1. Physics

    A rescue plane has to drop supplies to a group of castaways who are stranded on a deserted island. The plane is flying as 150 m/s at a level altitude of 1200 m. How far ahead of the landing zone should the plane release the supplies? I'm not even sure how

    asked by Lindsay on November 2, 2007
  2. Algrebra

    Find K if the lines 3x-5y=9 and 2x+key=11 are a) parallel and b) perpendicular So for A) I have to find the slope, so would I set the x's equal to each other? And from there, I can find B) because the slope is just the reciprocal. I'm just having trouble

    asked by Yaga on September 3, 2016
  3. physical science

    A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4.25 m/s. But 3.2 s later, at the bottom of the slope it's speed is 22.75 m/s what is its average acceleration

    asked by Gracie on November 7, 2014
  4. physics

    A 18 kg block is dragged over a rough, hor- izontal surface by a constant force of 131 N acting at an angle of 27 ◦ above the horizon- tal. The block is displaced 15 . 7 m, and the coefficient of kinetic friction is 0 . 125. The acceleration of gravity

    asked by allan on January 19, 2015
  5. Physics, Energy

    The block is released from rest on the frictionless ramp. It compresses the spring by 20cm before momentarily coming to rest. What is the initial distance d? k=200N/m m=3kg angle=300 degrees The picture looks somewhat like this : (box is here) / / (spring

    asked by bobby on March 27, 2012
  6. physics

    A blob of mass 5 kg is place on a table top.it is attached to a mass piece of 2kg by a light string that passes over a frictionless pulley.the table top exerts a frictional force of 7 N on the block (a) calculate the accelation of the system

    asked by lesedi on June 2, 2015
  7. physics

    A boy is sledding down a slope that is inclined at 30.0° with respect to the horizontal. A moderate wind is aiding the motion by providing a steady force of 108 N that is parallel to the motion of the sled. The combined mass of the boy and sled is 53.6

    asked by simon on September 24, 2012
  8. calculus

    Determine the equation of a curve in the xy-plane that passes through the point (0, 1) and has the slope x2 sin 4x at any point (x, y) on the curve.

    asked by Sophie on September 29, 2010
  9. physics

    A block of unknown mass is attached to a spring with a spring constant of 6.00 N/m and undergoes simple harmonic motion with an amplitude of 12.0 cm. When the block is halfway between its equilibrium position and the end point, its speed is measured to be

    asked by Jessi on April 27, 2009
  10. physics

    so i created a graph Fe(N) vs. 1/r^2,so electric force vs the inverse squared of the radius.My slope was 9.21E-28, which was right. But what does the slope represent and how would I answer this question? a. Based on the slope of the line you created,

    asked by jon snow on November 30, 2016
  11. physics

    A 16g bullet moving horizontally at 400 m/s penetrates a 3.2kg wood block resting on a horizontal surface.(Figure 1) Part A If the bullet slows down to 300 m/s after emerging from the block, what is the speed of the block immediately after the bullet

    asked by bety on March 4, 2014
  12. Physic

    A bullet strikes a ballistic pendulum whose target block has a mass of 4kg. The block is observed to rise a distance of 3cm, and the bullet is weighed and found to have a mass of 20g. What is the speed of the bullet when it strikes the block? (Answer:

    asked by Anonymous on April 23, 2014
  13. mit

    A square shaped block of mass travels to the right with velocity on a frctionless table surface. The block has side-length . The block hits a very small, immovable obstacle on the edge of the table and starts to tip. The block has moment of inertia about

    asked by juanpro on March 23, 2016
  14. Physics

    A crate full of artichokes rests on a ramp that is inclined 10.0° above the horizontal. Give the direction of the normal force and the friction force acting on the crate in each of these situations. (a) The crate is at rest. Normal Force : 1.perpendicular

    asked by Max on February 22, 2010
  15. Physics

    A crate full of artichokes rests on a ramp that is inclined 10.0° above the horizontal. Give the direction of the normal force and the friction force acting on the crate in each of these situations. (a) The crate is at rest. Normal Force : 1.perpendicular

    asked by max on February 21, 2010
  16. physics

    Josh starts his sled at the top of a 2.0 m-high hill that has a constant slope of 25 degrees . After reaching the bottom, he slides across a horizontal patch of snow. The hill is frictionless, but the coefficient of kinetic friction between his sled and

