1. sciecne

    Two thin hollow plastic spheres, about the size of a ping-pong ball with masses (m1 = m2 = 2e-3 kg) have been rubbed with wool. Sphere 1 has a charge q1 = -6e-9 C and is at location < 40e-2, -20e-2, 0 > m. Sphere 2 has a charge q2 = -6e-9 C and is at

    asked by sara on June 25, 2014
  2. physics

    A ball is dropped from a helicopter which is descending at 1.5 m/s. After 2 seconds, what are a) the the velocity of the ball, and b) how far is the ball below the helicopter? c) & d) Repeat your calculations for a) and b) if the helicopter had been rising

    asked by john smith on September 10, 2015
  3. numerical

    a ball is dropped from height h after one second another ball dropped freely from point 20 m below where first ball dropped both of them reach the grount at the same time calculate the value of h

    asked by alok on July 14, 2018
  4. science proyect

    Which type of ball will bounce highest when dropped from a height of 48 inches, a 8 inches ball(small) or a 12 inches ball(big)?

    asked by kamaaya on December 1, 2013
  5. physics

    why is the following situation impossible? a normally proportioned adult walk briskly along a straight line in the +x direction, standing straight up and holding his right arm vertical and next to his body so that the arm does not swing. his right hand

    asked by rex on August 2, 2014
  6. physics - please help me!

    Hello! I'm having a bit of trouble trying to solve this physics problem. I'm not sure which equations to use or where or how to plug my variables: Robin Hood wishes to shoot an arrow through the open window of a tall castle wall. The window is 16m meters

    asked by Mariam on April 10, 2018
  7. Science

    The Sun exerts a gravitational force of 3.56 x 10^22 N on Earth. The mass of the Sun is 2.0 x 10^30 kg. The mass of the Earth is 6.0 x 10^24 kg. If we assume the Earth has a circular orbit of 1.5 x 10^11 m, what is the velocity needed for Earth to remain

    asked by Boberto on November 29, 2016
  8. Physics

    There is a vertical tension at the top of a 4 m long ladder holding it at an incline. The bottom of the ladder is touching the floor, which exerts a normal force. You are standing 1 meter from the top of the ladder. What happens to the tension as you walk

    asked by Gunther on November 4, 2010
  9. Physics

    A Federation starship (2500000 kg) uses its tractor beam to pull a shuttlecraft (10000) aboard from a distance of 7 km away. The tractor beam exerts a constant force of 25000 N on the shuttlecraft. Both spacecraft are initially at rest. How far does the

    asked by Daniel on October 11, 2011
  10. physics

    A wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces at 16 º angle on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 19.5 N, what

    asked by marissa on September 14, 2012
  11. physics

    A person at the roof of a high building has projected a ball at velocity 50m/s given that the acceleration due to gravity = 10 the displacement and velocity when : The ball has been protected upwards with angle 30 to the horizontal. And when the ball been

    asked by Youssef ismail on January 8, 2015
  12. Math

    A man throws a ball horizontally from the top of a hill 4.9m high. He wants the ball to clear a fence 2.4m high standing on horizontal surface and 8m horizontally away from the point of projection. Find the minimum speed at which the ball must be thrown.

    asked by Kiran on February 13, 2014
  13. Math

    When dropped on a hard surface, a rubber ball takes a series of bounces, each one about 4/5 as high as the preceding one. If the rubber ball is dropped from a height of 20 ft, what is the approximate distance the ball travels before coming to rest? Please

    asked by Ashley on March 5, 2015
  14. physics

    A 9.0 kg iron ball is dropped onto a pavement from a height of 110 m.If half of the heat generated goes into warming the ball, find the temperature increase of the ball. (In SI units, the specific heat capacity of iron is 450 J/kg*degree C.)

    asked by Jim on April 3, 2012
  15. Math

    A ball is thrown downward from the top of a 100-foot building with an initial velocity of 14 feet per second. The height of the ball h after t seconds is given by the equation h=-16t^2-14t+100. How long after the ball is thrown will it strike the ground?

    asked by Rachel on April 28, 2014
  16. Science

    Ben threw a ball up in the air with an initial velocity of 15m/s from a 17m high platform. A.What is the max height reached before failling down? B.How long was the ball in the air? C.What is the final velocity of the ball upon reaching the ground?

