1. statics

    a bench is 2.4m long.the legs are attached .3m from each end.if 3 boys weighing 500n,750n,1000n seated.4,1.2m,2m from end of the bench,what force must eachset of leg exert

    asked by pion on September 8, 2015
  2. physics

    A balloon rubbed against denim gains a charge of -8.45µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 4.7cm? (Assume the charges are located at a point)

    asked by marcus on February 21, 2018
  3. Physics - Dynamics

    (ZYX)If the coefficient of friction is 0.85 for a 2500 kg car against asphalt, then what applied horizontal friction force would be necessary to decelerate the car at 6.0 m/s^2? Also, what would be the stopping distance if the vehicles original speed is 25

    asked by Nathan on June 12, 2015
  4. physics

    What is the net upward force on an airplane wing of area 20.1 m2 if the speed of air flow is 302 m/s across the top of the wing and 287 m/s across the bottom? (assume the density of air is 1.29 kg/m3)

    asked by Anonymous on December 3, 2009
  5. physics

    A box weighing 100 newtons is pushed up an inclined plane that is 5 meters long. It takes a force of 75 newtons to push it to the top,which has a height of 3 meters. What is the efficiency?

    asked by chris on October 14, 2008
  6. Physics

    A dike in Holland springs a leak through a hole of area 0.80 cm2 at a depth of 1.2 m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak?

    asked by dave on October 6, 2016
  7. PHYICAL

    Awoman of 75kg skis down a 50m high hill , the frictional force is not negligible her speed at the bottom of the hill is only 25m\sec, What is the work done by the frictional forces

    asked by bbbb on July 8, 2012
  8. PHYICAL

    Awoman of 75kg skis down a 50m high hill , the frictional force is not negligible her speed at the bottom of the hill is only 25m\sec, What is the work done by the frictional forces.

    asked by bbbb on July 8, 2012
  9. g.k.

    A. A car is traveling at a speed of 55 mi/hr along a banked highway having a radius of curvature of 500 ft. At what angle should the road be banked in order that a zero friction force is needed for the car to go around this curve?

    asked by anirudh dhiman on April 18, 2012
  10. Physics

    Mike pulls a 4.5 kg sled across level snow with a force of 250 N along a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.8 m, how much work does Mike do? please show steps/equation!

    asked by Zach G on January 23, 2012
  11. science

    A hydraulic jack is needed to raise an object with a force of 4000 N to a height of 3 metres above the ground. Will the jack do the job? (Answer after working through the rest of the question. I would really appreciate it if someone would please help me

    asked by Cherie on April 9, 2013
  12. Physics

    A skier of weight 700N is pulled at constant speed up a smooth slope, of inclination 15 degrees, by a force of magnitude P N acting at 25 degrees upwards from the slope. Find the value of P.

    asked by Laura on October 5, 2010
  13. PHYICAL

    Awoman of 75kg skis down a 50m high hill , the frictional force is not negligible her speed at the bottom of the hill is only 25m\sec, What is the work done by the frictional forces.

    asked by a b on July 8, 2012
  14. FLUID MECHANICS

    An inclined triangular plate is held in water with the base at the surface.Base=4m an height=6m.The inclination of the plate to the horizontal is 60.Find the resultant force and the center of pressure.

    asked by michael on November 18, 2011
  15. Physics

    Suppose the roller coaster in Fig. 6-41 (h1 = 30 m, h2 = 11 m, h3 = 20) passes point 1 with a speed of 2.10 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point 2? The distance traveled is 50.0 m.

