1. Physics

    In a vacuum, two particles have charges of q1 and q2, where q1 = +3.7 µC. They are separated by a distance of 0.22 m, and particle 1 experiences an attractive force of 3.5 N. What is q2 (magnitude and sign)?

    asked by Dee on January 8, 2014
  2. physics

    A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.3 N acts on it for a distance of 0.5 m

    asked by Michelle on March 10, 2012
  3. Physics

    A 1200kg car accelreates from 0mph-60mph in 8.5 seconds. Calculate the force needed to accelerate the vehicle.

    asked by Alexis on January 28, 2013
  4. physics

    A 60kg boy is riding his bike to school. His acceleration is 15 m/sec^2. Determine the magnitude of the force he is exerting.

    asked by Laycee on January 31, 2012
  5. physics...damon please help

    Thirty microcoulombs of NEGATIVE charge experiences an electrostatic force of 27. mN. What is the magnitude and direction of the electric field?

    asked by Maranda on October 22, 2014
  6. physics

    A loaded truck can accelerate at 4.1 m/s 2 . It loses its load so that it is only 0.8 as massive. By what factor must the acceleration change for the same driving force?

    asked by Anonymous on December 8, 2012
  7. science

    a body isdisplacedthrougha certaindistance X by a forceof 30n. if the work done is 100 and the displacement isi in the directionof force . What is the value of x

    asked by franklin on January 21, 2019
  8. Physics

    Can someone help me with finding out the magnitude of the gravitational force a person with a mass of 67.5 kg would experience while standing on the surface of Earth? Thanx in advance.

    asked by Anonymous on November 16, 2008
  9. physics

    A loaded truck can accelerate at 6.4 m/s^2. It loses its load so that it is only 0.9 as massive. By what factor must the acceleration change for the same driving force?

    asked by brandon on March 2, 2011
  10. physics

    A loaded truck can accelerate at 6.4 m/s^2. It loses its load so that it is only 0.9 as massive. By what factor must the acceleration change for the same driving force?

    asked by brandon on March 2, 2011
  11. chemistry

    Picking any two compounds, how do you describe which one has a higher dispersion force using the words Larger electron cloud and polarizability? Thanks:)

    asked by Rebekah on March 4, 2011
  12. physics

    Three point charges are on the x axis: −2 ¦ÌC at −3 m, 8 ¦ÌC at the origin, and −10 ¦ÌC at 3 m. Find the force on the first charge. The value of the Coulomb constant is 8.98755 ¡Á 109 N ¡¤ m2/C2.

    asked by Anonymous on November 20, 2011
  13. Calculus

    Find the total work done by a 15 N force in the direction of the vector [1,2,2], when it moves a particle from O[0,0,0] to P[1,-3,4] and then from P to A[7,2,5]. Distance is measured in metres.

    asked by J on May 7, 2012
  14. physics

    Determine the force of interaction between 2 electric charges q1= 1x10-6 C and q2= 2x10-6 C at the distance r = 2 m. I think the formula is F=kq1*q2/r2? How do I find k?

    asked by physicsclass on April 23, 2011
  15. Physics

    What is the average braking force required of a 1200kg car in order for it to come to rest from 60km/h in a distance of 25m

    asked by Abdul on September 1, 2014
  16. physics

    a car that's 1000 kg is stopped and the brakes exert a force of 3000 N over a distance of 891 meter, how much work is done?

    asked by Anonymous on March 12, 2014
  17. physics

    How long would it take to bring a 318 kg car moving at 11.2 m/s to a complete stop if a 602.8 N breaking force is applied?

    asked by Anonymous on April 14, 2015
  18. physics

    A particle of mass 10 kg is slowly lifted up to a height of 10 metre then calculate the workdone by external and gravity force ?

    asked by shubham on October 9, 2014
  19. Calculus

    Find the total work done by a 15 N force in the direction of the vector [1,2,2], when it moves a particle from O[0,0,0] to P[1,-3,4] and then from P to A[7,2,5]. Distance is measured in metres.

    asked by J on May 8, 2012
  20. Math

    Find the work done by a 15 N force in the direction of the vector (1,2,2) when it moves a particle from O(0,0,0) to P(1,-3,4) and then from P to A(7,2,5) Can somebody explain to me how to do this question i don't understand it.

    asked by Christian on October 16, 2010
  21. Physics

    an object is pushed horizontally by a 0.0840-kiloN force over a frictionless table. find the resulting acceleration

    asked by Anonymous on November 10, 2013
  22. Science

    much force is Mike applying to the 1000 kg car to make it accelerate at a rate of .05 m/s2? I need help understanding this.. I'm really bad at science...>.

    asked by Chan on October 22, 2010
  23. physics

    calculate the force exerted on a rocket given that the propelling gases are expelled at a rate of 1000 kg/s with a speed of 60,000 m/s.

