1. physics

    A car of mass 600 kg is travelling at 10m/s. when brakes are applied, it comes to rest in 10 M. what is the average force exerted by the brakes?

    asked by Farah on March 1, 2010
  2. physics

    calculate the acceleration if you push with a 20n horizontal force on a 3 kg block on a horizontal friction-free air table

    asked by Anonymous on October 2, 2011
  3. physics

    A 10,000 kg frieight car is rolling along a track at 3.0 m/s. Calculate the time needed for a force of 1000 N to stop the car.

    asked by michaela on April 22, 2010
  4. Physics

    A car travels around a curve banked at 45 degrees at 30 m/s. The radius of the track is 40m. What is the resultant force on the driver of the car?

    asked by Jody on January 7, 2015
  5. physics

    A car of mass 1200kg travelling @ 72 km/h is brought to rest in 4s.Find a) the average deceleration b)the average braking force

    asked by Luc on August 3, 2011
  6. Physics

    Initially sliding with a speed of 2.3 m/s , a 1.8 kg block collides with a spring and compresses it 0.36 m before coming to rest. WHat is the force constant of the spring?

    asked by Jason on November 3, 2010
  7. physical

    An airplane travels 80 m/s as it makes a horizontal circular turn which has a 0.8 km radius. What is the magnitude of the resultant force on the 75 kg pilot of this airplane?

    asked by yusra on April 18, 2010
  8. physics

    Two identical 1.60 {\rm kg} masses are pressed against opposite ends of a spring of force constant 1.85 {\rm N}/{\rm cm}, compressing the spring by 25.0 {\rm cm} from its normal length.

    asked by Anonymous on December 23, 2011
  9. Physics

    The two pistons in a hydraulic lift have radii of 2.67 cm and 20.00 cm respectively. What force must be applied to the 2.67 cm piston so that a 2.0 x 103 kg mass resting on the 20.0 cm piston is lifted?

    asked by Tiffani on March 31, 2014
  10. Physics

    A body of mass 3 kg experiences a force F=(2i +2j) N. If its initial velocity v=( -8i + 4j) m/s, then the time at which it will have a velocity just along the y-axis is ? (The expressions contain vector notations above them)

    asked by Clandestine on March 31, 2013
  11. physics

    two objects attract each other gravitationally with a force of 2.5^-10N.when they are 0.25m apart. Their total mass is 4.00kg. Find the individual mass?

    asked by rdw on March 30, 2014
  12. Physics

    What pressure is exerted by the tip a nail struck with a Force of 20,000N? Assume the tip is a 1.5mm-radius circle.

    asked by Sandra on April 1, 2014
  13. Physics - Vectors/Forces

    A 10 kg weight is on an inclined plane 10 ft long and 6 ft high. If there is no friction, what force parallel to the plane will prevent the body from sliding?

    asked by Demitrio on July 15, 2017
  14. chemistry

    Identify each of the ff reactions and say wha type of diving force for this.(a) chlorine+sodium iodin=2sodium chloride+iodin

    asked by Anonymous on September 29, 2014
  15. Physics

    Calculate the force of the Earths gravity on a spacecraft 12,800 km (2 earth radii) above the Earths surface if its mass is 1350 kg?

    asked by Mr. McKee on June 14, 2012
  16. Physics 103

    So I have a question about magnetism. A charged particle moves through a region of space and experiences no magnetic force. Does that mean that the magnetic field is zero?

    asked by Kate on March 2, 2010
  17. Mechanics - physics

    A car of mass 400kg moving initial at 36km/h increases to 120km/h in 6sec, what is the force acting on the car?

    asked by Precious on January 4, 2013
  18. physics

    A railroad car with a mass of 2000kg is rolling at a speed of 15m/s. What force would be required to stop the car in 10 seconds?

    asked by Tcrowder on March 21, 2013
  19. college physics

    A 1.2-kg piece of cheese is placed on a vertical spring of negligible mass and a force constant 1800 N/m. What is the length of compression of the spring?