    asked by kevin on March 8, 2012
  17. Physics

    A 0.0200 kg bullet moving horizontally at 500 m/s embeds itself into an initially stationary 0.500 kg block. (a) What is their velocity just after the collision? (b) The bullet-embedded block slides 8.0 m on a horizontal surface with a 0.30 kinetic

    asked by Amy on July 15, 2013
  18. Physics

    A person pushes with a horizontal force of 25 N 4kg block, initially at rest on a horizontal table, a distance of 3m. The coefficient of kinetic friction between the block and table is 0.35. determine external work on the block-table system. the energy

    asked by Star on April 16, 2014
  19. math

    Two planes left at the same time from two airports which are 4,500 miles apart and flew toward each other. In 5 hours, they passed each other. The rate of the fast plane was twice the rate of the slow plane. Find the rate of each plane.

    asked by MP on January 17, 2013
  20. physics

    A block is pushed 2 m along a fixed horizontal surface by a horizontal force of 10 N. The opposing force of friction is 0.4 N (a)How much work is done by the 10 N force? (b)what is the work done by the friction force

    asked by kwaku on November 13, 2010
  21. math

    i have more than one question so if u no any of the answers please tell me 1.) write the point-slope form of the equation of the line with slope -2 passing through the point ( -5, -9). 2.) write the point-slope form of an equation of the line through the

    asked by becca on May 17, 2010
  22. Microsoft Word 2013

    You often insert your company's logo into documents you create. One way to make it easier for you to quickly insert it is to save the logo as a A. custom block. B. text block. C. building block. D. shortcut. My answer is C.

    asked by Daniela on July 14, 2016
  23. Physics

    A 1.00 kg block is attached to a spring with spring constant 14 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 31 cm/s. What is the amplitude of the subsequent oscillations?What is

    asked by Taylor on January 26, 2012
  24. Special Education

    Given at least 3 blocks of contrasting colors from the table and guiding 1 hand to hold the block and the other to pick up the block, Shimon will be able to pick up the biggest block with one hand, 4/5 trials. There is something wrong with the above

    asked by Mike on May 4, 2011
  25. physics

    A 5 kg block is being held against the wall. What is the minimum force needed to keep the block from moving if the force is applied at an angle that is 15 degrees above the horizontal. The coefficient of static friction between the wall and the block is

    asked by Jamie on February 29, 2016
  26. Physics

    A student, crazed by final exams, uses a force P of magnitude 80 N to push a 4.0 kg block across the ceiling of his room. If the coefficient of kinetic friction between the block and the ceiling's surface is 0.42, what is the magnitude of the block's

    asked by Lily on November 2, 2010
  27. Math

    A plane is flying at an altitude of 12,000 feet and is preparing to land at a nearby airport. The angle from the airport to the plane is 17. To the nearest tenth of a foot, how far is the airport from the plane?

    asked by Valentino on March 4, 2012
  28. Physics

    A block of weight 4.8 N is at rest on a horizontal table. An upward vertical force of 0.6 N is applied to the block by means of a string. What is the magnitude of the force exerted by the block on the table top?

    asked by Yarielis on March 5, 2014
  29. Math

    a rectangular block 16 cm long has two spare faces. A cube of volume 343 cubic centimetre is cut from the rectangular block. Find the volume of the remaining block. Help me pls^

    asked by 大S on June 4, 2012
  30. Physics HELP!

    A block of mass 3 kg slides along a horizontal surface while a 20-N force is applied to it at an angle of 25°. If needed, use g = 10 m/s2. For a coefficient of kinetic friction of 0.3 between the block and the surface, the frictional force acting on the

    asked by Ashley on May 25, 2012
  31. Physics

    In the figure below, two blocks are connected over a pulley. The mass of block A is 12 kg, and the coefficient of kinetic friction between A and the incline is 0.22. Angle θ is 30°. Block A slides down the incline at constant speed. What is the mass of

    asked by Ben on February 21, 2011
  32. Physics

    A force of 50 N directed 30 degrees above the hoizontal is applied to a 10-kg block at rest on a rough horizontal surface. What is the coefficient of kinetic friction between the block and the horizontal surface if the acceleration of the block is 2.0

    asked by Heather on November 23, 2010
  33. Physics

    a 10.0 kg box is placed on a ramp that is inclined at 30.0 degrees to the horizontal. Determine the force friction required to keep the block stationary. Determine the minimum coefficient of friction required to keep the box stationary.