    asked by Blakey on July 22, 2017
  17. Physics Honors

    A pool ball leaves a 0.60 meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground and the horizontal distance between the table's edge and the ball's landing location.

    asked by Allison on October 23, 2011
  18. Physics

    A basketball player is trying to make a half-court jump shot and releases the ball at the height of the basket. Assuming that the ball is launched at 51 degrees, 14.0 m from the basket what speed must the player give the ball? So far I found the Vy to be

    asked by emm on November 16, 2009
  19. Physics

    A man throws a ball horizontally from the top of a hill 4.9m high. He wants the ball to clear a fence 2.4m high, standing on a horizontal surface and 8m horizontally away from the point of projection. Find the minimum speed at which the ball must be

    asked by Kiran on February 13, 2014
  20. Science

    in a cricket match a spin bowler bowls a ball from one end of the pitch to rough spot on the pitch which is 18.6 metres from where he lets go of the ball if the ball takes 1.4 seconds to hit the spot calculate its average speed

    asked by Jaye on August 25, 2015
  21. Physics

    A ball is thrown straight upward and returns to the thrower’s hand after 2.90 s in the air. A second ball is thrown at an angle of 32.0 ◦ with the horizontal. At what speed must the second ball be thrown so that it reaches the same height as the one

    asked by Ryan on December 3, 2011
  22. physics

    . A tennis player serves the ball at a height of h with an initial velocity of 40m/s at an angle of 4 0 with the horizontal. Knowing that the ball clears the 0.941m net by 152mm. Determine (a) the height h (b) the distance d from the net to where the ball

    asked by Anonymous on April 16, 2015
  23. Physics

    It’s a beautiful winter day, and you and your friend are throwing around a 5 kg medicine ball on a very slippery frozen lake. You throw the ball toward your friend, and notice that you subsequently slide backwards with a speed of 1 m/s. If your mass is

    asked by Aaron on February 13, 2012
  24. math

    a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a

    asked by Erin on February 14, 2013
  25. Physics

    A ball of mass m makes a head-on elastic collison with a second ball (at rest) and rebounds in the opposite direction with a speed equal to 1/4 it's original speed. What is the mass of the second ball? I would really apprieciate it if ya'll would show

    asked by Henry on November 9, 2012
  26. science

    A boy standing on top a building with a height of 500m throws a ball vertically upwards. The balls take 40s to reach to the ground. Neglecting the height of the boy throwing the ball, determine the velocity of the ball.

    asked by Pankaj kumar suman on December 23, 2012
  27. Physics

    A cannon barrel is elevated at an angle of 45°. It fires a ball with a speed of 250 m/s. (For the following questions, ignore air resistance.) (a) What height does the ball reach? m (b) How long is the ball in the air? s (c) What is the horizontal range

    asked by Anonymous on December 2, 2014
  28. maath HELPPPP

    a ball is thrown into the air at a speed of 96 feet/sec. The equation that expresses the height of the ball as a function of time is: h(t) = -16t2 + 96t + 5 How long does the ball stay in the air after it is thrown? (Round answer to the hundreths of a

    asked by Erin on February 14, 2013
  29. Physics

    A ball (mass of 0.5kg) is suspended on a string that is attached to the ceiling. The ball is charged with an unknown charge q. Determine the magnitude of the charge on the ball if the electric field strength is 2000N/C, and the string forms an angle of θ

    asked by Lenny on February 26, 2017
  30. Physics

    A 300 ball swings in a vertical circle at the end of a 1.2-m-long string. When the ball is at the bottom of the circle, the tension in the string is 13 . What is the speed of the ball at that point?

    asked by Dan on October 6, 2009
  31. physics

    A golfer takes two putts to get his ball into the hole once he is on the green. The first putt displaces the ball 8.10 m east, the second 6.00 m south. What displacement would have been needed to get the ball into the hole on the first putt?

    asked by micheal on February 22, 2012
  32. physics

    A 500 {\rm g} ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle, the tension in the string is 14 {\rm N}.What is the speed of the ball at that point?