    asked by kalli sarik on January 31, 2011
  24. physics

    A 4.3kg object moves across a floor with a velocity of + 8.2 m/s and slides to rest in 5.8 s. The net force producing this acceleration is:

    asked by robbi on January 28, 2015
  25. physics

    a positive charge of 4x10^6c experiences a force of 2n acting to the right.what is the magnitude and direction of the eletric field at this point?

    asked by Anonymous on May 12, 2011
  26. Physics

    A student applies an upward force of 58 N to a 5.1-kg physics textbook. Find the book’s acceleration (positive for up, negative for down).

    asked by martin on February 25, 2011
  27. Physics

    A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.8 N acts on it for a distance of 0.5 m?

    asked by Tammy on November 8, 2013
  28. physics

    17. At what distance of separation, r, must two 5.87 x 10^-8 Coulomb charges be positioned in order for the repulsive force between them to be 64.9 N? You must show your work for credit

    asked by lula on March 16, 2019
  29. sarangz

    a bus weighing 50 tonnes moving with a velocity of 60km/hr.Calculate the force required to stop it in 10 seconds.

    asked by dev on July 10, 2016
  30. Calculus

    Three forces of 5 N, 8 N, and 10 N act from the corner of a cube along its edges. Using Cartesian vectors, find the magnitude of the resultant force.

    asked by J on May 7, 2012
  31. pysics

    three identical point charges each Q coulombs are placed at the vertices of an equilatwral triangle 20cm apart.calculate the force on each charge

    asked by emmanuel on March 25, 2017
  32. Air Table

    ... continued If momentum was lost in a momentu, vector diagram, it would be because not enough force was applied to the pucks on the air table?

    asked by Melanie on December 1, 2008
  33. physics 101

    50kg drops from a height of 2meters straight down with a force constant of 8 x 1000n/m. What maximum distance does she compress?

    asked by edmund on October 10, 2012
  34. physics

    10. How much current is required to produce a force of 0.96 N on a 75 cm long wire oriented at right angles to a 0.24 T magnetic field? A. 0.050 A B. 0.17 A C. 5.3 A D. 0.19 A 5.3 A (

    asked by sally on May 24, 2009
  35. fluid power

    assume that the input piston has an area of 4.25 inches squared with a force of 3150 pounds what is the pressure in the system

    asked by edward on September 13, 2012
  36. Physics

    What force is required to accelerate an object of 1.484x10^0 kg over a frictionless surface at -2.3580x10^0 m/s2 expressed to three significant figures.

    asked by dylan on October 22, 2010
  37. physics

    If you push a box a distance of 2,000 meters with a force of 1 newton, how many Calories have you used? 1 Calorie= 4,187 Joules

    asked by BrainyBird on November 13, 2013
  38. Calculus

    Three forces of 5 N, 8 N, and 10 N act from the corner of a cube along its edges. Using Cartesian vectors, find the magnitude of the resultant force.

    asked by J on May 6, 2012
  39. physics

    A car of mass 500kg and velocity=36km/h and suddenlybreak applied 150m calculate the force and work done?

    asked by Amar kumar on April 1, 2017
  40. Physics- Help

    Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

    asked by Mat on December 3, 2012
  41. Physics- Help

    Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

    asked by Mat on December 3, 2012
  42. physics

    what force is needed to accelerate at child on a sled at 1.4 meters per second square (total mass 55 kilo gram)

    asked by jessie on October 16, 2011
  43. Calculus

    Two forces, F1 and F2 act on an object and the angle between them is 60 degrees. Determine the magnitude and the direction of the resultant force FR relative to F1 if F1= 50 N and F2= 30 N.

    asked by Ariza on May 4, 2010
  44. Science

    if it takes 20 newtons to accelerate an object weighing 15 kg 0.1 meters per second squared to the west what is the force of kinetic friction?

    asked by Abby on November 25, 2010
  45. Science

    a body of mass 500g moving at 5m/s comes to rest after covering a distance of 5m.find the retarding force acting on it.

    asked by Sanjaytharan on August 31, 2016
  46. physics

    A 78-kg parachutist, in the first few seconds of her jump, accelerates at a rate of 7.4 m/s2 [down]. Calculate the force she experiences due to air resistance.

    asked by jake on July 9, 2013
  47. Physics

    Three particles have charges +20μC each.They are fixed at the corners of an equilateral triangle of side 0.5m .The force on each of particle has magnitude

    asked by Pooja on April 25, 2017
  48. Physics

    two equal charges exert an elecrtric force on each other of 0.0385 when positioned 0.15 apart determine the magnitude of the charge on each point.

    asked by Excelvia on November 26, 2012
  49. physics

    A 2.284 km car is moving down a road with a slope of 13% at a constant speed of 11 m/s. What is the direction and magnitude of the frictional force?

