1. Trigonometry

    A golfer hits a ball off of the ground with an angle of elevation of 10 degrees and an initial velocity of 240 feet per second. There is an 80 foot tree 160 yards in front of her. Will she hit the ball over the tree?

    asked by E on April 4, 2015
  2. physics

    A ball is projected horizontally from the top of a building 19.6m high.if the line joining the point of projection to the point where it hits the ground makes an angle of 45° to the horizontal what is the initial velocity of the ball

    asked by abc on July 20, 2015
  3. Physics

    A baseball catcher puts on an exhibition by catching a 0.15-kg ball dropped from a helicopter at a height of 101 m. What is the speed of the ball just before it hits the catcher's glove 1.0 m above the ground? (g = 9.8 m/s2 and ignore air resistance)

    asked by Matthew on November 27, 2010
  4. physics, please help me, this question is hard

    John Stands at the edge of a flat roof of a three story building and throws a 180g ball straight up into the air that reaches a height of 3.0 meters above the roof. ( building is 14 meters high) A. What is the initial speed of the ball? B. How long does it

    asked by andrew on July 5, 2012
  5. Physics

    A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.10 m/s and rebounds with a velocity of -2.00 m/s. The ball remains in contact with

    asked by Cheng on October 7, 2012
  6. physics

    A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.30 m/s and rebounds with a velocity of -1.90 m/s. The ball remains in contact with

    asked by bb on November 11, 2013
  7. Art

    Why do some people feel the wall for peace in Paris is unsightly ?

    asked by Krista on April 11, 2019
  8. ENGLISH

    SENTENCE PATTERN We painted the wall green yesterday

    asked by JFVD on September 19, 2014
  9. math

    how far from the base of a 10ft ladder be placed so that it reaches 8ft up the wall

    asked by latifah on October 21, 2010
  10. social studies

    Who built the Great Wall of China? I think a Qin emperor

    asked by Evelyn on November 30, 2016
  11. maths

    If a 10m ladder stands 1.25m from a wall, what is it's reach?

    asked by Abe on August 25, 2014
  12. physics

    What is the height of 3.0 meter ladder leans against a wall 37 degree.

    asked by Anonymous on January 19, 2011
  13. physics

    Why can't you put your heels firmly against a wall and then bend over without falling?

    asked by Mandy on November 23, 2008
  14. social studies

    how is the Great Wall of China a national symbol today?

    asked by Anonymous on April 18, 2013
  15. art

    The great wall of los angeles. what are the denotative elements of it?

    asked by brookie on April 13, 2008
  16. Physics

    at what velocity would a snowball melt before it hit the wall at 32 degrees?

    asked by brian on September 14, 2010
  17. biology

    how many poeple prefer batteries than plugging a cable on the wall and why?

    asked by Anonymous on December 1, 2011
  18. Physics

    A golfer hits a shot to a green that is elevated 3.10 m above the point where the ball is struck. The ball leaves the club at a speed of 19.4 m/s at an angle of 33.0˚ above the horizontal. It rises to its maximum height and then falls down to the green.

    asked by Tami on October 17, 2014
  19. Physics help

    Are you sure that's how you do #4 because they have 2 different directions. I need physics help. I don't understand how to do these questions. Can someone show me what I should use? and explain. I'll do calculations by myself. A stationary curling stone is

    asked by HENRY - I NEED YOUR HELP? on January 28, 2016
  20. English

    I urgently need you to check these sentences. Thank you very much for helping me. I don't know a few technical terms. 1) I can see two young men who are probably (working??) on the Stock Exchange. The one in the left-hand side of the picture is analyzing

    asked by Henry2 on January 19, 2012
  21. Physics

    Estimate the force a person must exert on a string attached to a 0.160 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.80 revolutions per second. Do not ignore the weight of the ball. In particular,

    asked by Joe on October 31, 2010
  22. PLEASE HELP ME SOLVE !!!!!!!!