    asked by khent on February 15, 2011
  20. Science

    check answer please. An object is pulled with 3 forces: 1 at 20n to the right another at 40n to the right and the third at 30n to the left. The net force is 30n to right

    asked by Sue on August 27, 2012
  21. physics, math

    A hot air balloon with a mass of 18.0 kg is accelerating upward at 1.80 m/s^2 (Anet = 1.80 m/s^2). What is the weight and buoyant force acting on the balloon?

    asked by Sarah on November 1, 2014
  22. Physics

    Initially sliding with a speed of 2.5 m/s, a 2.0 kg block collides with a spring and compresses it 0.35 m before coming to rest. What is the force constant of the spring?

    asked by Caleb on December 30, 2014
  23. physics

    My car is accelerating from o to 60 km/hr in 3.2 seconds. if the mass of my car is 2450kg and the froce of friction is 30 N, what is the force produced by my cars engine

    asked by Anonymous on February 16, 2011
  24. Physics

    An applied force of 50 N at an angle of 47.5 degrees up of East is applied to a 7.25 kg crate. Find the coefficient of friction if acceleration is 3.0 m/s/s E. a. 0.28 b. 0.42 (I know this one is wrong) c. 0.56 d. 0.35 e. 0.49

    asked by Sarah on April 19, 2010
  25. physics - - -

    A 12.0g bullet is accelerating from rest to a speed of 700m/s as it travels 20.0cm in a gun barrel. How large is it's accelerating force ?

    asked by Reema on November 2, 2010
  26. physics

    A highway is being constructed to accommodate traffic for speeds of 22.8 m/s. If the angle of the bank is 6.28° and there is no friction force, what is the highway's curve radius?

    asked by abdul on October 24, 2016
  27. Physics - Buoyant Force Question

    Find the buoyant force on a helium balloon in air (Standard Pressure and Temperature) if the balloon is spherical with diameter 12.0 cm.

    asked by Anon on November 11, 2016
  28. physics

    A 7.6 kg chair is pushed across a frictionless floor with a force of 42 N that is applied at an angle of 22° downward from the horizontal. What is the magnitude of the acceleration of the chair?

    asked by aly on December 2, 2010
  29. Physics - Another Question

    "Three forces act at a single point. Two of the forces are 39N southwest and 45N north. What is the value of the third force that creates equilibrium?"

    asked by Stuck on July 28, 2010
  30. Science/Biomaterials

    Hooke's law relates the amount of strain a material to the absolute amount of force applied. True or False?

    asked by James on June 5, 2012
  31. Banked Curves

    A 1200 kg car rounds a curve of radius 70m with a banking of 12°. The car is traveling 90 km/h, will a frictional force be required? If so, how much?

    asked by Yinka on October 9, 2018
  32. physics

    The net external force on a cart is N north. If the cart has a total mass of 220 kg, What are the magnitude and direction of its acceleration?

    asked by Dulce on July 9, 2014
  33. science

    A steel block has a volume of 0.08m3 and a density of 7,840kg/m3 what is the force of gravity acting on the block(the weight in water?

    asked by Anonymous on January 30, 2014
  34. 7th Grade Science

    what physical force can cause a change in the state of matter what is the difference between chemical and physical changes what occurs during Bose-Einstein condensation Please help me.

    asked by completeidiot on September 4, 2012
  35. Physics

    A 2500-kg car is traveling at 20 m/s around a road curve of radius 200 m. Find the central force acting on the car?

    asked by Jen on September 13, 2015
  36. Physics

    A 1.2kg box on a table slides through a displacement of d is equals to 2m a frictional force fx =0.5N Wat is the initial speed of the box

    asked by Anonymous on March 7, 2013
  37. math science geography

    A resultant force of 15.00n acts on a body for 4s mass 4kg. calculate the change in momentum of the body within this period

    asked by john on May 20, 2017
  38. physics

    A boulder in a river has weight of 65N. It displaces a volume of water with a weight of 10N. Which is the net force on this rock? 55 N down 65 N down 75 N up 75 N down

    asked by Carter on April 17, 2012
  39. physics

    A boat is inclined upwards at 30 to the horizontal. the tension of the string is 200N. what is the force tending to raise the boat out of water.

