1. Physics

    A proton of mass mP and a positively charged nucleus of mass 9mP are widely separated and traveling towards each other at the same speed of 1500 m/s along the same line.  Because they are both positively charged, they repel each other and undergo a soft

    asked by AH on October 25, 2012
  2. physics

    The system in the Figure is in equilibrium. A mass M1 = 226.0 kg hangs from the end of a uniform strut which is held at an angle è = 41.0° with respect to the horizontal. The cable supporting the strut is at angle á = 27.4° with respect to the

    asked by Katrina on October 14, 2014
  3. physics

    A 0.80-m aluminium bar is held with its length parallel to the east-west direction and dropped from a bridge. Just before the bar hits the river below, its speed is 22 m/s, and the emf induced across its length is 5 X 10-4 V. Assuming the horizontal

    asked by talemi on December 2, 2014
  4. Algebra 2

    For a typical basketball shot, the ball's height in feet will be a function of time in flight in seconds, modeled by an equation such as h = -16t^2 + 40t + 6. Find when the shot might reach the height of the basket which is 10 feet.

    asked by Eenra on April 16, 2016
  5. physics

    A tennis ball attached to the end of a light string hangs inside a car traveling on a circular track at 4.7 m/s. What is the radius of the circular track if the string makes a 10° angle with the vertical direction?

    asked by Sam on July 6, 2018
  6. physics

    if the rolling ball represents the running vaulter and the ruler represents the pole in the model, how does the amount of bend in the pole depend on the vaulters running speed? record your data and response in your log.

    asked by dana on March 6, 2011
  7. Physics

    A football is kicked at an angle of 60 degrees above the horizontal. To make the field goal it must reach a height of at least 3.048 m above the ground. What is the minimum speed the ball can be kick in order make a field goal?

    asked by cooper on June 11, 2015
  8. algebra

    The height of a ball dropped from a tall building is modeled by the equation d(t) = 16t2 where d equals the distance traveled at time t seconds and t equals the time in seconds. What does the average rate of change of d(t) from t = 2 to t = 5 represent?

    asked by Anonymous on March 29, 2014
  9. Physics

    A baseball teams ace pitcher throws fast balls at a velocity of 160kmh, the balls are released at a height of 1.6m from the ground, given that the distance between pitcher and plate is 18.4m how far has the ball dropped when it passes over the plate?

    asked by Alex on July 29, 2012
  10. physics

    A 2kg ball attached to the ceilling with a string is released and swings back and forth. Assume there is no air resistance. At the bottom of the path the lowest point the velocity is 4m/s. What is the velocity when it returns to the lowest point

    asked by karen on December 20, 2010
  11. physics

    3) A football is kicked at an angle of 60 degrees above the horizontal. To make the field goal it must reach a height of at least 3.048 m above the ground. What is the minimum speed the ball can be kick in order make a field goal?

    asked by cooper on June 11, 2015
  12. physics

    A ball is dropped into a well. A splash is heard 43 seconds later. The speed of sound (the speed at which sound travels through the air) is 345 m/s. HOW DEEP WAS THE WELL? I don't even know which equation to plug this into. At first I just tried s=d/t->

    asked by Debby on August 30, 2014
  13. Physic

    A block of mass 0.500 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x ( see Fig. below)The force constant ofthe spring is 450 N/rn. When it is released the block travels along a frictionless,

    asked by Pongsathorn on January 29, 2017
  14. physics

    A car with a mass of 1.1 × 103 kilograms hits a stationary truck with a mass of 2.3 × 103 kilograms from the rear end. The initial velocity of the car is +22.0 meters/second. After the collision the velocity of the car is -11.0 meters/second. What is the

    asked by Edwin on May 23, 2017
  15. Physics

    A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 300 m. You can ignore air resistance. How much time is required for the bomb to reach

    asked by Mattie on October 17, 2010
  16. physics

    1)An elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of spring is? 2)A force of 100N stretches an elastic spring to a total of 20cm. If an additional force of

    asked by Anne on April 9, 2013
  17. Physic

    a steel ball dropped from a helicopter, and after 4s its acceleration is 8m/s. with freefall given iirs physics definition, the body A. Definitely not free falling B. is likely free falling but there's insufficient information given C. It's not likely free

    asked by Amy on June 16, 2013
  18. physics

    A mass of 20 kg on a plane inclined at 40 degrees. A string attached to that mass goes up the plane, passed over a pullley and is attached to mass of 30 kg that hangs verticalyy. a) find the acceleration and it's dirction b) the tension in the string.

