# A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic frictions are 0.23 and 0.12 respectively. What is the minimum magnitude of the force F, parallel to the

22,562 questions, page 78
1. ## Science

A box weighing 20lb. is being pushed up an incline. If the angle of incline was 90° to the ground, what effort would be needed to push the mass? I don't get how to get the effort if an angle was in the problem.

asked by Christian on February 10, 2017

A cylindrical oil storage tank 12 feet in diameter and 17feet long is lying on its side. Suppose the tank is half full of oil weighing 85 lb per cubic foot. What's the total force on one endof the tank?

asked by Mishaka on March 12, 2012
3. ## physics

A box of books weighing 324 N is shoved across the floor by a force of 527 N exerted downward at an angle of 35 below the hori- zontal. The acceleration of gravity is 9.81 m/s2 . If μk between the box and the floor is 0.59, how long does it take to move

asked by Tanya on October 15, 2012
4. ## physics

a 700 newton man is able to climb up 4.5 meters on a 6 meters ladder before it slips. What must be the coefficient of friction be if the ladder is arranged so that it makes an angle 50 degrees with the ground? Assume the ladder to be uniform and weighing

asked by james on September 23, 2014
5. ## CALCULUS

A cylindrical oil storage tank 12 feet in diameter and 17feet long is lying on its side. Suppose the tank is half full of oil weighing 85 lb per cubic foot. What's the total force on one endof the tank?

asked by Mishaka on March 12, 2012
6. ## science

A shoe case weighing 40 lb is located on a scale inside a moving elevator that is going upward with the speed of 8 m/s. At time T1 elevator slows down with the acceleration of 3 m/s2 until the time T2. What are the the readings of the scale at T2 and T1

asked by james on July 25, 2012
7. ## chemistry

A sheet of gold of mass 100g and a teperature of 18.0 degrees is placed flat on a sheet of iron weighing 20g and at a temperature of 55.6 degrees. what is the final temperature of the combined metal.

asked by moses on February 24, 2014
8. ## physics

What force must be applied to push a carton weighing 220 N up a 20° incline, if the coefficient of kinetic friction is 0.39? Assume the force is applied parallel to the incline and the velocity is constant

asked by Sam on November 14, 2011
9. ## Physics

How much work is done when a mass of 3 kg (weighing 30 N) is lifted vertically through 6 m?. A hiker climbs a hill 300 m high. If she has a mass of 50 kg calculate the work she does in lifting her body to the top of the hill.

asked by Rainzz on February 24, 2018
10. ## calculus

a shoot putter put the shoot with an initial velocity of 25m/s at an angle of 32 degree from the horizontal. determine the horizontal and vertical velocity of the shoot

asked by fran on February 5, 2013
11. ## physics

A traveler pulls on a suitcase strap at an angle 36 above the horizontal. If 555 J of work are done by the strap while moving the suitcase a horizontal distance of 15 m, what is the tension in the strap?

asked by Anonymous on October 27, 2014
12. ## Physics

A traveler pulls on a suitcase strap at an angle 36 above the horizontal. If 555 J of work are done by the strap while moving the suitcase a horizontal distance of 15 m, what is the tension in the strap?

asked by Anonymous on October 27, 2014
13. ## 11th matriculation physics kinematics

an aeroplane takes of at an angle of 45deg to the horizontal. If the vertical component of its velocity is 300kmph, Calculate its actual velocity. what is the horizontal component of it velocity?

asked by shruthi on July 18, 2010
14. ## Physics

A 3.1 kg ball is tied to a string and swung in a horizontal circle at a speed of 7.2 m/s. the radius of the circle is 2.2 m. What angle does the string make with the horizontal? What is the tension in the string?

asked by Stephanie on June 21, 2012
15. ## Physics

A traveler pulls on a suitcase strap at an angle 28° above the horizontal. If 1,266 J of work are done by the strap while moving the suitcase a horizontal distance of 50 m, what is the tension in the strap?

asked by job on March 5, 2017
16. ## Physics

Mathematically determine the resultant force if two forces A and B act on an object. Force A is 85N and is at an angle of 20• to the horizontal. Force B is 125N and is at an angle of 60• to the horizontal.

