1. physics

    Using a spring gun, a 4.0-kg steel block is launched up a lubricated ramp made out of steel. The angle of the ramp was measured to be 38.8º. The inital speed of the block was 12.0 m/s. (a) Determine the vertical height that the block reaches above its
  2. Physics

    A 60 kg block slides along the top of a 100 kg block with an acceleration of 3.0 m/s2 when a horizontal force F of 320 N is applied. The 100 kg block sits on a horizontal frictionless surface, but there is friction between the two blocks. (a) Find the
  3. Physics

    I THINK SOMEONE HAS THIS SAME QUETION! A massless spring of constant k = 91.0 N/m is fixed on the left side of a level track. A block of mass m = 0.50 kg is pressed against the spring and compresses it a distance of d. The block (initially at rest) is then
  4. physics

    an ice skater applies a horizontal force to a 20 kg block on frictionless, level ice causing the block to accelerate uniformly at 1.4 m/s^2 to the right. after the skater stops pushing the block it slides onto a region of ice that is covered with a thin
  5. physics

    An 11.4 kg block of metal is suspended from a scale and immersed in water, as in the figure below. The dimensions of the block are 12.0 cm multiplied by 11.1 cm multiplied by 11.1 cm. The 12.0 cm dimension is vertical, and the top of the block is 5.00 cm
  6. physics

    A 1.7 kg block is moved at constant speed over a surface for which the coefficient of kinetic friction is 0.27. The displacement is 2 m. It is pushed by a force directed at 25 degrees below the horizontal. Find the work done on the block by: the force. How
  7. help! physics

    A 1.7 kg block is moved at constant speed over a surface for which the coefficient of kinetic friction is 0.27. The displacement is 2 m. It is pushed by a force directed at 25 degrees below the horizontal. Find the work done on the block by: the force. How
  8. Physics 1

    a skier of mass 70.0kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 60.0 m up a 35.0 degree slope (assumed to be frictionless) at a constant speed of 2.0m/s? The Value of g is 9.81 m/s^2?
  9. physics

    A 3.1 kg block has an initial velocity of 15 m/s as it moves 12m on a rough horizontal surface with coefficient of kinetic friction of .23.. ~ then slides up a frictionless incline whose angle is 24 degrees. A (8 pts) Sketch energy pie charts at points a,
  10. physics

    A 0.330-kg block of wood rests on a horizontal frictionless surface and is attached to a spring (also horizontal) with a 29.5-N/m force constant that is at its equilibrium length. A 0.0600-kg wad of Play-Doh is thrown horizontally at the block with a speed
  11. physics

    A block is dropped onto a spring with k = 27 N/m. The block has a speed of 3.2 m/s just before it strikes the spring. If the spring compresses an amount 0.13 m before bringing the block to rest, what is the mass of the block?
  12. science

    A 2:35 kg block is pushed 1:57 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of 67.5 degree with the horizontal. The acceleration of gravity is 9.8 m/s2. If the coefficient of kinetic friction between the
  13. phyics

    A block of mass m = 0.510 kg is fastened to an unstrained horizontal spring whose spring constant is k = 85.3 N/m. The block is given a displacement of +0.112 m, where the + sign indicates that the displacement is along the +x axis, and then released from
  14. PHYSICS

    A block of mass m = 0.889 kg is fastened to an unstrained horizontal spring whose spring constant is k = 89.4 N/m. The block is given a displacement of +0.128 m, where the + sign indicates that the displacement is along the +x axis, and then released from
  15. Physics

    A 2.5-kg block is sliding along a rough horizontal surface and collides with a horizontal spring whose spring constant is 320 N/m. Unstretched, the spring is 20.0 cm long. The block causes the spring to compress to a length of 12.5 cm as the block
  16. physics

    A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (muk = 0.43). What is its final speed? (m/s) Thanks for suggeting the following solution. The block starts with an initial speed of 18.0 m/s.Does it have any
  17. Physics

    Block A of mass 4.0 kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring constant 650 N m. The other end of the spring is attached to a wall. The block is pushed toward the wall until the spring has been
  18. physics