    asked by Benji on November 20, 2006
  19. maths

    Veronica bounced a ball from the roof of the school which was 16m high. The first bounce reached up to 8m, the next bounce was half as high again. How high would the fifth bounce have been? Do the numbers and see what you get. There are only four more

    asked by JaredN on August 6, 2007
  20. Physics-Someone please recheck

    Bob Pursley rechecked my question and it was correct if you scan down but he didn't direct me where to find direction of magnetic force on plane and do the pilots have to make corrections to make up for the difference? I'd appreciate any help with that, if

    asked by Russ on April 23, 2011
  21. Physics

    You are general in the Napoleonic wars. You are on top of a plain 12m talk and you have a cannon that can shoot a cannonball out at 350 m/s. 800 m away is a thick forest that you cannot see into but one of your scouts in a hot air balloon has just signaled

    asked by Michelle on February 22, 2014
  22. Physics

    You are general in the Napoleonic wars. You are on top of a plain 12m talk and you have a cannon that can shoot a cannonball out at 350 m/s. 800 m away is a thick forest that you cannot see into but one of your scouts in a hot air balloon has just signaled

    asked by Michelle on February 19, 2014
  23. physic

    Given: Compressor speed is 1500rpm. The compressor has a bore of 3.125 in, a stroke of 3.26in and a connecting rod crank ratio to 3.5. Inlet pressure is atmospheric 14.7 psia, peak cylinder pressure is 132psia, and mean active pressure mep is 26psia. Flow

    asked by zenden on August 12, 2012
  24. History

    What events led to the decline of the Chinese Nationalists? A. Soviet forces invaded china's heartland and teamed up with the socially progressive chinese nationalists to liberate the chinese peasants and rehabilitate the communists. B. The hostile chinese

    asked by Anonymous on August 14, 2018
  25. History

    What events led to the decline of the Chinese Nationalists? A. Soviet forces invaded china's heartland and teamed up with the socially progressive chinese nationalists to liberate the chinese peasants and rehabilitate the communists. B. The hostile chinese

    asked by Michael on May 18, 2018
  26. Physics

    In a lecture demonstration , a 3.0 m long vertical string wuth ten bolts tied to it at equal intervals is dropped from the ceiling of the lecture hall. The string falls on a tin plate, and the class hears the clink of each bolt as it hits the plate.the

    asked by Bunty on September 15, 2007
  27. physics

    A projectile is shot from the edge of a cliff 125 m above ground level with an initial speed of 105 m/s at an angle of 37.0o with the horizontal, as shown in Figure 3-39. (a) Determine the time taken by the projectile to hit point P at ground level. (b)

    asked by matin on April 25, 2012
  28. physics

    A soccer ball is kicked horizontally at 16.1 m/s off the top of a field house and lands 37.5 metes from the base of the field house. Determine the height of the field house.

    asked by tenzin on May 16, 2014
  29. Reading/Lanuage

    The Basketball team came to play a game. First they went onto the court. which sentence completes the sentence. A. Before they went to the game, they ate a small meal. B. then at half time they were loosing the game. c. They all drove to the game with

    asked by Debra on May 24, 2013
  30. physics

    A quarterback throws the football to a stationary receiver who is 22.7 m down the field.The football is thrown at an initial angle of 39◦ to the ground. The acceleration of gravity is 9.81 m/s2 . a) At what initial speed must the quarter- back throw the

    asked by jay on November 26, 2010
  31. Math

    a sports reportor said that 2 out of every 3 people at a home town base ball game named baseball vs their favorite sport the reporter claimed that baseball was the mostpopular sport in town which of th following explains why the reporters might not be true

