, a frog learns that it can leap a maximum horizontal distance of 1.26 m. If, in the course of an hour, the frog spends 27.5 % of the time resting and 72.5 % of the time performing identical jumps of that maximum length, in a straight

    asked by Brittany on January 29, 2015
  41. Math

    This question is about equations reducible to quadratics: Gerald hits his golf ball down the fairway. The path the ball followed was parabolic in shape with the relationship: h=2d-1/30d^2 where h is the height above the ground of the golf ball when it is a

    asked by CrissyXD on August 17, 2011
  42. Calculus

    A hot air balloon is 150 ft above the ground when a motorcycle passes beneath it (traveling in a striaght line on a horizontal road) going 58 ft/sec. If the balloon is rising vertically at a rate of 10 ft/sec, what is the rate of change of the distance

    asked by Linda on April 8, 2015
  43. Pre-Calculus

    1) Use a graphing utility to obtain the graph of the function. Give the domain of the function and identify any vertical or horizontal asymptotes. x+4/ x^2+x-6. 2) Use a graphing utility to graph the function and determine the x-intercepts and B. set y=0

    asked by Addy on April 8, 2011
  44. calc(steps and explanation also)

    A hot air balloon is 150 ft above the ground when a motorcycle passes beneath it (traveling in a striaght line on a horizontal road) going 58 ft/sec. If the balloon is rising vertically at a rate of 10 ft/sec, what is the rate of change of the distance

    asked by Linda on April 9, 2015
  45. phy

    A stone is thrown upward from the edge of a cliff overlooking the ocean. The initial speed of the stone is 20m/s, and it's thrown up at an angel of 30 degrees with respect to the horizontal. the cliff is 45m above the ocean surface. How long is the stone

    asked by nicky on October 12, 2012
  46. Physics

    A quarterback throws a football toward a receiver with an initial speed of 18 m/s, at an angle of 29 degrees above the horizontal. At that instant, the receiver is 19 m from the quarterback. With what constant speed should the receiver run in order to

    asked by Gaby on November 7, 2011
  47. physics

    A coin is placed 26 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 120 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by john on September 25, 2012
  48. College Physics

    1. A certain projectile is launched with an initial speed v0. At its highest point its speed is v0/6. What was the launch angle? 2. The "hang time" of a punt is measured to be 3.50 s. If the ball was kicked at an angle of 61.0° above the horizontal and

    asked by Lizz on October 3, 2012
  49. Physics

    Dad (M = 84kg) is pushing his son (m = 14kg) in a box (negligible mass) across the living room rug at a constant velocity. He is pushing on the box with a force of 200N directed at 37° below the horizontal. The normal force exerted by the rug on the box

    asked by Michael on November 4, 2012
  50. physics

    1. A certain projectile is launched with an initial speed v0. At its highest point its speed is v0/6. What was the launch angle? 2. The "hang time" of a punt is measured to be 3.50 s. If the ball was kicked at an angle of 61.0° above the horizontal and

    asked by Franklin on October 3, 2012
  51. Physics

    a 60-kg ice skater holds up a large sheet of cardboard that can catch the wind and drive her (frictionlessly) across the ice. while she's moving at 0.5m/s, a wind that is constant and horizontal for 5.0s exerts a forward force on the cardboard of 2.0 n.

    asked by Jocelyne on November 30, 2016
  52. Physics

    A 50.0-kg boy runs on a horizontal surface at a speed of 10.0 m/s and jumps onto a cart just before reaching a slope as shown in the figure. The cart is initially at rest. If the mass of the cart is 150 kg, what is the maximum height h the boy/cart will

    asked by Robin on May 24, 2016
  53. Physics

    During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.86 km/s at an initial inclination of 52.2◦ to the horizontal. The acceleration of gravity is 9.8 m/s^2. a. How far away did the

    asked by Peyton on September 15, 2016
  54. Physics

    A place kicker must kick a football from a point 31.2 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ground with a speed of 21.3 m/s at an angle of 53° to the horizontal. By

    asked by Anon on October 26, 2015
  55. Physics

    A place kicker must kick a football from a point 31.2 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ground with a speed of 21.3 m/s at an angle of 53° to the horizontal. By

    asked by Anonymous on October 26, 2015
  56. physics

    A demonstration gyroscope consists of a uniform disk with a 37-cm radius, mounted at the midpoint of a light 61-cm axle. The axle is supported at one end while in a horizontal position. How fast is the gyroscope precessing, in units of rad/s, if the disk

    asked by zack on March 26, 2011
  57. Chem=continued

    I'm currently working on a lab in which I have to make the solution boil at 245 degrees F. The solution will be a mix of ethylene glycol and I have to caluculate the volumes of water and solute needed to make the solution. here's my work so far. X= mL

    asked by Jonathan on February 11, 2008
  58. Chemistry

    I just wanted to see if my answers made sense. 1. What effect would each of the following have on your calculated value of Kf (too high, too low, or no effect)? In each case explain your answer. a) There was a small bubble in the thermometer, causing all

    asked by Jason on June 2, 2013
  59. economics

    Hey can someone tell me how to graph this in excel please. Thanks. Produce a chart in Excel showing TC and TR with Q on the horizontal axis. Have Q go from 0 to 15,000 units. Produce a second chart showing MC and MR with Q again on the horizontal axis.