    If a person pushes on a block and it travels a distance of 6.0m before stopping. How far would the block travel if it were pushed with the same force, but on the moon(which has 1/6 of the earth's gravity).
  19. physics

    A jet plane is flying horizontally with a speed of 500 m/s over a hill that slopes upward with a 3% grade (i.e., the "rise" is 3% of the "run"). What is the component of the plane's velocity perpendicular to the ground? (Assume the +x-direction is up along
  20. Physics

    A block is sliding along a frictionless surface at a speed of 3.6 m/s. It hits a spring of spring stiffness constant k = 150 N/m. How far has the spring compressed when the block comes to a stop?
  21. physics

    A block is at rest on the incline shown in the figure. The coefficients of static and kinetic friction are μs = 0.7 and μk = 0.59, respec- tively. The acceleration of gravity is 9.8 m/s2 What is the frictional force acting on the 29 kg mass?
  22. physics

    A massless spring of constant k =60.9 N/m is fixed on the left side of a level track. A block of mass m = 0.7 kg is pressed against the spring and compresses it a distance d, as in the figure below. The block (initially at rest) is then released and
  23. physics

    A 280-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? rad/s
  24. Physics

    How would you set this up? A 250-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?
  25. physics

    A 310-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? rad/s
  26. geometry

    Please use this for the portfolio. You will need graph paper. 1. Start with Triangle ABC with vertices: A(0,2), B(2,5), C(3,0) 2. Find slope of side AB and BC 3. Now TRANSLATE the Triangle 4 units left, and 2 units up (x-4,y+2) and give the new vertices to
  27. physics

    A 5-newton block is being pulled up a ramp at a constant speed. The angle between the ramp and the horizontal is 30°. If the ramp is nearly frictionless, what is the magnitude of the force needed to pull the block?
  28. Physics

    A ball rolling on an inclined plane dors so with constant acceleration. One ball, A, is released from rest on the top of an inclined plane 18m long to reach the bottom 3s later. At the same time as A is released, another ball, B, is projected up the same
  29. Physics

    A box which has a mass of 14kg is sliding along a horizontal surface with a velocity of 18m/s when it encounters a frictionless inclined plane which meets the horizontal at an angle of 28 degrees. The box slides up the incline until it comes to a halt. How
  30. physics

    A skier of mass 72 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 2.7 m/s? (b) What power must a motor have to perform this task?
  31. physics

    A block is at rest on the incline shown in the figure. The coefficients of static and ki- netic friction are μs = 0.45 and μk = 0.38, respectively. The acceleration of gravity is 9.8 m/s2 . What is the frictional force acting on the 25 kg mass?
  32. bowie

    A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.
  33. Physics

    A box is sliding up an incline that makes an angle of 17.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.40 m/s.
  34. Physics

    A box is sliding up an incline that makes an angle of 13.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.80 m/s.
  35. Physics

    A box is sliding up an incline that makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30 m/s.
  36. physics

    A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.
  37. PHYSICS

    A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.
  38. physics

    A box is sliding up an incline that makes an angle of 21.8° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.170. The initial speed of the box at the bottom of the incline is 3.48 m/s.
  39. physics

    Can someone tell me if my answers are correct? A .145 kg block of wood hangs from the ceiling by a string. A bullet with a mass of .004 kg and a speed of 540 m/s strikes the block. After the collision, the block with the bullet embedded rises 42 cm up. a)
  40. physics

    a lawn mower is pushed up a 15degree slope by a 20lb force. Find the component acting parallel to the slope
  41. Physics

    A 2.32 kg block slide down a ramp from a height of 4.19 m. The block has a speed of 3.25 m/s when it reaches the bottom. There is friction. What is the work (in J) done by gravity? What is the work done by friction? I found the work of friction already.
  42. Physics: Work

    1st question: I was solving a question and I was asked the work done by friction. It is natural that work done by friction (a retarding force)should be negative and in my answer it was. However, just to be sure, work can be negative? 2nd question: A block
  43. Physics

