What is the net force on a rock that weighs 500N if the weight of the water it displaces is 300N?

36,046 results
  1. Science

    1. Two 20.-newton forces act concurrently on an object. What angle between these forces will produce a resultant force with the greatest magnitude? (1) 0° (2) 45° (3) 90.° (4) 180.° 2. A rock is thrown straight up into the air. At the highest point of

  2. Physics

    A woman who weighs 500N stands on an 8.0-m-long board that weighs 100N. The board is supported at each end. The support force at the right end is 3 times the support force at the left end. How far from the right end is the woman standing?

  3. Physics

    A stone is thrown straight up. At the top of the path, the net force acting on it is (ignore air resistance) a) greater than its weight b) greater than zero, but less than its weight c) instantaneously equal to zero d) equal to its weight At the very top

  4. physics

    A toy car is given a quick push so that it moves on an inclined ramp. After it is released, it moves up, reaches its highest point and moves back down again. Friction is so small it can be ignored. What net force acts on the car? A. net force of zero B.

  5. Physics

    a small rock with mass 0.20 kg is released from rest at point A which is at the top edge of a large, hemispherical bowl with radius R = .5m. assume that the size of the rock is small compared to R, so that the rock can be treated as a particle, and assume

  6. Physics

    A 70kg man jumps 1.00 meters down onto a concrete walkway. His downward motion stops in 0.02 seconds. If he forgets to bend his knees, what force is transmitted to his leg bones? a. 15 500N b. 7 010N c. 4 900N d. 3 500N How do you solve this

  7. physics

    a skydiver who weighs 500N reaches terminal velocity of 90 km/h. the air resistence on the diver is then... a)90N b)250N c)410N d)500N e)none of these EXPLAIN PLEASE :)

  8. physics- please help !

    A box weighing 65.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Part a) Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley

  9. statistics and probability

    A brand of powdered milk is advertised as having a net weight of 150 grams. A curious consumer obtained the net weight of 10 randomly selected cans. The values obtained are 256, 248, 242, 245, 246, 248, 250, 255, 243, and 149 grams. Is there a reason to

  10. Physics

    I was wondering if my answers are correct. 1. A 50kg person is taking a ride on an elevator travelling up at a steady speed of 2.5m/s. Find the time fo the elevator trip if the elevator does 4900 J of work on the person. My answer: First I used the formula

  11. Physics

    A rock weighs 140 N in air and has a volume of 0.00273 m3. What is its apparent weight when sub- merged in water? The acceleration of gravity is 9.8 m/s2 . Answer in units of N. If it is submerged in a liquid with a density exactly 1.9 times that of water,

  12. Physics

    How much work(energy) is needed to lift an object that weighs 200N to a height of 4m? My question: is weight the same as force? if not, how do I find the amount of force

  13. physics

    lots of questions 1) a 2N and 6N force pull on an object to the right and a 4N force pulls to the left a 0.5 kg object what is the net force on the object 2)a 20mkg bike accelerates at 10m/s2 with what force was the person pedaling 3)if a person is pushing

  14. Physics

    a rock is thrown straight up which of the following statemetns concerning the net force acting on the rock at the top of the path is true? assume air resistance is negligible. a)it's equal to the weight of the rock b) it is instantanwously equal to zero c)

  15. Physics

    A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point? My answer: ---------- FIRST LINK (top): Upward force from

  16. Physics

    A 10.0-kg object experiences a drag force due to air resistance. The magnitude of this drag force depends on its speed, and obeys the equation Fdrag =(12.0 N-s/m)v + (4.00 N-s2/m2)v2. (a) What is the terminal speed of this object if it is falling due to

  17. science

    On a planet far, far away, an astronaut picks up a rock. The rock has a mass of 4.20 kg, and on this particular planet its weight is 40.0 N. If the astronaut exerts an upward force of 45.5 N on the rock, what is its acceleration? Magnitude

  18. Science

    A 20 kg mass slides down an inclined plane which is at an angle of 60 degrees to the horizontal 1. Horizontal component of weight force 2. Vertical component of weight force 3. Angle 4. Normal force 5. Net fx 6. Acceleration along incline I really do not