    asked by Atlantis on April 1, 2011
  33. physics

    A golfer takes two putts to get his ball into the hole once he is on the green. The first putt displaces the ball 6.90 m east, the second 7.70 m south. What displacement would have been needed to get the ball into the hole on the first putt?

    asked by ashley on October 13, 2011
  34. physics

    A student drops a ball from the top of a tall building; the ball takes 2.8 s to reach the ground. 1. what was the ball's speed just before hitting the ground? 2. What is the height of the building? help please?

    asked by Fefe on October 24, 2009
  35. science

    Ball 2 with a mass of 30 kg, is moving left at 10 m/s. At what velocity should ball 1, with a mass of 10 kg, move to the right and collide with 2, so that ball 1 rebounds with a velocity of 10 m/s. assume that the collision is perfectly elastic.

    asked by Milli on February 21, 2012
  36. Physics

    A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-fourth its original speed. What is the mass of the second ball?

    asked by Eric on December 10, 2009
  37. physics

    spherical aluminum ball of mass 1.22 kg contains an empty spherical cavity that is concentric with the ball. The ball just barely floats in water.Calculate the radius of the cavity.

    asked by jenna on October 5, 2010
  38. physics

    The coefficient of sliding friction between rubber tires and wet pavement is 0.50. The brakes are applied to a 750 kg car traveling 30 m per second, and the car skids to a stop. What is the magnitude and direction of the force of friction that the road

    asked by Anonymous on August 17, 2011
  39. Physical science

    A force t=312n up and incline is reward to keep a body at rest on a fritionless inclined plane which make an angle of 35degress with horizontal. Draw a force diagram and label all the force acting on a body. Calculate the magnitude of the force due to

    asked by Thulaganyo on February 24, 2015
  40. vectors

    The minute hand of a wall clock measures 11 cm from its tip to the axis about which it rotates. The magnitude and angle of the displacement vector of the tip are to be determined for three time intervals. What are the (a) magnitude and (b) angle from a

    asked by Katie on February 2, 2015
  41. physics

    The drawing shows a wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces, and , on this tooth in order to bring it back into alignment. If the forces have the same magnitude of

    asked by ben on August 12, 2015
  42. PHYSICS

    A hiker, who weighs 977 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4500 N, and rests on two concrete supports, one on each end. He stops 1/6 of the way along the bridge. What is the magnitude of

    asked by Anonymous on May 2, 2015
  43. Physics 1

    The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces and ' on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 15.0

    asked by Donald on October 29, 2012
  44. physics

    The drawing shows a wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces,  and , on this tooth in order to bring it back into alignment. If the forces have the same magnitude

    asked by Tyler on January 11, 2017
  45. physics

    A curved road is banked at an angle such that friction is not necessary for a car to stay on the road. a 2500 kg car is traveling at a speed of 25 ms and the road has a radius of curvature equal to 40 m. calculate the magnitude of force that the road

    asked by amelia on October 4, 2015
  46. PHYSICS

    A hiker, who weighs 976 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4350 N, and rests on two concrete supports, one on each end. He stops 1/3 of the way along the bridge. What is the magnitude of

    asked by Anonymous on November 3, 2015
  47. physics

    A hiker, who weighs 811 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3350 N, and rests on two concrete supports, one on each end. He stops 1/6 of the way along the bridge. What is the magnitude of

    asked by Tyler on February 3, 2017
  48. physics 1

    The drawing shows a wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces, and T,T1 on this tooth in order to bring it back into alignment. If the forces have the same magnitude of

    asked by Anonymous on February 18, 2014
  49. Physics

    A placekicker kicks a football with a velocity of 35 m/sec and an angle of 25˚ above the horizontal. When the football is 10 m off the ground, a. What is the horizontal velocity of the ball? b. What is the vertical velocity of the ball? c. What is the

    asked by Bob on October 16, 2017
  50. Science

    1. True or False: If the net force of an object is 0 N, the forces are considered unbalanced. A.)True B.)False** 2. Most people in the United States use feet and miles to measure distance in their everyday lives. Why do scientists in the United States use

    asked by Voldemort on February 10, 2017
  51. Physics

    A 54 kg box is being pushed a distance of 7.0 m across the floor by a force P whose magnitude is 153 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the