    A wood block with a mass of 100 grams is held at the top of an inclined board (point A in Figure 2). If we assume force of friction (Ff) is 0.35N and constant as the block slides down the ramp, what will the velocity be at point B after the block is
  44. physics

    Starting from rest, a 5.0 kg block slides 2.5 m down a rough 30.0 degrees incline in 2.0s. Determine (a) the work done by the force of gravity. (b) the mechanical energy lost due to friction, and (c) the work done by the normal force between block and
  45. physics

    Three blocks on a frictionless horizontal surface are in contact with each other. A force F is applied to block A and the blocks start to slide to the right of their initial position. Determine the acceleration of the system, if m_A = 12 kg, m_B = 38 kg,
  46. Physics Help Needed

    Two blocks are connected by massless string that is wrapped around a pulley. Block 1 has a mass m1=6.90 kg, block 2 has a mass m2=2.30 kg, while the pulley has a mass of 1.70 kg and a radius of 12.2 cm. The pulley is frictionless, and the surface mass 1 is
  47. Physics Urgent please help

    A spring of negligible mass, spring constant k = 82 N/m, and natural length l = 1.2 m is hanging vertically. This is shown in the left side where the spring is neither stretched nor compressed. In the central one, a block of mass M = 5 kg is attached to
  48. physics

    A block of mass m = 0.605 kg is fastened to an unstrained horizontal spring whose spring constant is k = 67.5 N/m. The block is given a displacement of +0.120 m, where the + sign indicates that the displacement is along the +x axis, and then released from
  49. Physics Check My Work Please

    A 8 kg block is moving with an initial speed of 6 m/s on a rough horizontal surface. If the force is 12 N, approximately how far does the block travel before it stops? *I have: V^2=Vi^2+2ax 0=(6 m/s)^2 + 2(-9.8 m/s^2)(x) -36 m^2/s^2 = -19.6 m/s^2(x) x =
  50. Please Check: College Physics

    A 8 kg block is moving with an initial speed of 6 m/s on a rough horizontal surface. If the force is 12 N, approximately how far does the block travel before it stops? *I have: V^2=Vi^2+2ax 0=(6 m/s)^2 + 2(-9.8 m/s^2)(x) -36 m^2/s^2 = -19.6 m/s^2(x) x =
  51. physics

    A 7.0-g bullet is fired into a 1.5-kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 12.3 cm. Find the initial speed of the bullet?
  52. AP PHYSICS MECH.

    In Figure 9-62, block 2 (mass 1.3 kg) is at rest on a frictionless surface and touching the end of an unstretched spring of spring constant 160 N/m. The other end of the spring is fixed to a wall. Block 1 (mass 2.1 kg), traveling at speed v1 = 4.0 m/s,
  53. Physics

    A very narrow beam of white light is incident at 56.10° onto the top surface of a rectangular block of flint glass 12.7 cm thick. The indices of refraction of the glass for red and violet light are 1.640 and 1.663, respectively. Calculate the dispersion
  54. physic

    An object of mass m is at rest at the top of a smooth slope of height h and length L. The coefficient of kinetic friction between the object and the surface, μk, is small enough that the object will slide down the slope if given a very small push to
  55. physics

    A 3 kg block is released from rest at the top of a 20 m long frictionless ramp that is 5 m high. Find the values for the block just before it reaches ground level. (a) gravitational potential energy ----J (b) kinetic energy ----J (c) speed -----m/s (d)
  56. Physics

    A small block is attached to an ideal spring and is moving in SHM on a horizontal, frictionless surface. When the amplitude of the motion is 0.090m , it takes the block 2.68s to travel from x= 0.090m to x= -0.090m . If the amplitude is doubled, to 0.180m ,
  57. Physics

    A 5.0 kg block with a speed of 2.9 m/s collides with a 10 kg block that has a speed of 2.1 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.6 m/s. Suppose, instead, that
  58. Physics

    A 28 g block sits at the center of a turntable that rotates at 60 rpm. A compressed spring shoots the block radially outward from the center along a frictionless groove in the surface of the turntable. Calculate the turntable's angular speed when the block
  59. Physics