    asked by Brandon on February 25, 2014
  50. Physics

    A box with a mass of 10 kg slides along a horizontal surface. A force of 50 N is needed to keep it moving. What is the coefficient of kinetic friction?

    asked by ylopez on July 4, 2016
  51. Math

    Mass, m, is varies inversely as acceleration, a. The constant of variation is force,f. Write an equation to express this relationship.

    asked by M on April 15, 2015
  52. Physics

    What is gravitational force of a 65kg person that is on the surface of the moon has a mass of 7.348 x 10^22kg and radius of 1731km?

    asked by Tiffiany on January 18, 2011
  53. applied mechanics

    A force of 10N is needed to move a mass of 2kg resting on a table. Find the coefficient of friction. ( take g=9.8m/s)

    asked by david agom on December 3, 2015
  54. Physics-10

    A karate chop delivers a blow of 300N to a board that breaks. The force that acts on the hand during this event is?

    asked by Stanley on March 4, 2011
  55. Physics

    A 60 kg skier is coming down a hill that has an incline of 35°. If the force of friction between the ski and the snow is 6 N, how fast does the velocity change per second?

    asked by SA on February 20, 2019
  56. Kennard Dale

    Estimate what the value of G would need to be if you could actually "feel" yourself gravitationally attracted to someone near you. Assume that each person has a mass of 72 kg, the force of attraction is F = 4 N, and the distance of separation is 0.5 m.

    asked by Jake on October 28, 2010
  57. physics

    Thirty microcoulombs of NEGATIVE charge experiences an electrostatic force of 27. mN. What is the magnitude and direction of the electric field?

    asked by Maranda on October 21, 2014
  58. physical

    the ability to exert muscle force quickly is known as 1) agility 2) power 3) recation time 4) speed I need help! Plz anyone!

    asked by someone on December 18, 2013
  59. Chemistry

    Which property of gases best explains the ability of air bags to cushion the force of impact during a car accident?K

    asked by Kiley on October 14, 2012
  60. physics

    what change in velocity would be produced on a body of mass 4kg, if a contact force of 16N act on it for 2sec.

    asked by sanusi on August 27, 2016
  61. physics

    calculate the horizontal force that must be applied to produce an acceleration of 72 m/s^2 for a 0.034 kg punk on a friction less air table

    asked by danny on December 1, 2017
  62. physics

    what net force is required to bring a 1500kg car to rest from a speed of 100kph within a distance of acceleration.

    asked by zianna on August 2, 2012
  63. physics

    what net force is required to bring a 1500kg car to rest from a speed of 100kph within a distance of acceleration.

    asked by zianna on August 2, 2012
  64. Physics

    Why can you exert a greater force on the pedals of a bike if you pull up on the handlebars? Does it have anything to do with one of Newton's 3 laws? I'm not sure how to approach this question.

    asked by Anonymous on August 4, 2014
  65. physics

    What force should the woman in Figure 9.45 exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed.

    asked by Mohanad on March 26, 2014
  66. physics

    why is it that drivers place cement blocks and other heavy items in the trucks of their vehicles? (think of friction and normal force)

    asked by William on October 24, 2014
  67. Physics

    Given the masses of the sun and earth are 1.99x10^30 kg and 5.98x10^24 kg respectively. Calculate the gravitational force between them when their centers are 1.50x10^11m apart

    asked by Yasmin on September 23, 2016
  68. Physics

    If a car is travelling with a constant speed of 5.53 m/s in the Westward direction, what is the resultant force acting on it? Ignore friction

    asked by Logan on September 1, 2011
  69. Physics

    Force acting on conductor when placed in magnetic field from east to west horizontal component is 3.0 and current is 10A

    asked by Anonymous on September 16, 2014
  70. Physics

    A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?

    asked by Maria on October 1, 2012
  71. Dynamics

    A particle is attached to point O from A by the force F=-k/x3. If x=x0 and v=0 when t=0, determine velocity and acceleration as a function of x, and the time it takes to travel from A to O.

    asked by Dynamics Problems on July 19, 2014
  72. phys101

    if the stress strai graph is a straight line,how much does the bar srtetch when applied force is increased by 50000N?

    asked by kabelo on April 9, 2010
  73. PHYSICS(HELP)

    Eight charges (50μC each) are arranged on the corners of a cube side length 1 cm. What is the magnitude of the force on each charge in Newtons?

    asked by Anonymous on January 20, 2014
  74. physics

    a box of treasure with a mass of 92 kg and volume of 0.031metrecubic lies at the bottom of the ocean.how much force is needed to lift it?

    asked by joelinho on June 15, 2014
  75. Physics

    Two objects attract each other gravitionally with a force of 2.5 *10^-10 N when they are .25m apart. Their total mass is 4.0kg. Find their individual masses.