    asked by kaden on May 9, 2016
  32. physics

    a ball is thrown vertically upward with a speed 25.0m/s (a)How high does it rise? (b)How long does it take to reach its highes point? (c)How long does it take to hit the ground after it reaches its highest point? (d)What is its speed when it returns to the

    asked by Anonymous on September 12, 2007
  33. algebra

    The ball is kicked straight up in the air from 4' off the ground Original velocity is 60' per second How many secs does it take to hit the ground. Do I use complete the square, square root property, quadratic formula, factoring? formula is h= 16tsquared +

    asked by barb on May 22, 2013
  34. Phyiscs

    A wooden box with a mass of 10.0kg rests on a ramp that is inclined at angle of 25 degrees to the horizontal. A rope attached to the box runs parallel to the ramp and then passes over a frictionless pulley. A bucket with a mass of m hangs from the end of

    asked by Lupita on February 6, 2014
  35. alg 2

    The path that a football takes can be described by the euation h=25t-5t^2 where h is the height in meters, of the football, at t, in seconds. How high is the ball after 3 seconds? h+25t-5^2 h= 25(3)-5(3)^2 h= 75- 45= 30 m

    asked by pb on February 24, 2015
  36. math

    the ratio of the distances a 7-iron and a 5- iron will dirve a golf ball is 5 to 6. if a golfer averages 153 yards with a 7- iron, how far should he averages with a 5-iron?

    asked by Anonymous on September 26, 2010
  37. physics

    A Christmas tree ball will break if dropped on a hardwood floor with a speed of 2.0 m/s or more. If it falls 15 cm from a tree branch to the floor, will it break?

    asked by Anonymous on September 27, 2011
  38. physics

    is the height of a ball be thrown directly related to the initial velocity? if i were to graph initial velocity as y and height as x,would it be a linear trend?

    asked by Anthony on January 29, 2017
  39. math/probability

    The Probability of drawing two black balls in succession from a bag containing 4 red and 3 black balls when the ball first drawn is a) replaced b) not replaced

    asked by viru on December 6, 2010
  40. physics

    If the 36.1 N force continues, the box accelerates at 0.71 m/s^2. What is the coefficient of kinetic friction? What is the coefficient of static friction between the box and the floor? If the 36.1 N force continues, the box accelerates at 0.71 m/s^2. What

    asked by Sam on September 30, 2010
  41. physics

    The fastest recoded pitch in Major league baseball was thrown by nolan ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809m(2.65 ft)by the time it reached home plate, 18.3m (60ft) away. how fast was ryans pitch?

    asked by Casey on November 6, 2010
  42. Physics

    Tank-killer rounds (fired by another tank) consist of a shell whose projectile is a long, slender (18.2 mm diameter by 31.7 cm long) cylindrical rod of depleted uranium of density 18.7 gm/cm3. Assume that the shell’s speed is 1550 m/s. You have

    asked by Ryan on October 19, 2008
  43. Science

    . Which of the following is a measure of motion, with the derived units in m/s? power force resistance speed

    asked by Amber on October 17, 2012
  44. physics

    Calculate the net force needed to give an acceleration of 0,5m/s to a trolley with a mass of 1,5 kg

    asked by Ephrime on February 8, 2011
  45. physics

    At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?

    asked by kate on March 9, 2009
  46. physics

    A hockey puck has no friction on it. It has a mass of 0.28 kg and experiences a force of 48 newtons. What is its acceleration?

    asked by Anonymous on February 1, 2012
  47. college physics

    Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.

    asked by matt on October 5, 2010
  48. mechanical engineering

    how much is the net force required to accelerate 1000kg of a car in 5mins/sec?

    asked by deeva on December 18, 2010
  49. physics

    What force F must be applied to the small piston to maintain the load of 49 kN at a constant elevation?

    asked by andre on November 6, 2014
  50. PHYSICS

    A 30 kg. balloon is filled with 100 m to the third power of helium. how much force is needed to hold it down?