    asked by Brittney on April 15, 2011
  16. Physics

    A bullet of mass 0.03kg enters a block of wood with a velocity of 600m/s and penrets to the depth of 0.02m.calculate the average force of the wood to the penetration of the bullet

    asked by Banu on August 10, 2017
  17. College Physics

    A 1200-kg car going 30 m/s applies its brakes and skids to rest. If the friction force between the sliding tires and the pavement is 6000 N, how far does the car skid before coming to rest? Can you help me get the formula to use . Thanks

    asked by edwin on February 11, 2010
  18. physics

    calculate horizontal force that must be applied to 1kg to make 6ounce to make it accelerat on horizontal friction three hour table dropped with same acceleration it would have if it and feel freely

    asked by tina on October 11, 2011
  19. physics

    A 350N box is pulled along a horizontal pathway by a rope which makes an angle of 42degrees with the pathway. If a force of 250N is applied on the rope, what is the coefficient of sliding friction?

    asked by b on October 9, 2016
  20. PHYICAL

    Awoman of 75kg skis down a 50m high hill , the frictional force is not negligible her speed at the bottom of the hill is only 25m\sec, What is the work done by the frictional forces

    asked by ale on July 8, 2012
  21. Physics

    A circular metal wire, with a radius of 0.5 mm, has a force of 2 kN applied along it. If the wire has an unstressed length of 3 m and stretches by 8 mm, what is Young’s Modulus for the metal? Give your answer in GPa. Any help would be very appreciated

    asked by Adam on August 5, 2017
  22. Physics

    You exert a 100-N pull on the end of a spring. When you increase the force by 20% to 120 N, the spring's length increases 4.0cm beyond its original stretched position. What is the spring constant of the spring?

    asked by BULTURP on March 10, 2014
  23. physics

    starting from rest,a 5.20 kg block slides 3.20 m down a rough 30 degrees incline. The coefficient of kinetic friction between the block and the incline is k=0.436. (a)determine the work done by the normal force

    asked by tshimologo on February 12, 2018
  24. Physics

    3. A 2000 kg sports car moves in a horizontal circular path of 150 m\radius at a constant speed of 80 m\s. a. magnitude of centripetal acceleration b. magnitude of centripetal force

    asked by Shannon on October 23, 2012
  25. fisics

    a storage tank containing H2O is connected to an output of 6 ft in diameter. a circular plug is used to seal the tank. dtermine the address and location of the force on the cap scale h2o

    asked by carlos on September 1, 2015
  26. physics

    In a head-on collision, a car stops in 0.11 s from a speed of 23 m/s. The driver has a mass of 87 kg , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second?

    asked by Malik on January 13, 2012
  27. physics

    (a) What is the gravitational potential energy of a two-particle system with masses 5.4 kg and 5.0 kg, if they are separated by 1.3 m? If you triple the separation between the particles, how much work is done (b) by the gravitational force between the

    asked by kelly on January 3, 2011
  28. Physics

    Near the equator, the Earth's magnetic field point almost horizontally to the north and has a magnitude of B = 50 micro T. What should be the magnitude and direction for the velocity of an electron if its weight is to be exactly balanced by the magnetic

    asked by Ri on November 16, 2010
  29. PHYICAL

    A 100 N block is on rough horizontal surface. If a horizontal force F=40 N is applied and the block just start slide. What is the value of the static coefficient. My dear sir please help me in teaching my son and thank you very much

    asked by bbbb on July 8, 2012
  30. PHYICAL

    Awoman of 75kg skis down a 50m high hill , the frictional force is not negligible her speed at the bottom of the hill is only 25m\sec, What is the work done by the frictional forces.

    asked by alex on July 8, 2012
  31. physics for scientists and engeneers I

    Suppose the roller coaster in the figure (h1 = 40 m, h2 = 14 m, h3 = 30) passes point A with a speed of 2.60 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point B? The distance traveled is 35.0 m.

    asked by Johnathon on February 16, 2011
  32. 11th grade physics

    An electron is placed in a vertical electric field directed upward and of intensity E=5v/m. Compare the weight of the electron to the electrostatic force to which it is submitted. Deduce. Gravitational field strength: g=9.8m/s^2 Thanks.

    asked by angy on March 31, 2016
  33. PHYSICS ---HELP!