    asked by Emily Grossman on February 22, 2011
  76. physics

    A student applies an upward force of 49 N to a 5.4-kg physics textbook. Find the book’s acceleration (positive for up, negative for down).

    asked by Fred on February 8, 2011
  77. Business Studies

    The "Baby Boomers" are nearing retirement age. What affect might this have on the productive capacity of a country's labour force?

    asked by CrissyXD on February 9, 2012
  78. Physics

    What is the magnitude of buoyant force acting on a 720 cm^3 toy submarine floating in fresh water? (D_water =1 g/cm^3)

    asked by Tracy on March 3, 2012
  79. Physics

    A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?

    asked by Maria on October 1, 2012
  80. Physics

    A 20,000 kg vehicle is running at 80km/hr in a rotonda with a radius of curvature 25m compute for the centripetal force

    asked by Dulce on September 29, 2014
  81. physics

    Five forces act on an object: (1) 60.0 N at 90°, (2) 40 N at 0°, (3) 80 N at 270°, (4) 40 N at 180°, (5) 50 N at 60°. What are the magnitude and direction of a sixth force that would produce equilibrium

    asked by jon on March 14, 2011
  82. Physics

    Three point charges are on the x axis: −6 µC at −3 m, 7 µC at the origin, and −5 µC at 3 m. Find the force on the first charge. The value of the Coulomb constant is 8.98755 × 10^9 N · m^2/C^2.

    asked by Alyssa on January 15, 2013
  83. physics

    As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 its mass is 0.145. A) What is the baseballs acceleration in m/s^2 and in g's? B) What is the size of force acting on it?

    asked by Ralph on June 21, 2011
  84. Physics

    How much time is needed to completely stop a 1600 kg car moving at 35 m/s if an average force of 4200 n is applied?

    asked by Maya on January 6, 2011
  85. Physics

    Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 83 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

    asked by Lexie on December 15, 2012
  86. physics

    A loaded truck can accelerate at 4.8 m/s2. It loses its load so that it is only 0.4 as massive. By what factor must the acceleration change for the same driving force?

    asked by Anonymous on October 18, 2012
  87. Physics

    What gravitational force do yhe two protons in the helium nucleus exert on each other? There separation is approximately 1.0 fm. I know that 1 fm is 10^-15 m i didn't know if that was how you figured it out to get it to N?

    asked by Sarah on June 15, 2009
  88. PHYSICS

    a swimmer develops an average of 200 watts in a distance of 100m in 80 seconds. what is the force resistance in the water?

    asked by Nolan on July 12, 2014
  89. Physics

    Calculate the resultant force acting on body of mass 10kg moving with uniform velocity of 2 meter per second

    asked by Aashiq on June 12, 2018
  90. Science

    Archimedes' principle states that the buoyant force on an object is equal to the density of the fluid it displaces. true?

    asked by :) on February 5, 2014
  91. Physics

    Why would normal force be set to zero to calculate the minimum possible speed a rider can have at the top of a loop. Please i need help, this is due in few hours

    asked by Ted on April 18, 2013
  92. Physics

    A wagon was used to move a 90 lb rock 120 yds. It took 40 sec and 70 lbs of force. Can someone help me solve for efficiency and horsepower????? PLEASE :)

    asked by Heather on December 11, 2007
  93. 7th science

    Does a force act on a if moves at a constant speed while turning? Is the answer kinetic. if so please explain how it relates to Newton,s

    asked by renesmae on January 21, 2012
  94. Physics

    A 0.5kg puck traveling in a horizontal circle of radius 3.2m has a frequency of 0.5Hz. what is the centripetal force on the cord?

    asked by Nathan on April 2, 2012
  95. Physics, Class XI

    If a force of 15 kg. weight acts on a mass of 14 kg, what will be its velocity after 8 seconds? What is the process to apply the formulas in this question? Please help me fast!

    asked by Ritu on November 25, 2016
  96. physics

    what is the force required to start moving a 25kg box across a concrete floor with a coefficient of static friction of .65?

    asked by april on November 29, 2009
  97. Physics

    A 26-lb. force vector that makes an angle of 101° counterclockwise from the -y direction. Determine the x and y components of the following three vectors in the xy plane.

    asked by Cristiano on January 17, 2016
  98. physics

    Eight charges (50μC each) are arranged on the corners of a cube side length 1 cm. What is the magnitude of the force on each charge in Newtons?

    asked by Anonymous on January 20, 2014
  99. phys101

    if the stress strai graph is a straight line,how much does the bar srtetch when applied force is increased by 50000N?

    asked by kabelo on April 9, 2010
  100. physics

    what is the coefficient of kinetic friction between a 2kg brick and concrete if it takes 9.0N of force to move it at a constant rate?

    asked by april on November 29, 2009