  19. math

    4 PART Your weight on different planets is affected by gravity. An object that weighs 150 pounds on Earth weighs only 56.55 pounds on Mars. The same object weighs only 24.9 pounds on the Moon. A)What percent of an object's Earth weight is its weight on

  20. math

    Two horizontal forces act on a wagon, 550N forward and 300N backwards. What force is need to produce a net force of zero? 500 N 300N -----> Object

  21. Physics

    A box is pushed by a 750 N force that acts at a 30 degree angle with a friction less surface.The force pushes a box that has a weight of 500N a distance of 15 meters. How much work is done on the box?

  22. chem, help please

    A 0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. The velocity of the rock is 4.50 m/s. What is the centripetal force acting on the rock? how do i find centripetal force??

  23. luma

    A rock weighs 100 N in air and has a volume of 0.00312 m^3. What is its apparent weight when submerged in water? The acceleration of gravity is 9.8 m/s^2. Answer in units of N.

  24. Science

    A weightlifter lifts a weight of 500N from the ground over her head, a distance of 1.8m. How much work has been done to move the weight?

  25. physics

    a rock weighing 20.0N falls from a height of 16.0m and sinks 0.600 m into the ground. from energy considerations, find the average force between the rock and the ground as the rock sinks. (avg. force) x (distance sunk) is the3 work done by the soil in

  26. Math

    Mass is a measure of how much “stuff” is in an object. The SI unit for mass is the kilogram (kg). Weight depends on the force of gravity. The SI unit for force is the newton (N). On Earth, a 1-kg object weighs about 9.81 N. (Also, 1 pound is equivalent

  27. PHYSICS

    1. What is the weight of a 2.88 kg snake? 2. A girl drops a rock straight down from a bridge. Assume negligible air resistance. How fast is it going 4.0 s later? 3. A rock with a mass of 22.45 kg is falling from a tall tower. a. What is the Net Force if

  28. Physics

    a rock suspended from a string moves downwards at constant a=g. Which of the following is true concerning the tension in the string? a) the tension is zero b)the tension is equal to the weight of the rock c)the tension is less to the weight of the rock

  29. physics

    Two window washers, Bob and Joe, are on a 3 m long, 345 N scaffold supported by two cables attached to its ends. Bob, who weighs 750 N stands 1 m from the left end, as shown in Figure 8.37. Two meters from the left end is the 500 N washing equipment. Joe

  30. sicence

    A weightlifter lifts a weight of 500N from the ground over her head, a distance of 1.8m. How much work has been done to move the weight?

  31. Algebra 2

    I got no response so I guess I'll try again The force needed to overcome friction and drag a person across the floor depends on the person's weight. Manuel Dexterity can drag Gil O' Teen across the floor by pulling with a force of 51 pounds. Gil's brother,

  32. Physics

    James's tug of war team pulls with 500N of force to the right wile Jake's team pulls with 415N to the left. If James's team weighs 350 kg, how fast are they moving?

  33. Physics help!!

    A crate is pulled to the right with a force of 80 N, to the left with a force of 125.8 N, upward with a force of 615.4 N, and downward with a force of 248 N. Net external force in the x direction: -45.8 Net external force in the y direction: 367.4 N how do

  34. Physics

    A uniform of 100N pipe is use as a lever. When must the fulcrum (supported point) be placed if a 500N weight at one end to balance a 200N weight at the other end? How much load must support (S) hold?

  35. pyshics

    A small rock moves in water, and the force exerted on it by the water is given by the equation Fd = kv, where k is a constant. The terminal speed of the rock is measured and found to be 2.0m/s. The rock is projected upward at an initial speed of 6.0m/s.