    A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

    asked by Leila on October 6, 2010
  34. physics

    The position of a toy locomotive moving on a straight track along the x-axis is given by the equation x = t 4 − 6 t 2 + 9 t , where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to Answer in units of

    asked by Anonymous on September 30, 2013
  35. Phys

    Charged particles #1 and #2 are 0.4 cm apart in air and exert a 100 Nt on force each other. If the 2 charges (at the same distance) exert a 25 Nt for on each other in substance "blox", then "blox" has a dielectric constant of: 0, 4, 2, 2500, more info

    asked by Lynn on February 5, 2011
  36. physics

    A 150 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 420 N. For the first 21 m the floor is frictionless, and for the next 21 m the coefficient of friction is 0.30. What is the final speed of the crate?

    asked by Anonymous on November 8, 2009
  37. physics

    A 120 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

    asked by Kim on October 4, 2010
  38. Physics

    A worker pushing a 35.0-kg wooden crate at a constant speed for 13.7 m along a wood floor does 390 J of work applying a constant horizontal force of magnitude F0 on the crate.Determine the value for F0.

    asked by raj on November 21, 2011
  39. physics

    A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 420 N. For the first 13 m the floor is frictionless, and for the next 13 m the coefficient of friction is 0.35. What is the final speed of the crate?

    asked by Cara on April 6, 2011
  40. General Physics

    A 0.40 - kg object connected to light spring with a force constant of 19.6 N/m oscillates on a frictionless horizontal surface. If the spring is released from rest, determine the maximum speed of the object.

    asked by Ellen on November 12, 2009
  41. physics homework

    a hockey puck of mass 0.05kg sliding on the ice with velocity 20m/s is stopped by a goalie in 0.10sec. what is the magnitude and direction of the force exerted by the goalie on the puck.

    asked by ama bankye on November 13, 2010
  42. phyics

    The position of a 2.75 *10^5 N training helicopter under test is given by r = (0.020 m/s^3)(t^3)i + (2.2 m/s)(t)j - (0.060 m/s^2)(t^2) k Find the net force on the helicopter at t =5.0s. Express your answer in terms of i,j,k. Express your coefficient using

    asked by ami on September 16, 2010
  43. physics

    As a 2.0-kg object moves from (2i+5j)m to (6i-2j)m, the constant resultant force acting on it is equal to (4i-3j)N. If the speed of the object at the initial position is 4.0 m/s, what is its kinetic energy at its final position? Ans: 40J

    asked by ATT on March 31, 2018
  44. Physics

    A wire of 5.0m and diameter 2.0mm,extends by 0.25mm when a force of 50N was stretch it from it's end calculate a.the stress on the wire. b.the strain in the wire. c.the young's modulus of elasticity of the wire

    asked by Testimony on June 10, 2018
  45. PHYSICS

    A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 450 N. For the first 11 m the floor is frictionless, and for the next 11 m the coefficient of friction is 0.30. What is the final speed of the crate?

    asked by REESE on March 17, 2010
  46. Physics

    A spaceship of mass m is located between two planets of masses M1 and M2; the distance between the two planets is L. Assume that L is much larger that the radius of either planet. What is the position of the spacecraft (given as a function of L, M1, and

    asked by Fernando on April 28, 2011
  47. PHYSICS

    A jet flying at 135 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, and the mass of the jet is 1.82*10^5 kg. Calculate the magnitude of the necessary lifting force.

    asked by JULIA on October 5, 2010
  48. physics

    A 1.03 kg mass is attached to a spring of force constant 10.6 N/cm and placed on a frictionless surface. By how much will the spring stretch if the mass moves along a circular path of radius 0.525 m at a rate of 2.20 revolutions per second?

    asked by Jamie on March 18, 2013
  49. Physics

    A 1.7 kg otter starts from rest at the top of a muddy incline 89.2 cm long and slides down to the bottom in 0.60 s. What net external force acts on the otter along the incline? Answer in units of N

    asked by Ryan on November 14, 2011
  50. Physics

    While undergoing fission, a uranium-235 nucleus with its 92 protons splits into two smaller nuclei each of which contains 46 protons and has a radius of 5.90 x 10^-15m. What is the magnitude of the repulsive force between the two nuclei just after the

    asked by Pauline on March 7, 2011
  51. Physics URGENT!!!

    Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. (a1) Determine the acceleration of the boxes (b) the tension of

    asked by Anonymous on September 30, 2012
  52. Physics

    Doubling the voltage across a parallel plate capacitor does not double which of the following? a. the charge b. the electric field between the plates c. the energy stored d. the electric force on the plates e. both a and b is the answer A if not then how

    asked by Anthony on February 24, 2011
  53. Physics

    The position of a toy locomotive moving on a straight track along the x-axis is given by the equation: x=t^4-6t^2+9t where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to Answer in units of s.

    asked by Jonathan on September 27, 2013
  54. physics

    A block is pulled across the floor by a pull of 400 N at an angle of 35˚ with the horizontal. The force of the kinetic friction is 150 N, and the block is moved a horizontal distance of 23 m. What is the resultant work?

    asked by rahul patel on March 31, 2012
  55. Calc

    A particle starts at the point (−3, 0), moves along the x-axis to (3, 0), and then along the semicircle y = sqrt(9 − x^2) to the starting point. Use Green's Theorem to find the work done on this particle by the force field F(x, y) = .

    asked by Taylor on November 8, 2016
  56. Physics

    Doubling the voltage across a parallel plate capacitor does not double which of the following? a. the charge b. the electric field between the plates c. the energy stored d. the electric force on the plates e. both a and b is the answer A if not then how

    asked by David on February 23, 2011
  57. Physics of Vehichle

    A 1400 kg car rounds a curve of 57 m banked at an angle of 14 degrees If the car is traveling at 98 km/h, will a friction force be required? If so, in what direction? May someone please walk me through this problem step by step? Thank you

    asked by Mike Joseph on June 16, 2012
  58. Physics

    A dike in Holland springs a leak through a hole of area 0.80 cm2 at a depth of 1.4 m below the water surface.How much force must a boy apply to the hole with his thumb to stop the leak? Could he do it?

    asked by Ayla on November 5, 2016
  59. Impact force

    A 65.0 kg professional diver performs a dive from a platform 10 m above the water surface. Find the average impact force she experiences in her collision with the water if the collision lasts for 0.800 s.

    asked by Anonymous on October 21, 2012
  60. Physics

    Two blocks, the first with a mass of 30 kg, and the second 10kg, are connected by a string and pulled accross a frictionless surface by a force with a magnitude of 75 N. Find the magnitude of the tension acting along the string that connects them.

    asked by Karrie on January 28, 2012
  61. Physics

    Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 15 kg and m2 = 17 kg. A force of 58 N is applied to the 17 kg box. (a1) Determine the acceleration of the boxes (b) the tension of

    asked by Anonymous on September 30, 2012
  62. Physics

    A sample of blood is placed in a centrifuge of radius 20.0 cm. The mass of a red blood cell is 3.0 10−16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 10−11 N. At how many revolutions per second should the

    asked by Allie on October 6, 2011
  63. Physics

    A 1.5 kg otter starts from rest at the top of a muddy incline 80.2 cm long and slides down to the bottom in 0.40 s. What net external force acts on the otter along the incline? Answer in units of N

    asked by Cass on October 22, 2014
  64. True or False?