    asked by Shawn on May 11, 2017
  34. Physics

    A 10.0 kg box is placed on a ramp that is inclined at 30.0 degrees to the horizontal. Determine the force of friction required to keep the block stationary. Determine the minimum coefficient of friction required to keep the box stationary.

    asked by Sarah on May 12, 2017
  35. physics

    A slide-loving pig slides down a certain 35 degree slide in twice the time it would take to slide down a frictionless 35 degree slide. What is the coefficient of kinetice friction between the pig and the slide? I know that when the coefficent of kinetic

    asked by Bri on November 27, 2006
  36. Physics

    A block of mass M=6 kg and initial velocity v=0.8m/s slides on a frictionless horizontal surface and collides with a relaxed spring of unknown spring constant. The other end of the spring is attached to a wall. If the maximum compression of the spring is

    asked by Helena Beau on July 21, 2013
  37. physics

    A spring with a force constant of 100 N/m is used to push a 0.27 kg block of wood against a wall. (a) Find the minimum compression of the spring needed to keep the block from falling, given that the coefficient of static friction between the block and the

    asked by I have no clue on October 15, 2011
  38. Physics

    If a force F=200N is applied to the 34 kg cart, determine the time for the 20-kg block A to move on the cart 1.5 m. The coefficients of static and kinetic friction between the block and the cart are staticfriction=0.3 and kineticfriction=0.25. Both the

    asked by Jan on March 13, 2012
  39. Physics

    A 10 kg block of ice has a temperature of -13°C. The pressure is one atmosphere. The block absorbs 4.10 106 J of heat. What is the final temperature of the liquid water? I multiplied 10kg by -13 and divided by the heat absored by the block 4.10*10^6 but i

    asked by Chris on April 5, 2008
  40. Physics

    Suppose a hanging 1.0 kg lab mass is attached to a 4.0 kg block on the table. a. If the coefficient of kinetic friction, uk is 0.20, what is the acceleration of the block? b. What would be the minimum value of the coefficient of static friction, Us, in

    asked by jdajaljk on January 28, 2011
  41. Physics

    A student, crazed by final exams, uses a force of magnitude 86 N and angle θ = 61° to push a 5.2 kg block across the ceiling of his room, as in Figure 6-52. If the coefficient of kinetic friction between the block and the ceiling is 0.34, what is the

    asked by Tom on October 24, 2011
  42. physics

    A 3.26 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 29.0° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.10. What is the speed of the block

    asked by helena on December 5, 2010
  43. Physics

    A student, crazed by final exams, uses a force of magnitude 86 N and angle θ = 61° to push a 5.2 kg block across the ceiling of his room, as in Figure 6-52. If the coefficient of kinetic friction between the block and the ceiling is 0.34, what is the

    asked by Ted on October 24, 2011
  44. physics

    A 3.26 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 29.0° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.10. What is the speed of the block

    asked by lucy on December 5, 2010
  45. physics

    a block slides along a path that is without friction until the block reaches the section of length L = 0.75 m, which begins at height h = 2.0 m on a ramp of angle θ = 30°. In that section, the coefficient of kinetic friction is 0.40. The block passes

    asked by Kayla on March 30, 2016
  46. Physics

    A 4.500 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.455 and the coefficient of kinetic friction is μk = 0.155. At time t = 0, a force F = 12.4 N is applied horizontally to the block.

    asked by Mira on October 29, 2014
  47. physics

    A 6.110 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.455 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 16.8 N is applied horizontally to the block.

    asked by lacie on December 10, 2014
  48. physics

    A 4.170 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.505 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 12.7 N is applied horizontally to the block.

    asked by ashley on October 26, 2012
  49. science

    A 4.240 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.455 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 11.6 N is applied horizontally to the block.