  36. Algebra 2

    The force needed to overcome friction and drag a person across the floor depends on the person's weight. Manuel Dexterity can drag Gil O' Teen across the floor by pulling with a force of 51 pounds. Gil's brother, Nick who weighs twice as much can be

  37. Physics

    Two people carry a heavy electric motor by placing it on a light board 2 meter in length. One person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 500N. What is the weight of the motor, where along the board is

  38. statistics

    M&M plain candies have weights that are normally distrbuted with a mean weight of 0.8565 gram and a standard deviation of 0.0518 gram. A random sample of 100 M&M candies is obtained from a package containing 465 candies: the package label states that the

  39. AP Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

  40. science

    The net force on a rock with a mass of 2.0kg is 19.6N. What is the acceleration of the rock?

  41. physics

    a 100 kg boulder is placed under the surface of water. its volume is 0.5 x 10^5 cm^3. what is the weight of the rock while under water; compare that to the weight of the rock in air (sitting on the ground) i just found the weight of the rock in air by

  42. Physics

    A ladder of length 10m and weight 200N leans against a smooth wall such that its at an angle of 60 degrees to the horizontal. A boy of weight 500N stands on d ladder at 2.5m of the way from the lower end of the ladder. Calculate the normal reaction at the

  43. physics

    a 5.0kg concrete block accelerates down a 34 degree slope at 4.2 m/s^2. Find the coefficient of friction between the block and the slope. The component of weight down the slope is mg*SinTheta. The component of weight perpendicular to the slope is mg

  44. Physics

    A uniform plank of length 5.5 m and weight 219 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 447 N walk on the overhanging part of the plank before

  45. physical science

    Assume this asteroid has the shape of a sphere. A rock sitting on the surface of the asteroid has a weight of 100 newtons. What would the weight of this rock be if it were moved to a distance above the surface equal to the radius of the asteroid? It may be

  46. engineering science

    An object is kept in equilibrium on an incline by means of supporting force, which is at an angle of 30 degrees o the inclined. The weight of the obbject is 500N. The incline forms an angle of 45 degrees with the horizontal. The coefficent of the friction

  47. Physics

    The leg and cast in Figure P4.18 weigh 290 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w2 weighs 125 N. Determine the weight w1 and the angle α needed in order that there be no force exerted on the hip

  48. science physics

    A cyclist is moving to the right at a constant speed. when he applies brakes what will happen? a -net force will be to left b- net force will be to right c- acting net force will be zero d -inertia will stop him

  49. physics

    a 65kg person dives into the water from the 10m platform. she comes to a stop 2m below the surface of the water. what net force did the water exert on the swimmer? so for the net force i got -2548N i know: vf^2=vi^2 + 2ad vf^2 = 0 + 2(9.8)(10) vf^2 = 196

  50. physics

    What is the net force on a rock that weighs 500N if the weight of the water it displaces is 300N?

  51. Calculation !

    Bonjour If we have a young man who weigh's 1000 N and another one weighs 500N on a seesaw They have the same distance apart which is 2 metres away from the pivot Why do we get the overall 500N Turning clockwise to the 1000N person ? More mass in the

  52. math

    An object's weight on the Moon is less than its weight on Earth. This is because the Moon exerts less gravitational force on an object than Earth does. The equation m = can be used to find an object¿s weight on the moon, where m is the object¿s weight on

  53. science

    a small weather rocket weighs 20.5 N. The rocket is carried up into the air by a balloon. The rocket is released from the balloon and fired. What is the acceleration of the rocket if an upward force of 25 N is applied? Net force = force up - force down.

  54. 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

  55. Science

    If a force of 380 N is applied to the end of a 2 meter crowbar order to lift a 500N rock and if the fulcrum of the bar is 0.5 meters from the rock. What is the efficiency of the lever?

  56. science

    if the force which propels the cannonball forward is 500 n, how much force will move the cannon backward? I assume -500n because forward is the opposite of backward, and 500n is the opposite of -500n. Forces occur in equal and opposite pairs.