    A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction

    asked by Katie on October 6, 2011
  23. physics

    A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction

    asked by Kaleigh on October 6, 2011
  24. Science

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.44 m, and

    asked by Anonymous on September 29, 2016
  25. Quantum Physics

    A particle of mass 2.00×10^−10 kg is confined in a hollow cubical three-dimensional box, each edge of which has a length, 2.00×10^−10 m, and for which the potential energy function is zero inside, and infinite outside, the box. The total energy of

    asked by Anon on April 22, 2018
  26. physics.pls help

    An ice hut used for winter fishing is at rest on a level patch of snow. The mass of the hut is 80kg. A wind exerts a horizontal force of 205N on the hut, and causes it to accelerate. While in motion, the magnitude of the force of friction acting on the hut

    asked by ted on November 17, 2011
  27. physics

    no idea how to do this problem A kid at the junior high cafeteria wants to propel an empty milk carton along a lunch table by hitting it with a 3.0g spit ball. If he wants the speed of the 40g carton just after the spit ball hits it to be 0.30 m/s, at what

    asked by Levin Need help for test! on November 5, 2014
  28. science

    A 2.1kg soccer ball is struck with a 45N force for .3 seconds. What is the Frictional force if the ball rolls for 11 seconds before stopping.

    asked by jenn on November 16, 2015
  29. physics

    A baseball (m = 148 g) approaches a bat horizontally at a speed of 43.8 m/s (98.0 mi/h) and is hit straight back at a speed of 48.4 m/s (108 mi/h). If the ball is in contact with the bat for a time of 1.08 ms, what is the average force exerted on the ball

    asked by tcc on July 25, 2013
  30. Science

    Which of the following forces causes a feather to fall slower then a bowling ball? A.gravity B.rolling friction C.sliding friction D.air resistance

    asked by Winter on February 9, 2017
  31. Physics please help

    A 195.0-N sign is suspended from a horizontal strut of negligible weight. The force exerted on the strut by the wall is horizontal. Draw an FBD to show the forces acting on the strut. (Do this on paper. Your instructor may ask you to turn in this work.)The

    asked by Amy on May 21, 2012
  32. physics

    A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) time needed for ball to

    asked by mark matat on February 16, 2011
  33. Physics

    A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) time needed for ball to

    asked by Anonymous on November 6, 2015
  34. Physics

    A platform that rolls on wheels and has inertia mp is attached to a wall by a horizontal spring of spring constant k. A load of inertia ml sits on the platform, and the coefficient of static friction between platform and load is μs. If you pull the

    asked by Omar Wilson on November 2, 2017
  35. physics

    A tennis ball (m  57 g) is projected vertically with an initial speed of 8.8 m/s. (a) If the ball rises to a maximum height of 3.7 m, how much kinetic energy was dissipated by the drag force of air resistance? (b) How much higher would the ball have gone

    asked by bee-z on October 24, 2012
  36. physics

    When a 58g tennis ball is served, it accelerates from rest to a speed of 45m/s. The impact with the racket gives the ball a constant acceleration over a distance of 44cm. What is the magnitude of the net force acting on the ball?

    asked by Natasha on February 12, 2012
  37. physics

    in a baseball game a 0.2 kg ball moving at 12 m/s is hit by a bat. after the impact the ball moves in the opposite direction with a velocity of 18 m/s. if the force exerted on the ball of the batter is 670 N. how long is the time of contact

    asked by katie on August 20, 2012
  38. physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 26.4 m/s. The ball hits the court at a horizontal distance of 18.4 from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by S on September 15, 2014
  39. physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 26.7 m/s. The ball hits the court at a horizontal distance of 18.7 from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by Stephanie on February 7, 2013
  40. physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 26.4 m/s. The ball hits the court at a horizontal distance of 18.4 from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by S on September 15, 2014
  41. Physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 28.6 m/s. The ball hits the court at a horizontal distance of 18.4 m from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by Adrian on October 16, 2015
  42. Physics

    As a tennis ball is struck, it departs from the racket horizontally with a speed of 28.2 m/s. The ball hits the court at a horizontal distance of 19.5 m from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by Dee on January 30, 2013
  43. Physics

    Jeff’s basketball falls into a pond. There is no wind and the water is still. Jeff wants to get the ball. He throws a rock into the pond, which hits water at 2 ft behind the ball from Jeff’s view. What will happen to the ball?

    asked by Sydney on October 26, 2014
  44. physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 26.9 m/s. The ball hits the court at a horizontal distance of 18.1 from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by louis on February 6, 2013
  45. physics