asked by Christian on October 11, 2012
17. ## Physics

B___A (inclined at 55 degree) /| /\ / | / \ Pull 3900N / |/ D---C | /| | / | |/ | F---E | /| | / | |/ | H---G (All is Pin Joint) Distance DC = FE = HG = AB = 2.7m FH = FD = GE = EC = CB = 2 m Find the supporting reaction of H, Member BD (Tension Force),

asked by Stupid Alex on June 7, 2012
18. ## Calculus

An air traffic controller spots 2 planes at the same altitude converging on a point as they fly at right angles to each other. One plane is 150 miles from the point moving at 450 miles per hour. The other plane is 200 miles from the point moving at 600

asked by Alexis on October 25, 2011
19. ## math

NOTE: this is for advanced functions, NOT physics A 2m length of board rests with one end on the floor and the other end on a small stack of bricks. A baseball is rolled up the board and back down again in a total of 4 seconds. The farthest the baseball

asked by Elbert on March 14, 2013
20. ## Urgent - physics

Air molecules and dust particles in the atmosphere will scatter sunlight. From a consideration of the position of the sun, estimate the direction of incidence of the sun's rays on the atmosphere. In what direction will an observer on the earth's surface

asked by Nick on June 10, 2015
21. ## Physics

a container weighing a 1.20 x 10^4 N sits on a hydraulic press piston with can area of 0.80m^2. Compressed ir exerts a force of on the second piston which has an area of 0.30m^2 How large must this force be to support the car

asked by Dulce on September 29, 2014
22. ## Maths/physics need help agn

A hand bag containing some loads weighing 162n is carried by two student, each holding the handle of the bag next to him..if each handle is pulled 60degree to the vertical find the force of each student? Help plz

asked by Collins on January 1, 2016
23. ## Physics

A man uses a crowbar 1.5 meter long to lift a rock weighing 600 newton. If the fulcrum is 0.50 meter from the end of the bar touching the rock, how much effort must the man apply?

24. ## physics

A uniform plank of seesaw is 5meter long.a boy weighing40kgf sits 1.5meter from the one end.what will be the distance of a girl weighing 25kgf sit at other end,so as to balance the seesaw.

asked by nitesh srivastava on April 29, 2015
25. ## physics

A staging that weighs Wstaging supports a painter weighing 560 N. The reading on the left scale is 610 N and the reading on the right scale is 460 N. What is the weight of the staging? Answer in units of N.

asked by maria on March 20, 2011
26. ## Physics

You lower a bundle weighing 64.0 kg to the ground with a rope that will snap if the tension exceeds 578.2 N. If the height is 8.0 m and you barely avoid snapping the rope, what speed will the bundle hit the ground?

asked by John on September 30, 2008
27. ## physics

A staging that weighs Wstaging supports a painter weighing 620 N. The reading on the left scale is 660 N and the reading on the right scale is 410 N. What is the weight of the staging? Answer in units of N

asked by Evans on September 1, 2013
28. ## Physics

a uniform beam 6.0m long and weighing 4kg rest support p and q place left and right 1.0m of beam of weight from each of the beam weight of mass 10kg and 8kg and are placed near p and q respectively on each of the beam. calculate the reaction of p and q

asked by Olalekan on February 23, 2017
29. ## physics

A ball weighing 1.78 N is shot through a launcher, achieving a speed ( from rest) of 41 m/s in 0.28 s. A) What is the mass of the ball? B) What is the acceleration of the ball as it moves through the launcher? C) What average force acted on the ball to

asked by mack on November 19, 2011
30. ## Physics

a uniform beam 6.0m long and weighing 4kg rest support p and q place left and right 1.0m of beam of weight from each of the beam weight of mass 10kg and 8kg and are placed near p and q respectively on each of the beam. calculate the reaction of p and q

asked by Olalekan on February 23, 2017
31. ## physics

A copper of mass 400g is heated until it's temperature becomes 250degree celcius. It is dropped into water weighing 200g at 50 degree celcius.calculate the mass of water vapour produced.

asked by christy on February 24, 2016
32. ## physices

A physics book slides off a horizontal table top with a speed of 1.30 m/s . It strikes the floor after a time of 0.380s . Ignore air resistance. Find the height of the table top above the floor. Find the horizontal distance from the edge of the table to

asked by wala'a sami on April 8, 2011
33. ## Physics

A physics book slides off a horizontal table top with a speed of 1.30 m/s . It strikes the floor after a time of 0.380s . Ignore air resistance. Find the height of the table top above the floor. Find the horizontal distance from the edge of the table to

asked by Sean on February 16, 2014
34. ## Physics

A person weighing 0.6 kN rides in an elevator that has a downward acceleration of 2.3 m/s^2. The acceleration of gravity is 9.8 m/s^2. What is the magnitude of the force of the elevator ﬂoor on the person? Answer in units of kN

asked by sam on September 24, 2012
35. ## physical science

A small car with a weight of 2000 lb traveling at 30 mph can stop in about 100 ft. How far does it take for a large SUV weighing 8000 lb to stop if it is also traveling at 30 mph?

asked by Fonda on December 15, 2011
36. ## Physics

The density of gold is 19 times that of water. If you take a gold crown weighing 32 N and submerge it in water, how much upward force must you exert on the submerged crown to keep it from accelerating?

asked by Kelsey on October 8, 2013
37. ## physics

The density of gold is 19 times that of water. If you take a gold crown weighing 24 N and submerge it in water, how much upward force must you exert on the submerged crown to keep it from accelerating?

asked by ann on April 12, 2011
38. ## physics

a uniform pole 20 ft. long and weighing 80 lb. is suspected by a boy 2.0 ft.from end A and a man 5.0 ft. from end B .at what point should a load of 100 lb. be placed on so that the man will support twice as much as the boy?

asked by herher on September 7, 2015
39. ## chemistry

The calcium phosphate in a phosphate rock weighing 7.4kg was found to be 477.92mg. What is the concentration of calcium and phosphorous in ppm in the rock sample.

