1. physic

    A roller coaster car (390 kg) moves from A (5.00 m above the ground) to B (19.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a
  2. Physics

    A roller coaster (340. kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long
  3. physics

    A roller coaster (375. kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long
  4. physics

    A roller coaster (425 kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long
  5. Physics

    A roller coaster (491 kg) moves from A (1.09 m above the ground) to B (26.3 m above the ground). Two non-conservative forces are present: friction does -2.39 x 104 J of work on the car, and a chain mechanism does +5.18 x 104 J of work to help the car up a
  6. Physics(Please respond)

    1) A roller coaster (398 kg) moves from A (3.82 m above the ground) to B (29.4 m above the ground). Two non-conservative forces are present: friction does -1.82 x 104 J of work on the car, and a chain mechanism does +5.49 x 10^4 J of work to help the car
  7. Physics(Please respond)

    1) A roller coaster (398 kg) moves from A (3.82 m above the ground) to B (29.4 m above the ground). Two non-conservative forces are present: friction does -1.82 x 104 J of work on the car, and a chain mechanism does +5.49 x 10^4 J of work to help the car
  8. Physics

    a 4,500 kg roller coaster starts from the top of a 45 m hill with a velocity of 3m/s. The car travels to the bottom through a loop and continues up the next hill. The end of the roller coaster has a level surface that is 4m off the ground. Assume that
  9. Physics

    A roller coaster works by gravitational energy. The coaster car is pulled up to a high point and then released, rolling downwards on the track through all manners of curves and loops. I have a short roller coaster car that I pull up to the top of a hill of
  10. physics

    The (nonconservative) force propelling a 1.50 103-kg car up a mountain road does 5.10 106 J of work on the car. The car starts from rest at sea level and has a speed of 31.5 m/s at an altitude of 1.90 102 m above sea level. Obtain the work done on the car
  11. Physics

    A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and
  12. Physics

    A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and
  13. physics

    A 500kg roller coaster starts from rest at points 35m above the ground level. The car drives down into a valley 4m above the ground and then climbs the top of a hill that is 24m above the ground level. What is the velocity of the car in the valley and at
  14. Physics

    A roller-coaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the
  15. Physics

    A roller coaster car of mass 1000kg is riding along a track from point A to point C. (point A is 75m high, B is 50m high and C is 100m high, so that there are a total of three hills.) the final velocity at point C is 10m/s a) Assume no friction what is the
  16. physics

    A roller-coaster car with a mass of 550 kg starts at rest from a point 46 m above the ground. At point B, it is 23 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? Incorrect: Your answer is
  17. Science

    A stationary roller coaster at the top of its path is 30m about the ground. The car and its passengers have a mass of 400kg. What is the velocity of the car when it reaches the ground lever? The formula for velocity is (Distance/time)
  18. Physics

    A roller coaster car of mass 1000kg is riding along a track from point A to point C. (point A is 75m high, B is 50m high and C is 100m high, so that there are a total of three hills.) the final velocity at point C is 10m/s a) Assume no friction what is the
  19. Physics

    Analyzing Roller Coaster Performance Using Conservation of Mechanical Energy At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to
  20. Physics

    Steel Phantom is a roller coaster in Pennsylvania that, like the Desperado in Nevada, has a vertical drop of 68.6m Suppose a roller-coaster car with a mass of 1000 kg travels from the top of that drop without friction. The car then decelerates along a
  21. physics

    You are enjoying a day at the amusement park, riding a roller coaster, when suddenly a section of track up ahead crashes to the ground. You estimate that the cart is travelling at 5 m/s horizontally on the track before you begin to fall through the air. If
  22. physics

    A 1500-kg wooden roller coaster car traveling at 15 m/s approaches the loading station where the under-track brake strips are pneumatically actuated to slow the car to a stop in 10m. What is the work done on the car by the brakes? What is the retarding
  23. Physics

    a frictionless roller coaster car of mass m = 719 kg tops the first hill with speed v0 = 15.2 m/s at height h = 48.9 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If the
  24. Physics

    At the beginning of a roller coaster ride the car is staionary at the top of a 30m high hill and then begins to fall. Neglect any resistive forces. Calculate the speed of the car when it reaches the top of the second hill on the roller coaster. The second
  25. Physics

    A 775 kg roller coaster car is at the top of a roller coaster car is at the top of a roller coaster as shown below. The height of the car at point A is the minimum height that is necessary for the car to stay on the loop. The radius of the loop is 30 m.
  26. Physics

    True or false Consider a simple frictionless roller-coaster. It begins at x = 0, at a height of y = H. Then it drops into a dip, reaching a minimum at x = 100, with zero height (y = 0). Finally, it goes back up at x = 200, but only reaches a height of y =
  27. physics