    Sounds like an easy question but I just wanna be sure! :P Tides are caused by the force of inertia from the sun and moon acting on Earth. True or False? I think its false because its gravity not inertia.

    asked by Bella on January 19, 2015
  65. physics

    A 1.6 kg otter starts from rest at the top of a muddy incline 95.9 cm long and slides down to the bottom in 0.50 s. What net external force acts on the otter along the incline? Answer in units of N

    asked by scott on November 3, 2012
  66. physics

    Bruce the Shark, is swimming very fast, at a constant velocity of 5 m/s. Bruce has a mass of 738 kg and is able to generate a force of 15 N with his tail. Calculate the pmomentum, in kg*m/s of this large shark. answer please

    asked by Anonymous on April 8, 2018
  67. physics

    Bruce the Shark, is swimming very fast, at a constant velocity of 8 m/s. Bruce has a mass of 831 kg and is able to generate a force of 15 N with his tail. Calculate the pmomentum, in kg*m/s of this large shark. answer please

    asked by Zach on March 30, 2018
  68. jokens

    A sphere with a charge of 1.5 x 10-6 C experiences a force of 3.5 x 102 N when it is located at a certain point in an electric field. Determine the magnitude of the electric field intensity at this location. (remember E = Fon q' / q', and 1 µC = 1.00 x

    asked by Anonymous on September 18, 2014
  69. physics

    water leaves a hose at a rate of 1.5kg/s with a speed of 20m/s and is aimed at the side of a car, which stops it (splashing back is ignored). what is the force exerted by the water on the car?

    asked by zianna on August 28, 2012
  70. physics

    A proton moves perpendicularly to a mag- netic field that has a magnitude of 3.09×10^−2 T. The charge on a proton is 1.60×10−19 C. What is the speed of the particle if the magnitude of the magnetic force on it is 3.50*10^−14N? Answer in units of

    asked by maria on April 19, 2011
  71. physivs

    a body of mass o.1 kg is attached to a spring and placed on a horizontal frictionless table. the spring is stretched 20cm,when a force of 5N is applied .what will be the period of oscillation when the mass is set in motion?

    asked by komal on December 31, 2014
  72. physics

    consider the arrangement of four +20 microCouloumb point charges located at all 4 corners of a square with 30cm sides. calculate the magnitude and direction for the force on each charge due to the other 3 point charges.

    asked by gipi on June 2, 2015
  73. physics

    a force of 400 N at an angle of 15 degrees above horizontal is needed to pull a 180 kg trunk across the floor at constant speed. what is the coefficient of kinetic friction between the trunk and the floor

    asked by Anonymous on December 11, 2016
  74. physics

    charges of +2uc,+3uc,and -8uc are placed at the vertices of an equilateral triangle of side 10cm. calculate the magnitude of the force acting on the -8uc charge due to the other two charges.?

    asked by poppy on April 26, 2019
  75. physics

    A proton moves perpendicularly to a mag- netic field that has a magnitude of 3.09×10^−2 T. The charge on a proton is 1.60×10−19 C. What is the speed of the particle if the magnitude of the magnetic force on it is 3.50*10^−14N? Answer in units of

    asked by maria on April 19, 2011
  76. Physics

    A force of 400 N at an angle of 15 degrees above the horizontal is needed to pull a 180 kg trunk across the floor at constant speed. What is the coefficient of kinetic friction between the trunk and the floor?

    asked by Anonymous on December 11, 2016
  77. Physics

    A block of mass 4.6 kg slides 15 m from rest down an inclined plane making an angle of 20 o with the horizontal. If the block takes 10 s to slide down the plane, what is the retarding force due to friction?

    asked by Steve on February 21, 2012
  78. Physics

    Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 720 N, and his speed at the bottom of the pole is 3.8 m/s. How far did he slide down the pole?

    asked by Shannon on November 16, 2010
  79. physics

    A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

    asked by josh on October 5, 2010
  80. physics

    A 5kg block is placed on an inclined plane raised to an angle with it just started to slip down. if its coefficients of friction is 0.3 calculate. and the speed of the block up to the plane if it is being pull up by a force of 30N

    asked by holamyde on December 29, 2014
  81. physics

    A small cork with an excess charge of +5.0 ¦ÌC is placed 0.14 m from another cork, which carries a charge of −3.2 ¦ÌC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 ¡Á 109 N ¡¤ m2/C2. Answer in

    asked by jenny on April 19, 2012
  82. Physics

    in the moments before you hit a truck, you decide to calculate the impulsive force (impulse) you will feel. you and your bike have a combined mass of 120kg and the truck brings you to a halt in 0.3s. What is your impulse?