    asked by suvee on September 30, 2018
  50. algebra

    Find the slope and y-intercept. x=7 I know that the slope is undefined. The y-intercept would be none, right? Since no y is listed. What you have is a vertical line through x = 7. "y" can be anything. The slope is infinity and the y axis is never

    asked by Peggy on February 23, 2007
  51. Physics

    A horizontal spring attached to a wall has a force constant of 780 N/m. A block of mass 1.70 kg is attached to the spring and oscillates freely on a horizontal, frictionless surface as in the figure below. The initial goal of this problem is to find the

    asked by caitlin on September 28, 2011
  52. physics

    A 150 N block is at rest on a table, a cable is connected from this block to another hanging off of the table. This block is 75 N. What is the magnitude of the minimum force of static friction on the 150 N block required to hold both blocks at rest? What

    asked by kacey on August 9, 2012
  53. algebra

    Find the slope of any line perpendicular to the line through points (0,5) and(-3,-4). I found the slope to be 3, but would the answer to the question be -1/3 ? what are your thoughts?? The slope of your given line is (y2-y1)/(x2-x1) = (-4 -5)/(-3-0) =

    asked by Lindz on July 26, 2007
  54. physics (speed of plane by radar)

    The radar stations A and B, separated by the distance a = 500 m, track the plane C by recording the angles α and β at 1-second intervals, If three successive readings are shown in the table,calculate the speed v of the plane and the climb angle y at t =

    asked by micheal on November 11, 2012
  55. Algebra

    Find the slope of any line perpendicular to the line through the points (0, 5) and (-3, -4). Show work Find the slope of the line through the two points: slope= (y2-y1)/(x2-x1) you do that. Now the slope of the line perpendicular to this is the negative

    asked by Linda on May 20, 2007
  56. Physics

    A cable attached to a block of mass 14 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 5.4 N, what is the coefficient of kinetic friction between the block and the floor?

    asked by Heather on September 11, 2011
  57. physicsss

    A cable attached to a block of mass 11 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 5.3 N, what is the coefficient of kinetic friction between the block and the floor?

    asked by kj on February 14, 2009
  58. physics

    A wood block falls from a shelf and hits the ground after 1.2 s. The mass of the block is .25kg. The block hits the floor and comes to rest in .1s. Determine the force applied by the floor

    asked by JOHN on January 5, 2011
  59. Physics

    A 15-kilogram block is sliding on a dry, level surface with a coefficient of dry sliding friction of 0.3. The initial speed of the block is 10/m/sec. How far does the block slide before it stops?

    asked by Ali on October 16, 2009
  60. physics

    A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is The block's speed at the point where = 0.350 A?

    asked by Anonymous on September 22, 2010
  61. Physics

    the weight of the block if wood is 96.5 N. the coefficient of static friction between the block of wood and vertical wall is 0.45. what minimum force is required to prevent the block from sliding down the wall

    asked by Serge on April 7, 2016
  62. Physics

    A cable attached to a block of mass 8 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 5.3 N, what is the coefficient of kinetic friction between the block and the floor?

    asked by Sierra on June 21, 2012
  63. physics

    A 1.20 block is attached to a spring with spring constant 14.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50.0 . What is The block's speed at the point where = 0.350 A?

    asked by Anonymous on September 22, 2010
  64. Math

    Beth is waiting for her friends plane to land. the plane will land at time T uniformly distributed in 70 minuetes. Determine the probability that the Plane will land in 30 minutes?

    asked by Ali on January 3, 2017
  65. algebra

    Could someone please check my work. what is the slope of the line that passes through the given points?(2,12( and (6,11) -1/4 (my choice) 1/4 4 -4 My work: 11-12/6-2=-1/4 what is the slope of the line that passes through the given points? undefined( my

    asked by brandon on September 7, 2012
  66. physics

    You push a 2.0 kg block against a horizontal spring, compressing the spring by 15 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 75 cm from where you released it. The spring constant is 200 N/m. What is the

    asked by Meghan on November 8, 2010
  67. Physics

    A bullet of mass 5 g with velocity 1000m/s hits a wooden block of 1.5kg at rest. If the bullet penetrates through the block with a velocity of 400m/s, calculate the maximum height in which the block is lifted from its initial position.

    asked by Thiynes on July 14, 2014
  68. physics

    The coefficient of static friction between a block and a horizontal floor is 0.37, while the coefficient of kinetic friction is 0.10. The mass of the block is 3.8 kg and it is initially at rest. Once the block is sliding, if you keep pushing on it with the

    asked by anonymous on November 21, 2010
  69. Physics

    A solid rectangular block measure 0.100*0.080m*0.060m and floats freely in a liquid of density 1354kg/m^2 if the depth of liquid 0.04m up the block largest side. Find the density of the block.

    asked by Igbekele on February 26, 2012
  70. PHYSICS !!