    asked by Brandon on October 13, 2008
  52. ap Physics

    AP PROBLEM CHILD ON A SWING AN ADULT EXERTS A HORIZONTAL FORCE ON A SWING THAT IS SUSPENDED BY A ROPE OF LENGTH L, HOLDING IT AN AN ANGLE q WITH THE VERTICAL. THE CHILD IN THE WING HAS WEIGHT W AND DIMENSIONS THAT ARE NEGLIGIBLE COMPARED TO L. THE WEIGHTS

    asked by Anonymous on January 3, 2011
  53. physics

    a rock is tossed straight up with a speed of 30m/s. when it returns it falls into a hole 10m deep. what is the rocks velocity as it hits the bottom of the whole? how long would the rock in the air, form the instant it is released until it hits the bottom

    asked by nicolas on August 30, 2012
  54. physics

    Two balls have their centers 2.0 m apart. One ball has a mass of m1 = 8.3 kg. The other has a mass of m2 = 5.9 kg. What is the gravitational force between them? (Use G = 6.67 10-11 N · m2/kg2.)

    asked by Danny on December 3, 2012
  55. Physics

    A massless rope passes over a massless, frictionless pulley. One end of the rope is connected to box 2, and the other end is connected to box 3. The weights of the three boxes are W1 = 50.7 N, W2 = 32.1 N, and W3 = 28.6 N. Determine the magnitude of the

    asked by StressedStudent on September 25, 2012
  56. Language Arts

    Chapter 1: The Cobbler's Son My name was Tommy Stubbins, son of Jacob Stubbins, the cobbler of Puddleby-on-the-Marsh; and I was nine and a half years old. At that time Puddleby was only quite a small town. A river ran through the middle of it; and over

    asked by Marc-Anthony on January 8, 2016
  57. Math

    a light shines from the top of a pole 50ft high. a ball is dropped from the same height from a point 30 ft away from the light. how fast is the ball's shadow moving along the ground 1/2 sec later? (assume the ball falls at a distance of s=16t^2 in t sec)

    asked by Teri on June 8, 2012
  58. Physics

    Josh is standing on the roof of the school 12 meters directly above James who kicks a soccer ball straight up with an initial velocity of 15 m/s. If Josh catches the ball on the way up, how long will the ball take to reach him? If he misses it on the way

    asked by Jessica on October 11, 2016
  59. science

    a bouncing ball of mass 200g leaves the ground with a kinetic energy of 10J a)if the ball rises vertically, calculate the maximum height it is likely to reach. b)in practice, the ball rarely reaches the maximum height. explain why this is so.

    asked by anabel on December 1, 2011
  60. physics

    A tennis player serves a tennis ball it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 12 meters, it has dropped 55cm from its original height when it left the racquet. What is the initial speed of the

    asked by jack on September 13, 2015
  61. AP Physics

    What is the minimum height you would have to place a solid ball of mass M and radius R (I = 2MR^2 / 5) on a hill in order for the ball to make it completely around a circular loop at the bottom of the hill? The diameter of the loop is D. Assume the ball

    asked by tyger2020 on December 9, 2018
  62. Physics

    (a) Suppose that on the moon an astronaut hit a golf ball so that it left his club at a speed of 45ms-1, at an angle of 20degrees to the horizontal. calculate the time of flight of the ball. (b) calculate the horizontal distance travelled by the ball

    asked by Adam on October 28, 2012
  63. Physics

    A ball is fastened to one end of a 30cm string, and the other end is held fixed to a support. the ball whirls in a horizontal circle. Find the speed of the ball in its circular path if the string makes an angle of 30 degrees to the vertical.