  57. Physics

    In the figure, a 52 kg rock climber is climbing a “chimney” between two rock slabs. The coefficient of static friction between her shoes and the rock is 1.20; between her back and the rock it is 0.707. She has reduced her push against the rock until

  58. Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

  59. Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

  60. physic

    A different scaffold that weighs 500N supports two painters, one 500 N and the other 500N . The reading in the left scale is 900N . what is the reading in the right hand scale

  61. physic

    A different scaffold that weighs 500N supports two painters, one 500 N and the other 500N . The reading in the left scale is 900N . what is the reading in the right hand scale

  62. SCIENCE

    Which of the following is equal to the buoyant force of a rock placed in a beaker of water? (1 point) volume of the displaced fluid weight of the displaced fluid volume of the rock weight of the rock

  63. physics

    Stemming a chimney. A rock climber of mass 71 kg wants to make her way up the crack between two rocks as shown in the figure below. The coefficient of friction between her shoes and the rock surface is ìS = 0.90. What is smallest normal force that she can

  64. Physics

    A constant net force of 406 N, up, is applied to a stone that weighs 33 N. The upward force is applied through a distance of 2.4 m, and the stone is then released. To what height, from the point of release, will the stone rise? Thoughts: F = ma. Would the

  65. physics

    A 200-kg rock is being pulled upward with an acceleration of 3 m/s2. The net force on the rock is

  66. physics

    A 40 kg rock is accelerating down a hill at 3 m/s2. What is the net force exerted on the rock

  67. Physics

    When I asked my teacher for help he told me this This is a logical puzzle. Having 75% of the typical weight means experiencing 75% of the typical gravity. The floor must be falling away with an acceleration of 25% of typical gravity. Here's the question I

  68. physics- please !

    A box weighing 65.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Part a) Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley

  69. physics

    wile e coyote pushes a 1500n rock toward the edge of a cliff with the road runner below. he gives a rock acceleration of .8m/s^2. what is the net force of the rcok?

  70. physics

    wile e coyote pushes a 1500n rock toward the edge of a cliff with the road runner below. he gives a rock acceleration of .8m/s. what is the net force of the rcok?

  71. Physics

    The coefficient of friction sliding on wood is 0.30. The force needed to slide a wooden block weighing 500N across a horizontal surface is: a. 50N b. 150N c. 300N d. 500N

  72. Physics

    Which is not expecting acceleration? A point on the outside of a spinning top whose rotational speed is constant. A skydiver whose air resistance is equal to that of her weight. A car on the freeway experiencing a net force of -120 N. A submerged beach

  73. Physics, Please Help

    A homeowner is trying to move a stubborn rock from his yard which has a mass of 1025 kg. By using a lever arm (a piece of wooden board) and a fulcrum (or pivot point) the homeowner will have a better chance of moving the rock. The homeowner places the

  74. physics

    Suppose that you shove an object so that it continues to slide (for a little while) across a level floor even after you have stopped pushing, but eventually it comes to a stop due to friction. (Assume there is no air resistance.) While it is sliding across

  75. Physics

    If an object weighs 70 pounds and it gets hit by a truck with a force of 7400 N, and there is a frictional force of -35 N, what is the net force?

  76. physics

    CRITICAL THINKING: The term ”weight” in physics has the following very specific meaning: “The weight of an object is the name given to a particular force: the gravitational force exerted by the earth on the object, giving it an acceleration of 9.8

  77. physics

    CRITICAL THINKING: The term ”weight” in physics has the following very specific meaning: “The weight of an object is the name given to a particular force: the gravitational force exerted by the earth on the object, giving it an acceleration of 9.8

  78. Physics

    1. It is incorrect. The friction has to equal the force down the plane...right? The trolley has no net acceleration, so it must have no net force. Net force= weight down plane - friction.

  79. Physics

    1. A gate is hinged at A and B. Rope CD is tightened so that the net force in the x is zero. Given that AD=1.5m, AB=2m, BC=2.5m, Force of gravity= 595N a. What is the tension in rope CD b. What is the horizontal force at rope B c. What is the combined

  80. physics

    An astronaut weighs 696 N on the Earth. What is her weight on planet X, which has a radius Rx = Rearth 1.60 and a mass Mx = Mearth 8.60? -the only equation I know for weight is "w = m x g"...I don't know how to solve for w using force.