    asked by Mariya on April 6, 2013
  83. physics

    Calculate the resultant force when four forces of 30N due east 20N due north 50N due West and 40N due south are acted upon a body

    asked by Suraj on September 18, 2016
  84. Physics

    A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

    asked by amanda on October 5, 2010
  85. Physics

    a 981 kg test car travels around a circular track with a radius of 0.625 km. if the magnitude of centripetal force is 2433, what is the cars speed? what is the cars centripetal acceleration?

    asked by Alejandro on November 25, 2014
  86. SCIENCE

    an athletic hold the a 75 kg shot up in his hand with his lower arm horizontal. his lower arm has mass of 2.8 kg and it center of gravity and is 12 cm from the elbow-joint pivot. how much force must be exerted

    asked by SANDILE on October 29, 2018
  87. statics

    a bench is 2.4m long.the legs are attached .3m from each end.if 3 boys weighing 500n,750n,1000n seated.4,1.2m,2m from end of the bench,what force must eachset of leg exert

    asked by pion on September 9, 2015
  88. physics

    A uniform metre rule of mass 150g is pivoted freely at 0 cm mark.What force applied vertically upwards at the 60 cm mark is needed to maintain the rule horizontally?

    asked by Criticos on February 22, 2019
  89. Physics

    For the harmonic potential V(x,y) = x^2 + y^2 a)Find the total differential, dV. b) Show that dV is exact c) Given that -dV = Fx.dx + Fy.dy where Fx and Fy is the force in the x and y direction, respectively, write a differential equation describing the

    asked by Beth on November 14, 2008
  90. science

    14. A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the radius of the curve?

    asked by Anonymous on May 22, 2016
  91. Physics

    A 29 kg sign is supported by a vertical chain at each end. A strong wind blows and the chains make a 30 degree angle with the vertical. What force does each chain exert? Thank you for answering~

    asked by Anonymous on September 17, 2011
  92. Physics

    A 3 kg block is being pulled by a string at a constant speed on a surface with a coefficient of kinetic friction of 0.3. If the string is at an angle of 30 degrees with the horizontal, what is the magnitude of the force necessary to pull the block?

    asked by Megan on June 30, 2011
  93. science

    a car is used to move a crest of mass of 645kg on a horizontal road the horizontal force exerted is 15000n the coefficient of kinetic friction is 0.8 calculate the acceleration of the car

    asked by refilwe on March 14, 2017
  94. Physics

    A skier of weight 700N is pulled at constant speed up a smooth slope, of inclination 15 degrees, by a force of magnitude P N acting at 25 degrees upwards from the slope. Find the value of P.

    asked by Laura on October 5, 2010
  95. Physics

    A 1.9 kg otter starts from rest at the top of a muddy incline 84.1 cm long and slides down to the bottom in 0.60 s. What net external force acts on the otter along the incline? Answer in units of N.

    asked by Michael on January 10, 2011
  96. physics

    A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate?

    asked by Kim on October 5, 2010
  97. physics

    water leaves a hose at a rate of 1.5kg/s with a speed of 20m/s and is aimed at the side of a car, which stops it (splashing back is ignored). what is the force exerted by the water on the car?

    asked by Carl on August 28, 2012
  98. physics

    a 60 kilogram student sitting on a hardwood floor accelerates at 1.3 meters per second squared when pulled by a 240 newton horizontal force. what is the coefficient of friction between the student and the floor?

    asked by bob on November 21, 2010
  99. Physics

    Al the astronaut has a weight of 1600 N when he is standing on the surface of earth. What is the force of gravity action on him when he is in space station orbiting earth at a distance of four earth radii from the center of the earth?

    asked by Beth on October 14, 2016
  100. algebra word problem

    A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second.1) write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. 2) Find the height (in

    asked by Anneliese on January 6, 2017