    asked by Liz on February 27, 2014
  64. Physics

    What is the minimum height you would have to place a solid ball of mass M and radius R (I=2MR^2/5) on a hill in order for the ball to make it completely around a circular loop at the bottom of the hill? The diameter of the loop is D. Assume the ball rolls

    asked by Suzy on April 3, 2013
  65. Physics

    A ball is thrown straight upward and returns to the thrower’s hand after 2 s in the air. A second ball is thrown at an angle of 38 degrees with the horizontal. At what speed must the second ball be thrown so that it reaches the same height as the one

    asked by chris on February 5, 2013
  66. Physics

    A ball (mass of 0.3kg) is suspended on a string that is attached to the ceiling. The ball is charged with an unknown charge q. Determine the magnitude of the charge on the ball if the electric field strength is 3000N/C, and the string forms an angle of θ

    asked by Anonymous on February 27, 2017
  67. physics

    a ball mass 800g is dropped from height of 5m and rebounds to a hight of 3.8m the air resistance is negligible. calculate a. the kinetic energy of the ball just before impact b. the initial rebound speed of the ball c. the energy transferred to the ground

    asked by lewis on December 13, 2010
  68. Science

    Which three forces are applied on winds in the upper atmosphere? 1. Gravity 2. Pressure gradient force 3. Coriolis force 4. Centripetal force 5. Frictional force Pressure gradient force, Coriolis force, and Centripetal force. Is this correct?

    asked by ! on October 9, 2018
  69. Physics

    A football punter accelerates a 0.53 kg foot- ball from rest to a speed of 8.6 m/s in 0.24 s. What constant force does the punter e

    asked by Chris on January 25, 2015
  70. Math

    A pitcher throws a 142 g baseball, which accelerates at a speed of 9 m/s^2. How much force does the pitcher apply to the ball?

    asked by Anonymus on May 4, 2015
  71. physical science

    which one opf the 4 forces opposes the electromagnetic force in the nucleus of an atom: strong force weak force gravity I thought it was stong force

    asked by liz on November 3, 2007
  72. physical science

    which one opf the 4 forces opposes the electromagnetic force in the nucleus of an atom: strong force weak force gravity I thought it was stong force

    asked by liz on November 3, 2007
  73. physics

    1 An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2 15 m above the top of the building 30 m below the top of the building 15 m below the top of the

    asked by james on February 17, 2014
  74. Physics

    Which is the strongest fundamental force acting between microscopic particles? A. Strong force B. Weak force C. Gravity D. Electromagnetic Force I think it's either A or D, but I'm not sure which.

    asked by Jess on May 1, 2009
  75. physics

    A car traveling at 62 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 58 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force in newtons (assumed constant) acts on the

    asked by Mary on March 7, 2011
  76. Physics

    How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s? a. 100 J. b. 50 J. c. 10 J. d. 5 J. A ping pong ball and a golf ball move with the same kinetic energy. Which is moving fastest? (golf balls are heavier than ping pong balls). a.

    asked by Trinh on October 19, 2011
  77. Physics

    A small 6.8 g plastic ball is suspended by a 37.3 cm long string in a uniform electric field of 4790 N/C, as shown. The acceleration of gravity is 9.8 m/s2 , and the Coulomb constant is 8.99×109 N · m2/C2.. If the ball is in equilibrium when the string

    asked by Anonymous on February 25, 2010
  78. physics

    The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces and ' on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 17.0

    asked by Natasha on February 21, 2012
  79. physics

    Why is this following situation impossible? A normally proportioned adult walks briskly along a straight line in the +x direction, standing straight up and holding his right arm vertical and next to his body so that the arm does not swing. His right hand

    asked by Ania on October 18, 2012
  80. Physics

    A 5.80 kg ball is dropped from a height of 14.5 m above one end of a uniform bar that pivots at its center. The bar has mass 9.00 kg and is 6.40 m in length. At the other end of the bar sits another 5.30 kg ball, unattached to the bar. The dropped ball

    asked by Joe on April 5, 2012
  81. physics

    A small sphere of charge q = +68 ƒÝC and mass m = 5.8 g is attached to a light string and placed in a uniform electric field E that makes an angle ƒá = 37„a with the horizontal. The opposite end of the string is attached to a wall and the sphere is

    asked by Anonymous on November 6, 2012
  82. physics

    A small sphere of charge q = +68 ƒÝC and mass m = 5.8 g is attached to a light string and placed in a uniform electric field E that makes an angle ƒá = 37„a with the horizontal. The opposite end of the string is attached to a wall and the sphere is

    asked by Anonymous on November 6, 2012
  83. Physics

    ball 1 with an initial speed of 10 m/s collides elastically with stationary balls 2 and 3 that are initially in contact with each other. the centers of balls 2 and 3 are on a line perpendicular to the initial velocity of ball 1. the three balls are

    asked by Sarah on January 13, 2008
  84. Physics

    Hey! I've tried using equations such as weight=m*g for this problem, but I don't think I'm doing it right. Can someone help? A helicopter was seen carrying a heavy bag of sand (1210.0 kg). A student figured that the acceleration of the sand bag then was

    asked by James on February 22, 2015
  85. Physics please check

    An electric clock is hanging on the wall in the living room. The clock is unplugged, and the second hand comes to a halt over a brief period of time. During this period, what is the direction of the angular acceleration of the second hand? a. clockwise b.