    asked by DMITRIC on April 15, 2011
  51. Physics

    a westward force of 20 N acts on a 2.0 kg object moving eastward at 60 m/s for 2.0 s. What is the resulting velocity?

    asked by Dwaipayan on May 15, 2016
  52. Physics

    In what distance can a 25 gram bullet traveling at 250m/s be stopped by force of 5000N?

    asked by Aikawa on October 17, 2010
  53. Physics

    What is the circular force of a 150 g yoyo swung around on a 1.00 m string at a velocity of 5.0 m/s (in Newtons)?

    asked by Anonymous on June 16, 2013
  54. Angular momentum

    What is the angular momentum if the force is 72 N, the time is 1.5seconds and the lever arm is 3.2 meters?

    asked by Shelly on April 13, 2013
  55. Physics

    What is the gravitational force between two runners standing 100 meters apart on a track, if their masses are 60 kg and 75 kg respectively?

    asked by Justin on December 6, 2012
  56. physics

    if the resultant of 2 equal force inclint to each other at 60° is 8root3N. Find the component forces?

    asked by amal. on September 2, 2014
  57. physics

    State how the centripetal force is provided in the case of a satelite orbiting the earth

    asked by Cassandra on April 8, 2012
  58. physic

    calculate the attractive force between earth and sun. Neglect the radii, D= 1.50X10

    asked by Anonymous on February 20, 2012
  59. physics

    if a load 1kg streches a cordby 1.2cm.what is the force constantof the cord?

    asked by kelvin on November 6, 2014
  60. science

    Which type of simple machine reduces the amount of input force needed?

    asked by James on February 12, 2019
  61. Physics

    Consider the static equilibrium diagram below. What is the net force acting along the positive x-axis?

    asked by Donald on January 7, 2014
  62. physics

    How close must two electrons be if the electric force between them is equal to the weight of either at the earth's surface?

    asked by Niraj on January 20, 2008
  63. Physics

    a 100 N chandelier hangs from the ceiling on 8 chains. What is the tension force on each chain?

    asked by khushi on January 12, 2016
  64. physics

    YOU PUSH A REFRIGERATOR WIT HA FORCE OF 50N AND IT MOVES 3 METERS ACROSS THE FLOOR

    asked by MARIAH on November 10, 2010
  65. Physics

    How close would the masses 0.545 kg and 0.109 kg have to be in order for the gravitational force between them to have a magnitude of 1.03 N? Please Help!

    asked by Mike on January 21, 2013
  66. science

    - , Wednesday, October 3, 2007 at 6:01pm What is the name of the region around a magnet where force acts?

    asked by Rachezzle on October 3, 2007
  67. physics

    True or false, the acceleration of an object and the net force acting on it are proportional.

    asked by Ben Oo on September 29, 2011
  68. science

    what force is applied by Andre if he does 250 J of work as he pushes a box 19 M along the ground ?

    asked by anna on October 19, 2014
  69. Physical Science

    force of a toy jeep if the mass=50kg & is traveling at 4m/s& the radius is 50 centimeters.

    asked by Val on November 20, 2010
  70. physics

    Why do car have head rest?your answer should include the word"force"and "velocity"

    asked by lisa on May 17, 2012
  71. physics

    Why do car have head rest?your answer should include the word"force"and "velocity"

    asked by lisa on May 17, 2012
  72. chemistry

    In a mixture of ethanol and water, the strongest intermolecular force present between the two chemicals is

    asked by Anonymous on February 10, 2008
  73. chemistry

    In a mixture of ethanol and water, the strongest intermolecular force present between the two chemicals is

    asked by alex on February 4, 2008
  74. physics

    Calculate the amount work done on 60 N of force is used to move an object a distance of 4.0 meters

    asked by Joe Barrera on September 20, 2011
  75. physics

    why do cars have head rests?your answer should include the word ''force'' and ''velocity''

    asked by lisa on May 16, 2012
  76. Math

    Essay on a true hero is a unifying force in a diverse society ideas please

    asked by Anonymous on January 9, 2016
  77. Physics

    What is the gravitational force vetween 2 15-kg packages that are 35cm apart? What fraction is this of the weight of one package?