    A 4.36 kg block free to move on a horizontal, frictionless surface is attached to one end of a light horizontal spring. The other end of the spring is fixed. The spring is compressed 0.144 m from equilibrium and is then released. The speed of the block is
  60. RE: phhysics

    Posted by Charlene on Friday, March 23, 2007 at 3:00am. picture in your mind a block that slides without friction down a ramp that is inclined at an angle (q) above the horizontal. Initially the block is at rest a distance (s) in meters (measured along the
  61. physics

    A 4 kg wooden block rest on a table. the coefficient of friction between the block and the table is .40. a 5kg mass is attached to the block by a horizontal string passed over a frictionless pulley of neglible mass what is the acceleration of the block
  62. Physics

    A wodden block weighing 200 g is attached to a hanging weighing 45 g with a fine thread . The block is placed on a frictionless surface and after passing thrad over a smooth pulley , hanger is allowed to pull the block . Find the acceleration of the system
  63. algebra

    What is the slope of a line through (-5,2) and (6,7) in the standard(x,y) coordinate plane? Sorry, I forgot the choices F.9 G.5 H.-5 J. 5/11 K. -5/11 The main reason i can't figure this out is because I can't remember the slope formula. I need the slope
  64. Physics

    skier of mass 79 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 80 m up a 30° slope (assumed frictionless) at a constant speed of 3.4 m/s? 1 J (b) What power (expressed in hp) must a motor have to perform this
  65. physics

    A skier of mass 74 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 90 m up a 30° slope (assumed frictionless) at a constant speed of 3.0 m/s? J (b) What power (expressed in hp) must a motor have to perform this
  66. phys

    Doug pushes a 4.65 kg crate up a 2.00 m high 13.0° frictionless slope by pushing it with a constant horizontal force of 35.8 N. What is the speed (in m/s) of the crate as it reaches the top of the slope assuming that the local acceleration due to gravity
  67. physics

    A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal
  68. physics

    A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal
  69. Physics

    A moving 4.80 kg block collides with a horizontal spring whose spring constant is 243 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal
  70. Physics

    A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal
  71. Physics

    A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal
  72. Physics

    A bullet with mass (m) is fired vertically into a block of wood with mass (M) that is hanging from a rope at rest. If the billet has an initial speed Vi (initial velocity) find the height (h) that the block will swing into the air after the bullet becomes
  73. Math--Slope

    a) Why is Slope important when an airplane takes off. Explain. b) What might affect the slope of the plane at takeoff? Explain. Thanks.
  74. Physics

    A 290 g block is dropped onto a relaxed vertical spring that has a spring constant of k = 2.6 N/cm. The block becomes attached to the spring and compresses the spring 10 cm before momentarily stopping. (a) While the spring is being compressed, what work is
  75. Physics- Elena please help!

    A massless spring of constant k =84.8 N/m is fixed on the left side of a level track. A block of mass m = 0.5 kg is pressed against the spring and compresses it a distance d, as in the figure below. The block (initially at rest) is then released and
  76. Physics URGENT!!!

    A massless spring of constant k =84.8 N/m is fixed on the left side of a level track. A block of mass m = 0.5 kg is pressed against the spring and compresses it a distance d, as in the figure below. The block (initially at rest) is then released and
  77. Physics URGENT!!!

    : A massless spring of constant k =84.8 N/m is fixed on the left side of a level track. A block of mass m = 0.5 kg is pressed against the spring and compresses it a distance d, as in the figure below. The block (initially at rest) is then released and
  78. 11th grade

    A box is sliding up an incline that makes an angle of 16.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30m/s.
  79. physics

    A block of mass m sliding on a frictionless table is attached to a string that passes through a narrow hole through the center of the table. The block is sliding with speed v0 in a circle of radius r0. (Use any variable or symbol stated above as
  80. Physics

    A massive steel cable drags a 20kg block across a horizontal, frictionless surface. A 100N force applied to the cable causes the block to reach a speed of 4.2m/s in a distance of 2.1m . What is the mass of the cable?
  81. Physics