    asked by anointed on February 21, 2016
  40. Science -

    "To lift an object weighing 12,000N, how much force is needed on a piston with an area of 0.060 m^2 if the platform being lifted has an area of 3.0 m^2?"

    asked by Rene on October 7, 2018
  41. physics

    Two identical positive charges exert a repulsive force of 6.6 multiplied by 10^-9 N when separated by a distance of 5.8 multiplied by 10^-10 m. Calculate the charge of each.

    asked by Mara on January 13, 2009
  42. physics

    Determine the force required through A for the system to remain in static equilibrium in the horizontal (not moving side to side). The forces at B and C are 40 N and 90 N, respectively

    asked by Anonymous on February 12, 2012
  43. Science

    Two fixed particles of changes 1 micro coulomb and 3micro coulomb are 10cm apart. How far apart from each other should a third charge be placed so that no net electrostatic force acts on it.

    asked by Felicia on October 8, 2016
  44. physics

    Does the tension in the rope or chain of a swing do any work on a child who is swinging? No. Work is done when the force is applied in the direction of motion.

    asked by mitch on September 30, 2006
  45. physics

    The mass of a vehicle is 4.25 tones concentrate 1.25 meters behind the front wheels what is the force required to jack up the rear wheels?

    asked by shelly on March 30, 2014
  46. Calculus

    A rusted bolt requires 30 J of torque to be loosened. If only 40 N of force is applied to a wrench with which it makes a 90° angle, how long is wrench?

    asked by Jake on April 2, 2012
  47. Garde 12 Calc

    Determine the work done by force f=[1,4] in newtons for an object moving along the vector d =[6,3] Okay i found the vector equation and then the parametric and now i have no clue what do please help :)

    asked by Louis on June 18, 2012
  48. intermolecular force

    In a mixture of ethanol and water, the strongest intermolecular force present between the two chemicals is ? is it hydrogen bond? yes its hydrogen bonding

    asked by krissee on January 26, 2007
  49. Marianne

    Fill in the blank: The electrons follow a ________ path when they are deflected in a magnetic field due to the magnetic force.

    asked by Physics on March 13, 2015
  50. Physics

    A 200N force acts on a 30kg mass on a horizontal surface against 50N of friction. What is the speed of the mass after 5 seconds?

    asked by Teah on October 18, 2010
  51. physics

    A body of mass 5kg is to be given an acceleration of 20m/s2.calculate the force required when acceleration is vertically upwards (g=10m/s2)

    asked by Abdullahi on January 20, 2016
  52. Physics

    Initially sliding with a speed of 2.3 m/s, a 2.0 kg block collides with a spring and compresses it 0.41 m before coming to rest. What is the force constant of the spring?

    asked by Abby on March 9, 2010
  53. physics

    What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.38 and 0.28, respectively.

    asked by garth on June 7, 2012
  54. Physics

    A boy on a bucycle drags a wagon full of newspapers at 0.80m/s for 30 minutes using a force of 40N. How much work has the boy done?

    asked by kelly on April 8, 2011
  55. English

    I left out 2 sentences. Can you help me check it? Thank you. 1) She is not the complement to her husband,but (?) rather the driving force behind her husband. In spite of the fact that we tried to save him, he died.

    asked by Henry2 on December 4, 2011
  56. Calculus

    When a particle is located a distance x meters from the origin, a force of cos(x/4) newtons acts on it. How much work W is done in moving the particle from x = 1 to x = 3?

    asked by Ethan on December 4, 2011
  57. Physics

    Using a ramp length of 2m, you apply a 150N force to move a 20kg object a vertical distance of 1m. How much work did you do on the object?

    asked by Faith on November 28, 2015
  58. Physics

    A rowboat passenger uses an oar to push the boat off the dock by exerting a force of 40.0 N for 3.0 s. What impulse acts on the boat? What formula do I use?

    asked by Chad on February 16, 2013
  59. Physics Coulombs Law

    A proton is at the origin and an electron is at the point x = 0.45nm , y = 0.38nm . Find the electric force on the proton. Fx , Fy = N How do I go about solving these 2 problems?