    asked by Mary on April 24, 2007
  86. Physics

    A 3.23 kg ball is attached to a ceiling by a 1.31 m long string. The height of the room is 5.75 m. What is the gravitational potential energy of the ball relative to the ceiling? What is the gravitational potential energy of the ball relative to the floor?

    asked by Anonymous on March 9, 2013
  87. physics

    A 2.00 kg ball is attached to a ceiling by a 1.40 m long string. The height of the room is 3 m. What is the gravitational potential energy of the ball relative to the ceiling? What is the gravitational potential energy of the ball relative to the floor?

    asked by Anonymous on November 7, 2009
  88. Physics

    A 55kg arrow is fired vertically upward at a speed of 42m/s. It rises upwards, then drops and lands on the ground. If it lodges itself 12cm in the ground, determine the average force that the ground exerts on the arrow This is what I've done but I don't

    asked by Laura on March 26, 2017
  89. physics

    Estimate the speed of the parachutist descending at the constant velocity with open parachute. Assume the area of the parachute, A = 30 m^2, mass of a person, m = 100 kg, and density of air, roh = 1 kg/m^3. Enter the answer limited to the second decimal

    asked by Anonymous on February 21, 2011
  90. Math

    ) If you are standing near the edge of the top of a 200 ft. building and throw a ball vertically upward it will be modeled by the function 𝑠(𝑡) = −16𝑡2 + 64𝑡 + 200 where s(t) is the balls height above ground in feet and t is seconds after the

    asked by Kevin on December 4, 2014
  91. Physics

    A 120 g ball moving to the right at 4.2 m/s catches up and collides with a 450 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic, what are the speed and direction of each ball after the collision?

    asked by Zach on November 30, 2009
  92. Physics - Momentum

    A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-third its original speed. What is the mass of the second ball?

    asked by DJ on December 10, 2009
  93. Physics

    How high does the 35g ball go if the ball leaves the spring at the point shown in image? K=953 N/m and Xa=0 and Xb=0.120m (b)? What is the velocity of the ball when it leaves the spring?

    asked by bobby on March 26, 2012
  94. physics

    a metal ball with a charge of 5.4x10^8 electrons is touched to another metal ball so that all the excess electrons are shared equally. What is the final cahrge on the first ball?

    asked by lindsay on June 7, 2012
  95. MATH214

    A tennis ball can in the shape of a cylinder holds three tennis balls snugly. If the radius of a tennis ball is 3.5 cm, what percentage of the tennis ball can is occupied by air?

    asked by Rebecca on March 3, 2010
  96. physics

    A soccer player kicks a ball into the air at an angle of 34 degrees above the horizontal . The initial velocity of the ball is 25 m/s How long is the soccer ball in the air ?

    asked by lala mon on November 14, 2011
  97. Physics

    A cannon ball is fired horizontally from a cannon that is 40.7m above the ground. The initial velocity of the cannon ball is 234m/s. How much time does the cannon ball spend in the air?

    asked by Mary on January 29, 2017
  98. Physics

    A ball, initially at y = 0, is thrown straight down and takes 1.50 s to move 15.5 m in the - y direction. Calculate the initial velocity of the ball. Calculate the velocity of the ball at t = 0.900s.

    asked by Fawad on September 25, 2011
  99. Physics

    An electron is placed near a neutron. Which statement best describes the electrostatic force between them? a) there's no force between them since one is neutral b)there's a force of repulsion between them c)there's a force of attraction between them Isn't

    asked by Andrea on April 5, 2008
  100. physics

    A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.875 m/s encounters a rough horizontal surface of length ℓ = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a

    asked by Ange on March 9, 2015