    As a tennis ball is struck, it departs from the racket horizontally with a speed of 27.1 m/s. The ball hits the court at a horizontal distance of 20.0 m from the racket. How far above the court is the tennis ball when it leaves the racket

    asked by victoria C!! on October 20, 2013
  46. WR

    A tennis ball is struck and departs from the racket horizontally with a speed of 27.4 m/s. The ball hits the court at a horizontal distance of 20.0 from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by WR on September 7, 2013
  47. Physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 27.3 m/s. The ball hits the court at a horizontal distance of 18.7 from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by Justin on June 18, 2013
  48. physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 27.7 m/s. The ball hits the court at a horizontal distance of 20.6 m from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by Kristyn on March 25, 2015
  49. Physics

    A tennis ball is struck and departs from the racket horizontally with a speed of 29.1 m/s. The ball hits the court at a horizontal distance of 19.0 from the racket. How far above the court is the tennis ball when it leaves the racket?

    asked by Katy on September 15, 2013
  50. physics

    On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hits the ball with a speed of 25 m/s at an angle of 28°

    asked by Haley on March 5, 2012
  51. Physics (Help please)

    A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 60.0 kg athlete jumps down onto the platform from a height of 0.600 m.

    asked by Christian on April 8, 2014
  52. College Physics

    A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. Starting from rest, a 60.0 kg athlete jumps down onto the platform from a height of 0.600 m.

    asked by Christian on April 10, 2014
  53. Physics

    A Mercedes-Benz 300SL (m = 1700 kg) is parked on a road that rises 15° above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?

    asked by Litany on November 13, 2009
  54. physics

    Two people are pushing a disabled car. One exerts a force of 400 N east, the other a force of 200 N east. What is the net force exerted on the car?

    asked by Anonymous on November 5, 2013
  55. physical science

    Please check my answers on this physical science quiz, thanks 1. in which of the following scenarios are action and reaction forces involved? a. when a tennis racket hits a ball b. when you step from a curb c. when you row a boat d. all of the above** 2.

    asked by stacy on January 13, 2018
  56. Math

    In a Canadian Football League game, the path at one particular kick-off can be modelled using tge function h(d)=-0.02d^2+2.6d-66.5,where h is the height of the ball and d is the horizontal distance from the kicking team's goal line,both in yards. A value

    asked by Josh on March 6, 2017
  57. Physics

    1)The Earth exerts an 710 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N 2)If a book is sitting on a table, the force of gravity pulls it down. Why doesn’t it fall? Is it because The table is pushing up

    asked by Sally on March 1, 2013
  58. Physics

    A small ball rolls horizontally off the edge of a table that is 1.20 m high. It strikes the floor at a point 1.52 m horizontally from the table edge. How long is the ball in the air? What is the velocity of the ball when it hits the floor?

    asked by Eva on May 1, 2008
  59. Physics 11 - Dynamics

    While standing on a horizontal frictionless surface a 50.0 kg student pushes against a wall with an average force of 125 N to the right for 0.110 s. Calculate the velocity of this student at 1.110 s. My answer: Vf = 0.275 m/s My solutions book has Vf =

    asked by Samuel on March 19, 2013
  60. Physics

    A rope exerts a constant horizontal force of 203N pulling a 68-kg crate across the floor. The velocity of the crate is observed to increase from 3m/s to 5m/s in a time of 4 seconds under the influence of this force and the frictional force exerted by the

    asked by Tim on June 21, 2013
  61. calculus

    A ladder 29 feet long leans against a wall and the foot of the ladder is sliding away at a constant rate of 3 feet/sec. Meanwhile, a firefighter is climbing up the ladder at a rate of 2 feet/sec. When the firefighter has climbed up 6 feet of the ladder,

    asked by milly on February 19, 2016
  62. English/Writing

    Write brief accounts upon the nursery rhyme from the indicated point of view: "Little Miss Muffet" 1. The spider's reaction to his treatment when he tried to be friendly. "How rude of that little girl! I was only trying to say hello." "Humpty Dumpty" 1.