    A 45.0g bullet is fired on a 2.0kg wooden block which is resting on a horizontal surface with a coefficient friction of 0.4 . If the speed of the bullet is 165m/s when it hits the block. Determine the maximum horizontal distance of the block will reach

    asked by gie on February 26, 2014
  71. physics

    need help with this question please a 1kg block starts at rest and slides down the incline. the coefficient of friction between the incline and the block is 0.1. The height of the incline is 2m, and the angle is 30 degrees. use energy consideration to find

    asked by sammeh on November 16, 2009
  72. physics

    You push a 4.6 kg block against a horizontal spring, compressing the spring by 27 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 63 cm from where you released it. The spring constant is 250 N/m. What is the

    asked by Keelia on November 2, 2011
  73. physics

    A 1.4-kg copper block is given an initial speed of 2.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in

    asked by Anonymous on April 12, 2012
  74. physics

    You push a 1.9 kg block against a horizontal spring, compressing the spring by 13 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the

    asked by Jacob on February 15, 2011
  75. Physics

    You push a 2.5 kg block against a horizontal spring, compressing the spring by 16 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the

    asked by Chris on February 19, 2012
  76. Chemistry

    A chemical reaction taking place on the surface of a block of sodium will not occur faster if the a. size of the block doubles b. block is cut in half c. surface area is increased d. amount of sodium is decreased

    asked by Aria on February 21, 2012
  77. chemistry 30

    A chemical reaction taking place on the surface of a block of sodium will not occur faster if the a. size of the block doubles b. block is cut in half c. surface area is increased d. amount of sodium is decreased

    asked by Tucker on December 30, 2011
  78. physics

    You push a 1.3 kg block against a horizontal spring, compressing the spring by 22 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 79 cm from where you released it. The spring constant is 220 N/m. What is the

    asked by Samira on April 7, 2013
  79. PHYSICS

    A CRATE OF MESS 50KG IS LYING ON A 30DEGREE INCLINE, A STEEL BALL OF MASS 20KG IS ATTACHED TO THE CRATE WITH A ROPE.THE ROPE IS GOING OVER A FRICTIONLESS PULLEY.CALCULATE THE FRICTION COEFICIENT NEEDED SO THAT THE 50KG BLOCK STAYS AT REST.

    asked by MORENA on September 16, 2011
  80. Physics

    A novice pilot sets a plane's controls, thinking the plane will fly at 2.50 * 10*2 km/h to the north. If the wind blows at 75 km/h toward the southeast, what is the plane's resultant velocity? Use graphical techniques please show me how to solve this. the

    asked by y912f on January 31, 2009
  81. Physics

    The captain of a plane wishes to proceed due west. The cruising speed of the plane is 245 m/s relative to the air. A weather report indicates that a 38.0 m/s wind is blowing from south to north. In what direction should the pilot head the plane relative to

    asked by Jrom on March 24, 2015
  82. Physics

    A rectangular block of wood is 40cm wide, 60cm long and 30cm deep. If its relative density is 0.7kg/m^3 and it floats with its 30cm side vertical, determine: a)the length of the block above the water surface and b)the minimum force required to completely

    asked by Momito on April 7, 2012
  83. Physics

    Consider the diagram of the box and bucket. If the coefficient of static friction is 0.5 and the coefficient of kinetic friction is 0.3, find the maximum mass of the bucket in order for the system to be in static equilibrium. If the block was given a

    asked by Caitlin on January 1, 2011
  84. Chemistry

    Hi, please can someone tell me if this is the right number of significant figures. 8.1 x 10 to the power of -3 would have 2 sig fig 910 would have 3 175.0 would have 3 please can some tell me if I've got this right Also how would I report each of the