    What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.
  82. Phsics

    What force must be exerted on block A in order for block b not to fall. The coefficient of static friction between block A and B is 0.55, and the horizontal surface is frictionless. A= 100kg and B=10kg A is on the horizontal surface and B is attached to A.
  83. Physics

    A 60 kg block slides along the top of a 100 kg block with an acceleration of 4.0 m/s2 when a horizontal force F of 325 N is applied. The 100 kg block sits on a horizontal frictionless surface, but there is friction between the two blocks.
  84. physics

    A 3.0-kg block is on a frictionless horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 2.0 N) acting at an angle of 22° above the horizontal is applied to the block. At what rate is the force P doing work at t = 2.0 s? A. 2.3
  85. physics

    The goliath beetle, can reach a mass of 0.080 kg. Suppose a goliath beetle is placed on a slope that makes an angle of 37.0 degrees with the horizontal. Find the acceleration of the beetle along the slope, assuming the slope is frictionless. If a force of
  86. Math

    Find the slope intercept form of the line with the following properties. Slope=4 containing the points (-2,-5) I know that slope intercept form is y=mx+b so the m is the slope which is 4 but now I get confused since they give me x any y values (-2,-5). Is
  87. Math

    Find the slope intercept form of the line with the following properties. Slope=4 containing the points (-2,-5) I know that slope intercept form is y=mx+b so the m is the slope which is 4 but now I get confused since they give me x any y values (-2,-5). Is
  88. Physics

    A 5.1–kg block is pulled along a frictionless floor by a cord that exerts a force P = 12 N at an angle θ = 25° above the horizontal, as shown below. (a) What is the acceleration of the block? (b) The force P is slowly increased. What is the value
  89. College Physics

    A 7.00 g bullet, when fired from a gun into a 1.00 kg block of wood held in a vice, penetrates the block to a depth of 8.00 cm. If the block had instead been at rest on a frictionless horizontal surface, to what depth would the bullet have penetrated?
  90. Physics

    very narrow beam of white light is incident at 40.40° onto the top surface of a rectangular block of flint glass 11.8 cm thick. The indices of refraction of the glass for red and violet light are 1.637 and 1.671, respectively. Calculate the dispersion
  91. 2 masses, pulley on a frictionless incline

    an object of mass m1= 311 g on an inclined surface. The angle of the inclined surface is θ = 40o with the horizontal. The object m1 is connected to a second object of mass m2 = 355 g on the adjacent horizontal surface. Further, an external force of
  92. Physics - Mechanics

    A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the
  93. Physics - Mechanics

    A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the
  94. physic

    The block shown in Figure 6 has mass 3500 g and lies on a plane which tilted at an angle θ = 22° to the horizontal. The effective coefficient of kinetic friction is 0.20. Determine the acceleration of the block as it slides down the plane.
  95. physics

    A 5kg block has an initial velocity of 15 m/s and is sliding along a surface with friction. Eventually the block comes to rest. what is the change in thermal energy of the block and the surface ?
  96. Physics

    A 10 g bullet is fired into a 5 kg wooden block initially at rest on the floor. The bullet lodges in the block and the block slides 10 cm across the floor before coming to rest. If the coefficient of kinetic friction between the block and the floor is 0.5
  97. Physics

    The builders of the Great Pyramids of Egypt are thought to have used ramps to move the large 20,000 kg (22 ton) stone blocks into place at the construction site. To reduce friction, the Egyptians are assumed to have used rollers between the ramp and each
  98. Physics

    A 6.2 g bullet is fired into a 2 kg ballistic pendulum. The bullet emerges from the block with a speed of 281 m/s, and the block rises to a maximum height of 15 cm . Find the initial speed of the bullet. The acceleration due to gravity is 9.8 m/s 2 .
  99. Physics

    A cube of mass M=0.703 kg is placed on an incline and given a push. It slides down, and its speed down the incline is measured at two positions, [1] and [2] on the diagram below, with V1 = 0.923 m/s and V2 = 1.207 m/s. Note that the incline passes through
  100. 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?