    asked by Victoria on October 29, 2015
  63. Physics

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.42 m, and

    asked by Adriana on January 28, 2016
  64. physics

    A baseball (m = 145 g) traveling 20 m/s moves a fielder's glove backward 25 cm when the ball is caught. What was the average force exerted by the ball on the glove? Magnitude N Direction in the direction opposite to the ball's motion in the direction of

    asked by mathew on February 7, 2015
  65. physiC

    A uniform door (0.81 m wide and 2.1 m high) weighs 150 N and is hung on two hinges that fasten the long left side of the door to a vertical wall. The hinges are 1.9 m apart. Assume that the lower hinge bears all the weight of the door. Determine the

    asked by lina on March 1, 2011
  66. physics

    the force that charge qA exerts on charge qB is ___ the force that charge qB exerts on charge qA. opposite and equal to opposite and greater than opposite and less than the same as

    asked by anonymous on March 28, 2011
  67. Physics

    Two bowling balls each have a mass of 6.8kg. the speres are located nest to one another with their centers 21.8 cm apart. what gravitational force do they exert on each other?

    asked by Lorena on May 3, 2010
  68. physics

    ball of mass m = 1.70 kg is released from rest at a height h = 54.0 cm above a light vertical spring of force constant k. The ball strikes the top of the spring and compresses it a distance d = 8.80 cm Neglecting any energy losses during the collision,

    asked by sherry on March 3, 2016
  69. Bio

    In spite of factors that tend to restrict cell size, some plant cells are very large. For example, some marine algae have cells almost as large as a chicken egg which of the following characteristics would favor the growth of large cells? 1- thin layer of

    asked by bubba on October 26, 2009
  70. Bio

    In spite of factors that tend to restrict cell size, some plant cells are very large. For example, some marine algae have cells almost as large as a chicken egg which of the following characteristics would favor the growth of large cells? 1- thin layer of

    asked by bubba on October 25, 2009
  71. Physics

    A bowling ball of mass M and radius R is thrown along a level surface so that initially ( t= 0) it slides with a linear speed but does not rotate, see the figure. As it slides, it begins to spin, and eventually rolls without slipping. How far has the ball

    asked by Helen on December 4, 2011
  72. Physics

    A bowling ball of mass M and radius R is thrown along a level surface so that initially ( t= 0) it slides with a linear speed but does not rotate, see the figure. As it slides, it begins to spin, and eventually rolls without slipping. How far has the ball

    asked by Helen on December 4, 2011
  73. Physics

    A uniform solid cylinder of mass 10 kg can rotate about a frictionless axle through its center. A rope wrapped around the outer radius R1 = 1.0 m exerts a force of magnitude F1 = 5.0 N to the right. A second rope wrapped around another section of radius R2

    asked by Jamie on March 26, 2018
  74. Physics - Center of Mass

    A baseball player uses a bat with mass mbat to hit a ball with mass mball. Right before he hits the ball, the bat's initial velocity is 36 m/s, and the ball's initial velocity is -20 m/s (the positive direction is along the positive x-axis). The bat and

    asked by Ray on June 16, 2012
  75. physics

    A boy pulls a bag of baseball bats across a ball field toward the parking lot. The bag of bats has a mass of 6.8 kg, and the boy exerts a horizontal force of 20 N on the bag. As a result, the bag accelerates from rest to a speed of 1.12 m/s in a distance

    asked by silvia on April 3, 2017
  76. Physics

    A tennis player hits a ball 1.6m above the ground. The ball leaves the racket with a speed of 12m/s at an angle 8.0 above the horizontal. The net is a horizontal distance of 7.0m away from the player and is 1.0m high. a) does the ball clear the net?

    asked by Brittany on September 19, 2016
  77. Math

    during a match, pat kicks a football onto the roof of the stand. The stand and the path of the ball are at righ angles to each other. The path of the ball is given by y=2.5x-x^2÷15 The roof of the stand is given by y=x÷2+48 ÷5, where 18

    asked by Ellie on November 13, 2012
  78. PHysics

    A ballplayer standing at home plate hits a baseball that is caught by another player at the same height above the ground from which it is hit. The ball is hit with an initial velocity of 20.6 m/s at an angle of 58.9 degrees above the horizontal. How high

    asked by Anonymous on November 5, 2009
  79. Mechanics

    During a soccer game a ball (of mass 0.425 kg), which is initially at rest, is kicked by one of the players. The ball moves off at a speed of 26 m/s. Given that the impact lasted for 8.0 ms, what was the average force exerted on the ball? Show the solution