    asked by Ally on March 8, 2011
  85. physics

    A block with a mass of 1.0kg is lifted up slowly from ground (0m) to height of 0.51m. block is slowly displaced horizontally by .10m. find total work done to displace block vertically and horizontally. Then find total work to lift block and move it

    asked by Ray on February 16, 2014
  86. Physics - Quidditch

    A light rope passing over a frictionless pulley connects two objects. One object has a mass of 10kg. The tension in the rope is 90N. Calculate the acceleration and the mass of the second object. Object 1 Fg-Ft = ma 100 - 90 - 10*a 10/10 = a a = 1m/s^2

    asked by Alex on April 2, 2008
  87. Physics

    A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (3.0 m, 4.4 m) while a constant force acts on it. The force has magnitude 2.3 N and is directed at a counterclockwise angle of 100°

    asked by Mario on October 1, 2009
  88. ph

    A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (3.0 m, 5.8 m) while a constant force acts on it. The force has magnitude 2.8 N and is directed at a counterclockwise angle of 100°

    asked by rob on November 29, 2014
  89. physics

    You spot a plane that is 1.63 km north, 2.3 km east, and at an altitude 5.2 km above your position. 1) How far from you is the plane? 2) At what angle from due north (in the horizontal plane) are you looking? 3) Determine the plane's position vector (from

    asked by amanda on February 13, 2018
  90. physics

    A 23.60 g bullet strikes a 6.31 kg stationary wooden block and embeds itself in the block. The block and bullet move together at 7.47 m/s. What was the original velocity of the bullet?

    asked by Anonymous on February 7, 2018
  91. Math

    Wooden blocks are stacked to form a cube 3 block wide, 3 block long, and 3 block high. How many blocks are used? 27 blocks are used

    asked by Jamar on December 14, 2014
  92. English

    1. He stooped down to pick up a block. 2. He bent down to pick up a block. 3. He rounded his body to pick up a block. (Can we use all the verbs? Do they have the same meaning? Which one is commonly used?)

    asked by rfvv on April 7, 2016
  93. science

    A ramp 20m long slopes down 1.2m to the edge of a lake. A force of 300N is needed to pull a boat on a trailer at constant speed up the ramp when they are clear of the water. If friction is negligible, what is the combined mass of the boat and trailer.

    asked by Jeff on February 16, 2014
  94. Physics

    Three blocks rest on a frictionless, horizontal table (see figure below), with m1 = 8 kg and m3 = 20 kg. A horizontal force F = 101 N is applied to block 1, and the acceleration of all three blocks is found to be 3.5 m/s2. Find m2. What is the normal force

    asked by Lauren on January 25, 2011
  95. Physics

    A force vector F of magnitude 12N is applied to a FedEx box of mass m2=1kg. The force is directed up a plane tilted by theta=37 degrees. The box is connected by a cord to a UPS box of mass m1=3kg on the floor. The floor, plane, and pulley are frictionless,

    asked by Rick on July 7, 2010
  96. physics

    A block of mass M hangs from a rubber cord. The block is supported so that the cord is not stretched. The unstretched length of the cord is L0 and its mass is m, much less than M. The "spring constant" for the cord is k. The block is released and stops at

    asked by Stephen on December 1, 2009
  97. physics please help! 116

    Two blocks are connected by a rope that passes over a set of pulleys. One block has a weight of 412 N, and the other has a weight of 908 N. The rope and the pulleys are massless and there is no friction. (a) What is the acceleration of the lighter block?

    asked by Hannah on February 11, 2011
  98. physics

    A block of wood with a mass of 4.62 kg sits on the edge of a table that is 0.99 m tall. A bullet with a mass of 70.5 g traveling with a speed of 450 m/s is shot into the block and is lodged in it. Assuming that no energy is lost to friction, how far from

    asked by dean on February 10, 2014
  99. Physics

    A block having mass 90 kg.just contact the top of the free end of spring. (1) find the maximum deflection of spring if the block is released instantaneously with zero initial velocity. (2) if the block is very gradually lowered on the spring. The stiffness

    asked by Sarsi on October 23, 2013
  100. physics

    A 5.56 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.7 N at an angle theta = 17.0° above the horizontal, as shown in the Figure. The coefficient of kinetic friction between the block and the floor is 0.06. What is

    asked by jim on January 4, 2013