    asked by Anonymous on February 3, 2015
  60. physics

    Three point charge are located at a line 20cm with charge q1= -3uC, q2= +4uC, q3= -7uC. Determine the magnitude of the force.

    asked by ama on January 31, 2015
  61. Physics

    A 980 kg car traveling at 20 m/s rounds a curve of radius 40 m. What is the friction force that must act on the car to keep it in its circular path?

    asked by Mark on November 16, 2012
  62. Physics

    If a lever is 6 feet long and the fulcrum is six inches from a 500 N boulder, how many newtons of force would be needed to life the boulder?

    asked by Alex on March 17, 2012
  63. Physics

    forces of 185N and 245N act east and south respectively on an 80 kg mass.If the force of friction is ZERO , find the accleration of the mass.

    asked by Jo on December 9, 2010
  64. physics

    Two charges are separated until they are a distance of 191 cm apart, causing the electric force between them to increase by a factor of exactly 5. What was their initial separation distance?

    asked by anonymous on March 1, 2011
  65. physics

    a force of 890n acts on a body that weighs 265n if the body starts from rest, how fast will it be going after it has moved 3.00m

    asked by lml on February 13, 2014
  66. Physics

    1580 kg car is traveling with speed of 15 m/s. What is magnitude of horizontal net force that's required to bring the car to a stop in 50 m?

    asked by Jenn on October 5, 2009
  67. physics

    A conductor of length 2m carries a current of magnetic field of magnetic flux density 0.5T. The maximum force acting on it is ?

    asked by taylor on July 12, 2016
  68. Science

    A car of mass 1200kg increases its velocity from 20m/s to 60m/s in 8seconds. Calculate the acceleration force on the car.

    asked by Lucky chembe on April 17, 2016
  69. Physics

    A Spring of force constant 300N/m is compressed such that its length shortens by 3cm. calculate the energy stored in the spring?. please Help

    asked by Ochuko on January 22, 2011
  70. P

    Calculate the magnitude of the gravitational force exerted on a 1,405-kg satellite that is a distance of two earth radii from the center of the earth.

    asked by Anonymous on October 10, 2012
  71. English

    What could I use as a memory clue (or picture) for the following words? Evicted: Def. To force out. Requisitioned: Def. Demand, or urgently ask for something for military needs.

    asked by Tommy on August 23, 2008
  72. physics

    The two forces F1 and F2 act on a 27-kg object on a frictionless tabletop. If F1 = 7.1 N and F2 = 33 N, find the net force on the object and its acceleration. WHAT IN the world...how do i figure this out!

    asked by aNGEl on November 7, 2010
  73. AP Physics

    A car does 8.0 ✕ 104 J of work in traveling 2.7 km at constant speed. What was the average retarding force (from all sources) acting on the car?

    asked by - on November 11, 2015
  74. physics

    If a resultant force of 15N acts on a body of mass 4kg for 4seconds.Calculate the change in momentum of the body

    asked by Ibem on February 16, 2017
  75. Physics

    A constant unbalanced force is applied to an object for a period of time. What would the graph look like as acceleration as a function of elapsed time?

    asked by Zoë on June 7, 2016
  76. Physics A

    how much work is being done a bookshelf being pulled 5 meters at an angle of 37 degrees from the horizontal? The magnitude of the component of the force that does the work is 43 Newtons

    asked by Maddie on November 21, 2012
  77. physics

    A body of mass m is attracted to a 11 kg mass 31.2cm away with a force magnitude of 6.42 x 10^-8 Find m? I am having trouble with the algebra getting m by it self just show me the steps if you can

    asked by john on November 15, 2012
  78. physics

    a 10 kg weight is on an inclined plane. 10 ft long and 6 ft high. if there is no friction, what force parallel to the plane will prevent the body from slidin?

    asked by hurd on November 23, 2012
  79. Physics

    The four wires in the figure are tilted at 20 with respect to the field direction. Each carries 4.5 and is 0.35 long. What is the magnitude and direction of the force on each wire?

    asked by Bob on March 7, 2011
  80. physics: BOB or DRWLS follow up question

    What average force is required to stop an 1100-kg car in 8.0 s if it is traveling at 95 km/h? i understand what you both did, but why can't you use the V = Vo + at equation and solve for acceleration there and use that in the EF = ma equation?