    asked by Tanveer on October 11, 2008
  78. Physics

    Calculate the force acting on a body of mass 10 kg moving with a uniform velocity of 2m/s.

    asked by Abidur on April 9, 2017
  79. physics

    the angle between two forces of 32 AND (neutrons) and 47 N is 36 degrees. Find the magnitude of the resultant force

    asked by jessica on September 19, 2014
  80. math

    If you separate the socks with equal charges 4 x10-9 C until they’re 7 cm apart, what force will each sock exert on the other?

    asked by Laura on March 3, 2014
  81. Physics

    if two objects each with a mass of 3.7x10^3 N produce a gravitational force between them of 4.8x10^-6 N. what is the distance between them?

    asked by Abby on March 6, 2019
  82. Physics

    Can you give me the summary of work,force,potential & kinetic energy,power?

    asked by Althea on December 5, 2013
  83. Science

    How could you keep an objects acceleration the same if the force acting on the object were doubled?? Can you answer in 5 sentences please

    asked by Itiel on April 28, 2011
  84. SCIENCE

    TWO FORCES 8N & 10N AT AN ANGLE OF 30' ACTING ON A PARTICLE WHAT IS RESULTANT FORCE AND IT'S DIRECTION.

    asked by BIHARI on August 1, 2016
  85. chemistry

    what type of intermolecular force describes the interaction between Ca2+ and Mg2+ with water?

    asked by Boyce on May 11, 2010
  86. science

    How fast can you accelerate a 20kg object if you push on it with 120 newton of force?

    asked by fgahigu on September 21, 2011
  87. physics

    What is the magnitude of the electrostatic force on a +5 C harge 1.75 m to the left of a -2.5 C Charge? (show your work)

    asked by Mandy on May 14, 2013
  88. physics

    define the term torque or moment of force. Give its units and dimensions

    asked by kanika on October 31, 2012
  89. Physic

    Calculate the mass of a bus if it produces o force of 14,000N while accelerating at a rate of 5 m/s^2

    asked by Sagar Chhetri on March 12, 2019
  90. Physics

    Find the force necessary to stop a 900 kg jetta traveling at +25 m/s in a time of 5.0 seconds.

    asked by Mariam on January 16, 2018
  91. Physics

    Two pellets, each with a charge of 0.80 microcoulomb (8.0×10−7 C ), are located 2.8 cm (2.8×10−2 m ) apart. Part A Find the electric force between them.

    asked by Jay on April 28, 2017
  92. math

    a 64.5 person steps off a 129 kg boat with a force of 34.0 N. which object will have the larger acceleration?

    asked by carol on October 18, 2013
  93. Physics HELP ME PLEASE

    A 1250 kg car increases it's speed from 11 m/s to 27 m/s in 5.4 s. - What is the cars acceleration? - How much force is required?

    asked by Jamika on June 2, 2014
  94. Physics

    Calculate the distance between the two proton such that the electrical repulsive force between them is equal to the weight of either

    asked by Ayushi on April 8, 2017
  95. physical Science

    How much force is required to give an object with mass of 20kg an acceleration of 12m/s2 ?

    asked by Casey on December 11, 2012
  96. mechanic

    Resolve a force of 100 n in to two compound of 200 n each drow sketch .solve this

    asked by Anonymous on September 12, 2016
  97. science

    Calculate net force when mass =2000kg, uniform velocity =60kg/hr

    asked by karan on November 7, 2015
  98. mechanics

    resolve a force of 120n acting at an angle of 30degree with respect to horrizontal.

    asked by krunal on July 28, 2012
  99. Physics

    What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?

    asked by George on November 2, 2010
  100. Physics/Charges

    Point charges Q1 = 50 µC and Q2 = -20 µC are placed 2 meters apart. Where can I put a third charge so that the net electrical force on it is zero?

    asked by Lindsey on February 4, 2013