    A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?
  28. Physics

    A roller-coaster car with a mass of 500 kg starts at rest from point A, which is 46 m above the ground. At point B, it is 23 m above the ground.
  29. Science

    The Millennium Force is the highest roller coaster in North America. It reached a maximum height to 94.5 m. The total mass of the roller coaster car and its passengers is 1380 kg. The speed of the roller coaster is 41.1 m/s at its lowest point on the
  30. energy conservation

    A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?
  31. Physics 1

    Consider a roller coaster that moves along the track shown in the figure below. Assume all friction is negligible and ignore the kinetic energy of the roller coaster's wheels. Assume the roller coaster starts with a speed of 19 m/s at point A. Find the
  32. Repost-Physics 1

    Consider a roller coaster that moves along the track shown in the figure below. Assume all friction is negligible and ignore the kinetic energy of the roller coaster's wheels. Assume the roller coaster starts with a speed of 19 m/s at point A. Find the
  33. Physics

    Consider a roller coster car moving along a track from point A to point B to point C. a)if the roller coaster car starts from rest at point A (30m above the bottom of a dip (point b). What would be the speed of the car at the top of the next hill (point
  34. Math

    The rattler roller coaster is 66 ft tall. if you are at the top of the roller coaster and your friend Larry is on the ground 35 ft away from the base of the coaster what is the angle of depression from the top of the roller coaster to the spot where Larry
  35. Physics Help Fast Please :)

    Question 2.2. A book is given a sudden push to make it slide along a desktop. If the initial speed of the slide is doubled, by what factor is the distance that the book slides changed? (Points : 1) 0.5 0.25 2.0 4.0 Question 3.3. A 720 kg roller-coaster car
  36. Physics

    we are doing a really dumb websearch in my Physics class on roller coasters and I really need help with like 5 problems! For the websearch I need to cite it so if you could provide any answers I also need the website! thanks in advance!!! Q's 8. If you
  37. Science

    Amber visits a theme park that has a roller coaster that travels upside down. Which of the following is the best explanation for why the roller coaster car stays in contact with the track when it travels upside down? A)The track and car are held together
  38. Physics

    A 1260-kg car starts from rest at the bottom of a drive way and has a speed of 3.00 m/s at a point where the drive way has risen a vertical height of 0.600 m. Friction and the drive force produced by the engine are the only two nonconservative forces
  39. Physics

    A 1200-kg roller coaster car is initially at the top of a rise, at point circle a. It then moves 145 ft, at an angle of 40.0° below the horizontal, to a lower point circle b. (a) Choose the car at point circle b to be the zero configuration for
  40. physics

    I really need help with these questions. My teacher doesn't provide me with anything to go on only some formulas and maybe 3 examples. It would be greatly appreciated! 1. Find the speed of a rock which is thrown off the top of a 20 m tall building at 15
  41. Physics

    The (nonconservative) force propelling a 1.50E3 kg car up a mountain road does 4.70E6 j of work on the car. The car starts from rest at sea level and has a speed of 27.0 m/s at an altitude of 2.00E2 m above sea level. Obtain the work done on the car by the
  42. Physics

    Consider a simple frictionless roller-coaster. It begins at x = 0, at a height of y = H. Then it drops into a dip, reaching a minimum at x = 100, with zero height (y = 0). Finally, it goes back up at x = 200, but only reaches a height of y = H/2. Assume
  43. physics

    The mass of a roller-coaster car, including its passengers, is 481 kg. Its speed at the bottom of the track in the figure below is 20 m/s. The radius of this section of the track is r1 = 24 m. Find the force that a seat in the roller-coaster car exerts on
  44. physics

    A 1000 kg car is initially at rest. If the motor does 10,000J of work on the car, what is the car’s final speed? (Neglect friction, and assume that the car is on level ground.)
  45. physics

    A roller-coaster car speeds down a hill past point A where R1 = 8.0 m and then rolls up a hill past point B where R2 = 14.0 m. The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car of 2.19 multiplied by 104 N at this
  46. PHYSICS

    You are driving a car down a straight road at a constant 48 miles per hour. Consider the following forces: I) air drag pushing back on the car; II) gravity pulling down on the car; III) the ground pushing up on the car; IV) friction pushing the wheels (and
  47. Physics

    A car on a roller coaster has a mass of 9528 kg. The car is dragged up the main hill at an angle of 38 degrees ( above horizontal) for a distance of 182 m to the top of the first hill. What work was done to the car ?
  48. Physics

    CAN SOMEONE PLEASE HELP ME; I NEED TO KNOW IF MY ANSWERS TO THESE QUESTIONS ARE CORRECT! THANK YOU SO MUCH!! 1.) Whenever an interaction occurs in a system forces occur in equal and opposite pairs. Which of the following do not always occur in equal and
  49. PHysics