    asked by beckii on November 21, 2007
  81. Science

    Humid breaks down chs molecules become ionized) in an electric field of 3.0×10^6N/C. In that field what is the magnitude of the elextrostatisc force on(a) an electron

    asked by ernaawati on April 26, 2018
  82. Physics

    A box is pushed across a floor with a force of 2.8 N at an angle of 26.8 degrees above the horizontal. How much work, in Joules, must be done to move the box a distance of 8.3 m?

    asked by Amolica on April 21, 2016
  83. physics

    A force of -9000 N is used to stop a 1500kg car traveling at 20 m/s. What braking distance is needed to bring the car to a halt?

    asked by Bobbie on November 1, 2011
  84. Physics

    A 100 N force is applied to a 50.0 kg crate resting on a level florr. The coeeficient of kinetic friction is 0.15. a. What is the acceleration of the crate?

    asked by jdajaljk on January 28, 2011
  85. walter

    A positive charge of 1.5x10^-8 C experiences a force of 0.025 N to the left in an electric field. What are the magnitude and direction of the field?

    asked by george on March 8, 2012
  86. physics

    Two rocks sitting in the field are 200m apart. If the two rocks have a mass of 75Kg and 100Kg respectively, what is the gravitional force between them? Answer now pls!!

    asked by Kayla on November 30, 2011
  87. physics

    A 63.8 kg woman lifts herself 36.6 cm each time she does a chin-up. What force does she exert in lifting herself to the chin position? And, how much positive work does she do in pulling herself up once?

    asked by confused on October 16, 2014
  88. Physics

    When a 75kg goes over the top of a hemispherical bump at a speed of 18m/s their contact force with the ground is just 250N. What is the radius of the bump?

    asked by John on April 1, 2019
  89. physics

    three forces, each of magnitude 1450 LB act in the same point. The angle between adjacent forces is 45.0 degree. Find the resultant force?

    asked by carol on November 24, 2013
  90. ps

    A climber pulls herself 8 meters upwards with a force of 150 Newtons. If it takes her 16 seconds to cover the 8 meters, how much power is she using?

    asked by Anonymous on October 4, 2010
  91. Physics

    A bike and cyclist have a combined mass of 75 kg. If the brakes can apply a maximum force of 20 N, what is the shortest time in which the cyclist can stop?

    asked by Justin on February 10, 2015
  92. physics

    Initially sliding with a speed of 4.1 m/s, a 1.8 kg block collides with a spring and compresses it 0.37 m before coming to rest. What is the force constant of the spring? k=Nm

    asked by ani on April 3, 2017
  93. physics

    An electric field of 210000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -6.2C at this spot?

    asked by shaun on February 14, 2013
  94. Physics

    a person jumps from a ledge 3.7 meters and when he drops to the ground it takes .7 meters for him to stop what is the force applied to his body

    asked by Cat on June 30, 2013
  95. physics

    two identical copper spheres are separated by 1m in vacuum. how many electrons would have to be removed from one sphere and added to other sphere so that they attract each other with force of 0.9N

    asked by divy on June 2, 2014
  96. physics

    An elastic spring of force constant 20Nm is stretched through 8m within its elastic limit calculate the energy stored on thestring?

    asked by BIZHATOCOTO on April 9, 2019
  97. Physics

    If the circle and square have the same area, then magnetizing force at the center of the coil as a result of current flowing through the coil will be in the ratio

    asked by Judish on October 9, 2012
  98. physics

    a car weighing 14700N is moving at 20m/s. If the frictional force on it is 2160N , How fast would it be moving when it has travelled 50m

    asked by maham on May 13, 2013

    dETERMINE the horizontal force needed to accelerate a 50 kg grocery cart from rest to 0.90 m/s in 2.8s if the coefficient of friction between the cart and the floor is 0.20?

    asked by Dulce on August 11, 2014
  100. Physics

    A hockey skater turns in a circular path with radius of 31.0 m while going 10.5 m/s. If he experiences a centripetal force of 565 N, what is the mass of the skater?

    asked by Smit on November 15, 2015