    asked by Aries on September 19, 2013
  80. physics

    A ball (m=53g) is projected vertically with an initial speed of 9.2m/s. If the ball rises to a maximum height of 3.6m, how much kinetic energy is dissipated by the drag force of air resistance? I know it is .373J How much higher would the ball have gone in

    asked by dale on November 10, 2010
  81. Physics! - PLEASE HELP

    A 75 kg passenger in a van is wearing a seat belt whent he van moving at 15m/s, collides with a conrete wall. The front end of the van collapses 0.50 m as it comes to rest. a) what was the paseenger's kinetic energy before the crash b) What average force

    asked by Allison on July 12, 2011
  82. physcis

    A painter climbs a ladder leaning against a smooth wall. At a certain height, the ladder is on the verge of slipping. Let the mass of the painter be 85.0 kg, length = 5.80 m, the ladder’s mass to be 37.0 kg, è = 51.0°, and the coefficient of friction

    asked by Anonymous on November 11, 2012
  83. Physics

    Researchers have found that a gecko's foot is covered with hundreds of thousands of small hairs (setae) that allow it to walk up walls and even across ceilings. A single foot pad, which has an area of , can attach to a wall or ceiling with a force of 11 .

    asked by Kelli on October 3, 2010
  84. Physics

    golf club with a mass of 250 g travels at 50 meters per second hits a 40 g golf ball and continues traveling at 35 m/s. What is the speed of the golf ball after impact?

    asked by Spencer on May 10, 2011
  85. physics

    A ball is rolling with an initial velocity of 5.55 m/s over a table moves over the edge and falls to the ground. How long is the ball in the air when the table is 1.11m high. a. How long is the ball in the air before it hits the ground? b. How far from the

    asked by sea lively on October 8, 2018
  86. physics

    A spring (spring 1) with a spring constant of 520N/m is attached to a wall and connected to another weaker spring (spring 2) with a spring constant of 270N/m on a horizontal surface. Then an external force of 70N is applied to the end of the weaker spring

    asked by victoria on June 29, 2013
  87. Physics

    A ball dropped from rest on to horizontal ground 20m between rebounds with 3/4 of the velocity with which it hits the ground find time that elapses between the first and second in part of the ball with the ground

    asked by Anonymous on October 2, 2011
  88. Bio

    what is another method for classifying bacteria? (other than shape or cell wall structure). thanks! :)

    asked by Josh on March 2, 2011
  89. Reading

    How is the main idea of the "The Voice from the Wall " written by Amy Tan

    asked by Thang on February 3, 2011
  90. english 201

    An essay on the yellow wall paper by charlotte Gilman. how do I start.

    asked by slymeena on March 3, 2015
  91. simile

    What does the simile mean for a haze rises from the bay like a wall of gray closing you off from everything?

    asked by Sharon on September 22, 2014
  92. English

    Either the wall clock or our wristwatches (tell, tells) the correct time. tel

    asked by Clayton on December 10, 2010
  93. math

    A building is 17 ft high, what is the lenght the ladder must be to extend 3 ft higher than wall

    asked by courtney on July 13, 2014
  94. science

    write a detail note on plasma membrane & cell wall?

    asked by sangam on June 26, 2008
  95. Alg 1

    A triangular-shaped wall has a base of 2x+4 and a height of x+3. The area of the triangle is 56 in^2. What is the value of "x"?

    asked by Jane on April 13, 2013
  96. ENGLISH

    WHAT IS THE SIMILE OF THE POEM SMALL PASSING "THEIR MOURNING RISES LIKE A WALL

    asked by KHOLEKA on August 16, 2016
  97. biology

    how does cellulose adapt to its function!? i think it has something to do with there being a strong cell wall. however im am unsure. please could somebody help me thanks

    asked by mark on October 25, 2007
  98. english

    we painted the wall green yesterday. this pattern is svoca am i correct .

    asked by Anonymous on September 19, 2014
  99. science... biology..

    heyy ..love the websitee u don't have the definition for cell wall ..

    asked by kristenn on October 14, 2008
  100. Statistics (43)

    Consumption of alcoholic beverages by young women of drinking age has been increasing in the United Kingdom, the United States, and Europe (The Wall Street Journal, February 15, 2006). Data (annual consumption in liters) consistent with the findings

    asked by Mia on May 6, 2014