    A dragster maintains a speedometer reading of 100 km/h and passes through a curve with a constant radius. Consider the following forces: I) air drag pushing back on the car; II) gravity pulling down on the car; III) the ground pushing up on the car; IV)
  50. Physics

    This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency of a roller coaster
  51. Physics

    This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency of a roller coaster
  52. Physics

    This speed is the maximum possible speed attained by the roller coaster, or the “theoretical speed”. Roller coasters are carefully designed to minimize frictional forces so that they approach these theoretical speeds. The efficiency of a roller coaster
  53. physics

    A 300 kg boulder is dragged 8 m across level ground with a chain that makes an angle of 37° with the horizontal. If the applied force on the chain is 800 N and there is a coefficient of friction of 0.20, find (a) the work done by the applied force, (b)
  54. Physics

    Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek sports car, has a motor that delivers only 35 kW of power at this speed. The other car needs its motor to produce 65 kW to move the car this fast. The difference is
  55. Physics

    Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek sports car, has a motor that delivers only 35 kW of power at this speed. The other car needs its motor to produce 65 kW to move the car this fast. The difference is
  56. Physics

    A roller-coaster car has a mass of 500 k when fully loaded with passengers. If at point a the forces exerted by the truck on the car is 15000 What is the acceleration at point A?
  57. Physics

    A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.
  58. Physics

    A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.
  59. Physics

    A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.
  60. Physics

    A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.
  61. Physics

    A roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 m/s. Using conservation of energy, find the velocity of the roller coaster at a height of 5 m above the ground.
  62. COLLEGE PHYSICS

    A rollercoaster car of mass 600.0 kg is moving 2.4m/s at the top of a peak that is 25m off the ground. The car moves down slope and up the next hill. Assume that it loses 20,000J of energy by the next time it gets to the top of the next peak due to
  63. Physics

    A tow truck pulls a car from rest onto a level road. The tow truck exerts a horizontal force of 1500 N on the car. The frictional force on the car is 810 N. Calculate the work done by each of the following forces on the car as the car moves forward 12 m:
  64. physics hw

    A 300. kg roller coaster car is traveling at a constant speed of 15 m/s over a hill with a radius of curvature of 30. m. b. What is the normal force acting on the car at the top of the hill? c. Assume that the car is at the intersection of the radius and
  65. Physics

    A roller-coaster car speeds down a hill past point A where R1 = 9.8 m and then rolls up a hill past point B where R2 = 15.8 m (R1 and R2 represent the radiuses/ radii) The car has a speed of 18.6 m/s at point A. if the track exerts a normal force on the
  66. Physics

    A roller-coaster car speeds down a hill past point A where R1 = 10.4 m and then rolls up a hill past point B where R2 = 15.6 m, as shown below. R1 and 2 are radii (a) The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car
  67. Physics Help, Please!

    When a car goes around a curve (without skidding), on a level road, Select one: a. no friction force is needed because the car simply follows the road. b. the friction force of the road on the car increases when the car’s speed decreases. c. the friction
  68. Physics

    A roller-coaster car speeds down a hill past point A where R1 = 8.2 m and then rolls up a hill past point B where R2 = 15.4 m, as shown below. (a) The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car of 2.30 ✕
  69. physics

    In the figure, a frictionless roller coaster car of mass m = 938 kg tops the first hill with speed v0 = 14.9 m/s at height h = 31.5 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If
  70. physics

    In the figure, a frictionless roller coaster car of mass m = 672 kg tops the first hill with speed v0 = 19.4 m/s at height h = 34.7 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If
  71. Physics.

    A roller-coaster car speeds down a hill past point A where R1 = 8.6 m and then rolls up a hill past point B where R2 = 16.0 m. (a) The car has a speed of 18.4 m/s at point A. if the track exerts a normal force on the car of 2.21 104 N at this point, what
  72. Physics

    A 2000 kg car pushes a 3000 kg truck that has a dead battery. The ground pushes forward on the car with a force of 6000 N. What is the magnitude of the force that the truck exerts on the car? Ignore any friction forces. My work/attempts: I've drawn a for
  73. Science

    i am doing a roller coaster project, and the coaster i picked was the Medusa in Marine World Six Flags. Now, I need help with the reqirements. We have to have at least 10 forces, and I have 9. I'm not too sure of what some of the forces are on a coaster.
  74. Math 11

    A roller coaster has a track that drops at an angle of depression of 25 degrees from a height of 14.9 m. When it reaches the ground in travels horizontally for 8 m. It then rises at an angle of elevation of 47 degrees to a height of 26.8 m A) What is the
  75. Physics

    At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car rolls freely down this hill and reaches its maximum speed
  76. Physics

    At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car rolls freely down this hill and reaches its maximum speed
  77. Physics