  81. nature of science

    four forces are being applied to move an object to the left. Force 1 is pushing to the right at 200N. Force 2 is pushing to the left at 500N. Force 3 is pushing to the right at 100N. Force 4 is pushing to the left at 50N. What's the net force acting on

  82. Physics

    A fireman, whose weight is 500 N, slides down a pole with an constant velocity of 3 m/s. The forces that act on him are his weight pulling him down and the force of friction pulling up on him. What is the force of friction and the net force of the fire

  83. Science

    I don't understand Newton's second law: Net Force = Mass x Acceleration I don't understand what this says. Does it mean that the higher the mass, the more force it takes to move it the same distance as a lighter mass or something? HEEELP! The equation,

  84. Physics

    An object weighs 500N.what is its mass?

  85. Physicis

    Given: Two teams of children are well-matched, and they pull on the rope with exactly the same force. They have placed a 65n weight at the center of the rope. The teams first pull with 750n of force each, then in an heroic effort to straighten the rope,

  86. science

    A weightlifter lifts a weight of 500N from the ground over her head, a distance of 1.8m. How much work has been done to move the weight?

  87. Math

    8. The gross weight of a package and its contents is 11 pounds 5 ounces. If the packaging weighs 1 pound 15 ounces, what is the net weight of the contents? A. 12 lb. 20 oz. B. 10 lb. 5 oz. C. 9 lb. 6 oz. D. 10 lb. 6 oz. D or B?

  88. physics

    The force sensor measures the force on the sensor due to the bumper, but the cart's momentum change arises from the force on the cart due to the bumper. Which of the following facts are needed to assert that the magnitude of these two forces are nearly

  89. physics

    A box is placed on top of another box,if it is exerting a compressive force of 500N.What is the approximate weight of the box?

  90. HELP! - Physics

    I need help with this. A frustrated farmer is trying to move a large rock from his land. The stone has a mass of 1275 kg. By using a piece of board as a lever and a fulcrum the farmer will have a better chance of moving the rock. The farmer places the

  91. Physics

    John weighs 660 N, and Marcia weighs 486 N. Estimate the gravitational force between them when they are 0.47 m apart. I've tried finding the mass of john and marcia by doing m=F*a (F being their weight in Newtons and a being 9.8 m/s^2). When I found their

  92. Music

    What are rock ensembles? I went searching around the net to find out and all i came up with was the names of some really good rock bands. I'll try find out something useful but it might take a while =( An "ensemble" is a small group of musicians playing

  93. science

    A rock sample weight 60N on earth. what would be the weight of the same rock on moon?

  94. science physics

    An egg is free-falling from the nest. The egg weighs 10N and the force of air friction is 1N. What is the net force?

  95. Physics

    Example 1: (Rock A) is thrown against a larger stationary rock(Rock B). considering the following possibilities... 1. Rock A bounces off of Rock B 2. Rock A splits into two pieces off of Rock B 3. Rock A explodes into many pieces off of Rock B What factors

  96. math

    Andre is comparing the weight of his pets. His gerbil weighs 1/4 lb. His kitten weighs 7/8 lb. How many times the gerbil's weight is the kittens weight? Andre is comparing the weight of his pets. His gerbil weighs 1/4lb. His kitten weighs 7/8 lb. How many

  97. physics

    An elevator was design to transport 13 passenger between floor of a ten story building. The unloaded elevator car weighs 1050kg. Assuming tha the average passengers weighs 70kg,determine the weight of the counter weight.

  98. physics

    take a satalite going around the earth... what allows us to say net force (radial) = Fg = Fr = ma were the Fg is the force of gravity exerted on the satalite were Fr is radial force and ma is the mass and acceleration of the satalite ok I understand

  99. bio stats

    After a winter ice storm, 25 parrots are found sheltering in a tool shed. Ana traps the parrots, weighs them (average weight = 36 grams) and then feeds them. The next morning she find that 6 of the parrots have died. She weighs the dead ones (average

  100. Physics

    You are going to toss a rock straight up into the air by placing it on the palm of your hand(you are not gripping it) then pushing your hand up very rapidly. Draw a free body a diagram for the rock for each situation, and write the sum of equation based on

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