    asked by Alexis on September 16, 2010
  60. College Economics

    Hey can someone tell me how to graph this in excel please. Thanks. Produce a chart in Excel showing TC and TR with Q on the horizontal axis. Have Q go from 0 to 15,000 units. Produce a second chart showing MC and MR with Q again on the horizontal axis.

    asked by Alexis on September 16, 2010
  61. intro chem HELp please

    1. Zinc is often used to calibrate calorimeters because it undergoes a very sharp phase transition from the solid to the liquid at 419.5oC. Calculate the enthalpy change when 5 g of zinc metal is heated from 100oC to the point where the entire sample is

    asked by John on November 5, 2010
  62. Physics

    After delivering his toys in the usual manner, Santa decides to have some fun and slide down an icy roof. The roof is 7 m in length and makes an angle of 41° with the horizontal. He starts from rest at the top of the roof and accelerates at the rate of

    asked by Tina on May 25, 2012
  63. physics 111

    The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a cylindrical tube 58 ft long with a radius of 29 ft (see figure). If a rider sits in a chair at the end of one arm facing the center, how many revolutions per minute would

    asked by Blake on November 7, 2010
  64. Physics

    A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls

    asked by Jamie on January 29, 2007
  65. Physics... Please help me

    A shell is shot with an inital velocity of 20m/s at an angle 60 degrees with the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment whose speed is immediately after the explosion zero falls

    asked by Brian on January 30, 2007
  66. physics

    A car starts from rest and accelerates uniformly along a straight horizontal road at 3 metres second squeared for 4 seconds,after which it continues with a constant velocity for a further 6 seconds.CALCULATE THE MAGNITUDE OF THE MAXIMUM VELOCITY OF THE

    asked by Anonymous on September 3, 2011
  67. english

    Word bank: adverse arid assailant billow confront constrain contemporary depict disinterested encompass groundless hypocrite incomprehensible manipulate maximum mimic ruffle serene sheepish stamina Since Tom is both smart and disinterested I think he is

    asked by Jerald on September 19, 2012
  68. physics

    Consider the process of charging a parallel plate capacitor with circular plates of radius R=5 cm separated by a distance d=0.2 cm. At some time t1, the capacitor is being charged with a current I=0.075 A. Consider a point P on the plane which is equally

    asked by dd on April 12, 2013
  69. physics

    In late 2001, steve Fossett tried to fly a balloon nonstop around the world . why on his attempted circumnavigation of the globe did Steve attempted to travel at an altitude of approximately 10000 m? That is a typical stratosphere flight altitude, where

    asked by Emma on June 16, 2007
  70. Physics

    While Driving Around A Curve Of 200 M Radius, You Notice That The fuzzy dice Hanging From The Rear-view Mirror Hangs At An Angle Of 15 Degree To The Vertical. 1.) What is the force diagram for the dice? 2.) What are the equations of motion in the

    asked by Bob on June 11, 2013
  71. Physics

    An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Write the equation for centripetal force, and substitute the values T and L appropriately. Then with a bit

    asked by James on March 20, 2014
  72. science- here is the worksheet someone help me

    Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to

    asked by Anonymous on October 5, 2008
  73. physics

    Two workers are sliding 330 kg crate across the floor. One worker pushes forward on the crate with a force of 410 N while the other pulls in the same direction with a force of 240 N using a rope connected to the crate. Both forces are horizontal, and the

    asked by yahya on November 6, 2015
  74. Physics

    Two workers are sliding 310kg crate across the floor. One worker pushes forward on the crate with a force of 440N while the other pulls in the same direction with a force of 230N using a rope connected to the crate. Both forces are horizontal, and the

    asked by omar on November 21, 2014
  75. physics

    A baseball pitcher throws a baseball horizontally at a linear speed of 50.6 m/s. Before being caught, the baseball travels a horizontal distance of 24.9 m and rotates through an angle of 54.5 rad. The baseball has a radius of 3.43 cm and is rotating about

    asked by Anonymous on June 23, 2014
  76. Physics

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.40 m/s at an angle of 21.0° below the horizontal. It strikes the ground 6.00 s later. (a) How far horizontally from the base of the building does the

    asked by Emily on February 26, 2017
  77. physic

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.50 m/s at an angle of 15.0° below the horizontal. It strikes the ground 3.00 s later. (a) How far horizontally from the base of the building does the