    At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car rolls freely down this hill and reaches its maximum speed
  78. physics

    A roller coaster car of mass 400kg starts from rest at point A and passes the point B with a speed of 3m/s.if the distance from A to B along the tracks is 20m,how large is the average friction force retarding the motion of the car
  79. Physics

    The track near the top of your favorite roller coaster has a circular shape with a diameter of 36 m. When you are at the top, you feel as if you weigh only one-fifth of your weight on the ground. What is the speed of the roller coaster?
  80. Physics

    The track near the top of your favorite roller coaster has a circular shape with a diameter of 36 m. When you are at the top, you feel as if you weigh only one-fifth of your weight on the ground. What is the speed of the roller coaster?
  81. physics

    The (non-conservative) force propelling a 1.40 x 103-kg car up a mountain road does 7.60 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 22.0 m/s at an altitude of 2.50 x 102 m above sea level. Obtain the work done on
  82. physics

    The (non-conservative) force propelling a 1.90 x 103-kg car up a mountain road does 6.70 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 20.0 m/s at an altitude of 1.80 x 102 m above sea level. Obtain the work done on
  83. physics

    3.A roller coaster has a vertical loop with radius 27.1 m. With what minimum speed should the roller coaster car be moving at the top of the loop so that the passengers do not lose contact with the seats?
  84. physics

    A roller coaster has a vertical loop with radius 17.9 m. With what minimum speed should the roller coaster car be moving at the top of the loop so that the passengers do not lose contact with the seats? (how do i go about in solving this)
  85. Physics

    A 57.5-kg skateboarder starts out with a speed of 1.80 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The
  86. physics

    A mechanic pushes a 2.50 x 10^3 kg car from the rest to a speed of v, doing 5000J of work in the process. During this time, the car moves 25.0 m. Neglecting friction between car and road, find (a) v and (b) the horizontal force exerted on the car.
  87. physics

    A roller-coaster car of mass 1.80 103 kg is initially at the top of a rise at point circle a. It then moves 40.8 m at an angle of 50.0° below the horizontal to a lower point circle b. (a) Find both the potential energy of the system when the car is at
  88. Science (Help, please!)

    "Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance.
  89. Physics

    A roller coaster car is loaded with passengers and has a mass of 500 kg along with a speed of 18 meters/second at the dip. The radius of curvature of the track at the bottom point of the dip is 12 meters (gravity = 9.8 meters/second2). What force is
  90. physics

    A 10,000N car is on a roller coaster. at the top of the tallest hill (position 1) the reaches a hieght 36m above the lowest point on the roller coaster (position 2). after accelerating down the hill the roller coaster makes another (position 3) climb that
  91. physic

    A mechanic pushes a 2,500 kg car from rest to a speed v, with 5000J of work. During this process the car moves 25m. Neglecting friction, calculate: a) the final velocity of car b) The horizontal force exerted on the car
  92. Physics

    The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 20 m radius of curvature. What is the car's speed at the bottom of the dip?
  93. Physical sciences(Mechanics)

    A tractor pulls a tree trunk across a horizontal piece of ground.If the force in the chain is 3000N and the chain forms an agle of 30 degrees with the ground,calculate:The forces with which the tree is pulled across the ground.
  94. physics

    A 54.5 kg. skateboarder starts out with a speed of 1.90 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The
  95. Physics

    The passengers in a roller coaster car feel 1.60 times heavier than their true weight as the car goes through a dip with a 24.0 m radius of curvature. What is the car's speed at the bottom of the dip? Which equation do I use? V= 2(pi)r/t = 2(pi)rtf = wr
  96. physic

    A roller-coaster car has a mass of 500 kg when fully loaded with passengers. The car passes over a hill of radius 15 m, as shown. At the top of the hill, the car has a speed of 8 m/s. What is the force of the track on the car at the top of the hill?
  97. Physics

    In class, we built a model of a roller coaster that would be one-hundredth of the size of the roller coaster if it were to be built in real life. On the model we built, 3.38G's were recorded. Would the amount of G-forces on the model roller coaster remain
  98. science

    2) A roller coaster is at the top of a 98.2 m hill and has a mass of 1831.0 kg. It is traveling at a velocity of 23.7 m/s. What is the coaster car's TOTAL energy? I used the eg=m*g*h equation and got a value of 1762081.16 .. i then used the ek=1/2mv^2 and
  99. science

    When the roller coaster is at the top of the loop, why doesn’t the person fall off the roller coaster? What forces are acting on the person when the roller coaster is going round the loop? Is it gravitational force and normal force?
  100. Physics

    An 91.0 kg in-line skater does 3620 J of nonconservative work by pushing against the ground with his skates. In addition, friction does -615 J of nonconservative work on the skater. The skater's initial and final speeds are 2.70 m/s and 1.02 m/s,