    asked by mark on February 3, 2016
  78. physics

    A)A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.15 m/s at an angle of 19.0o below the horizontal. It strikes the ground 2.50 s later. How far horizontally from the base of the building does the ball

    asked by Teddy on January 30, 2014
  79. Physics

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.15 m/s at an angle of 18.5o below the horizontal. It strikes the ground 3.30 s later. How far horizontally from the base of the building does the ball

    asked by Lance on February 5, 2012
  80. physics

    A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.50 m/s at an angle of 18.0° below the horizontal. It strikes the ground 5.00 s later. (a) How far horizontally from the base of the building does the

    asked by kim on February 5, 2016
  81. Physics

    Question: You have a 4.5 kg lead block at room temperature. Part A: Find the energy required to raise the lead’s temperature to its melting point. Part B: Find the energy required to melt the lead once it’s reached the melting point. I got the answer

    asked by Kaitlyn on April 21, 2017
  82. Physics

    A stone with mass 0.8kg is attached to one end of a string 0.9m long . The string will break if its tension exceeds 600N. The stone is whirled in a horizontal circle ,the other end of the string remains fixed. Find the maximum speed , the stone can attain

    asked by Swagat khanal on February 6, 2017
  83. physics

    using the strap at an angle of 31° above the horizontal, a Grade 12 Physics student, tired from studying, is dragging his 15 kg school bag across the floor at a constant velocity. (a) If the force of tension in the strap is 51 N, what is the normal force

    asked by sylvia on March 5, 2010
  84. Physics

    A construction worker attempts to pull a stake out of the ground by pulling on a rope that is attached to the stake and makes an angle of 60.0 degrees with the horizontal. Then worker exerts a force of 125 newtons on the rope. What is the magnitude of the

    asked by Shayne on November 23, 2010
  85. science

    A 4.50 g mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end of the spring is fixed to a wall. It takes 3.6J of work to compress the spring by 13.0 cm. If the spring is compressed, and the mass is released

    asked by Peaches on February 5, 2015
  86. Physics

    1. To move a large crate across a rough floor, you push on it with a force F at an angle of 21° below the horizontal. The mass of the crate is 32.0 kg. The coefficients of static and kinetic friction are 0.62 and 0.42 respectively. (a) What force F is

    asked by Meder on February 24, 2013
  87. Physics

    A coin is placed 26 CM from the center of a horizontal turnable intially at rest. The turnable begin to ratate. When the speed of coin is 120 CMS rotating at constant rate the coin just begin to slip the acceleration of gravity is 980 CM/S2. What is the

    asked by Ravi on October 31, 2018
  88. Pre-Ap Physics

    During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.65 km/s at an initial inclination of 41.9◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . How far away did the

    asked by Maria on September 24, 2012
  89. science

    A solid sphere of radius r is gently placed on rough horizontal ground with an initial angular speed and no linear velocity if the coefficient of friction is find the time when the slipping stops in addition state the linear velocity and angular velocity

    asked by Prashant Sartale on May 3, 2013
  90. phsics

    A coin with a diameter of 1.9 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 19 rad/s and rolls in a straight line without slipping. The rotation slows with an angular acceleration of magnitude 2.1

    asked by help on September 27, 2010
  91. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  92. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  93. physics

    You push an 20-kg crate up an inclin with an angle of 35 degrees to the horizontal with a force of 260-N. If the crate is moving at a constant velocity: 1. what is the component of the crate's weight parallel to the surface? 2. WHat is the sum of the

    asked by Katherine on November 7, 2010
  94. Physics

    A place kicker must kick a football from a point 29.0 m (= 31.7 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 17.8 m/s at an angle of 41.0o to the horizontal. By how

    asked by Sam on September 10, 2012
  95. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  96. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  97. Physics

    A 0.2 kg baseball located at the top of a building which is 100 m above the ground is thrown with an initial velocity 30 m/s at an angle of 30o above the horizontal. (a) Determine the total energy which the ball will have just after the instant that the

    asked by Aria on June 24, 2012
  98. physics

    A 650g ball on the end of a light rod is rotated in a horizontal circle of 1.2m radius.Calculate the torque needed to keep the ball rotating if the air resistance exerts a force of .02N on the ball. Ignore the moment of inertia and the air resistance of

    asked by Mark on March 27, 2011
  99. physics

    experiencing a constant horizontal 1.10 m/s wind, a hot air balloon ascends from the launch site at a constant vertical speed of 2.70 m/s. at a height of 202 m, the balloonist maintains constant altitude for 10.3 s before releasing a small sandbag. how far

    asked by jerry on December 8, 2016
  100. physics

    You're in an airplane that flies horizontally with speed 830km/h (230m/s ) when an engine falls off. Neglecting air resistance, assume it takes 35s for the engine to hit the ground. Find the height of airplane. Find the horizontal distance that the

    asked by Maria on March 26, 2015