40. ## physics

The density of gold is 19 times that of water. If you take a gold crown weighing 24 N and submerge it in water, how much upward force must you exert on the submerged crown to keep it from accelerating?

asked by ann on April 13, 2011
41. ## physics

A projectile is launched from and returns to ground level, as the figure shows. There is no air resistance. The horizontal range of the projectile is measured to be R= 166 m, and the horizontal component of the launch velocity is v0x = 26.0 m/s. Find the

asked by chris on December 16, 2015
42. ## physics

a projectile with a muzzle velocity of 550 m/s is fired from the a gun on top of a cliff 460 m above the sea level at a certain angle with respect to the horizontal. if the projectile hits the ocean surface. 49.2 seconds after being fired, determine the

asked by jennierson on May 4, 2013
43. ## physics

Energy & Momentum Calculations Assessment Answer the following questions. A 1.0 kg puck sliding at 15 m/s along some horizontal frictionless ice strikes and compresses a horizontal spring attached to one end of the ice rink. If the spring has a constant of

asked by grey on June 8, 2014
44. ## physics

A car rolls down a 13.0° slope for 50.0 m, accelerating at 2.90 m/s2. Leaving the cliff at 13.0° below the horizontal, with the velocity it acquired from rolling downhill, the car falls 26.0 m to the rocks below, bursting into flame upon impact. What

asked by john on October 30, 2010
45. ## Physics

A box is being pulled along a rough horizontal surface by a rope which has a tension of 10N at an angle of 60 degrees with the horizontal. If the box moves with constant velocity find the frictional force and the normal reaction force given the weight of

asked by Arusham on May 1, 2017
46. ## Math

What is meant by the terms vertical and horizontal asymptotes Here is a nice graph with vertical and horizontal asymptotes. THe dotted lines are the asymptotes. http://www.mathnstuff.com/math/spoken/here/2class/300/fx/library/234/n1oxp4.gif

asked by Marsia on July 18, 2007
47. ## physics

Children sled down a 44m -long hill inclined at 27∘ . At the bottom, the slope levels out. If the coefficient of friction is 0.11, how far do the children slide on the level ground? Express your answer using two significant figures.

asked by Anonymous on February 16, 2015
48. ## Physics

Rain is falling vertically down on a car moving at 11 m/s. Tracks made by the raindrops on the side window of the car are inclined at 55 degrees with the vertical. Find the speed of the raindrop relative to the ground.

asked by Tsunayoshi on November 2, 2013
49. ## Physics

Rain is falling vertically down on a car moving at 11 m/s. Tracks made by the raindrops on the side window of the car are inclined 55 degrees with the vertical. Find the speed of the raindrop relative to the ground.

asked by Tsunayoshi on November 2, 2013
50. ## Physics

Rain is falling vertically down on a car moving at 11 m/s. Tracks made by the raindrops on the side window of the car are inclined at 55 degrees with the vertical. Find the speed of the raindrop relative to the ground.

asked by Tsunayoshi on November 3, 2013
51. ## Dynamics

A boy running a foot race rounds a flat curve of 50 ft radius. If he runs at rate of 15 mph, at what angle with the vertical will be inclined his body? A.) 16.75° B.) 13.67° C.) 76° show solution step by step thanks

asked by Carl on July 14, 2018
52. ## pre-calc

y=10(0.5)^(t/19.74) My question: is this a horizontal stretch by a factor of 19.74? y=10(0.5)^(8t) My question: is this a horizontal compression by a factor of 1/8? y=10(0.5)^x + 1 My question: is this a vertical translation of up 1 unit? y=10(0.5)^(x-1)

asked by Jus on May 19, 2009
53. ## Physics

A body weighing 500N is sitting on a seesaw at a point 2m away from the pivot what should the pivot at a point 4m away to balance the pivot

asked by Kewlani on October 16, 2018
54. ## Physics

A steel (Young's modulus 2.0 x 1011 N/m2) wire is strung between two supports attached to a ceiling. Initially, there is no tension in the wire when it is horizontal. A 98-N picture is then hung from the center of the wire, as the drawing illustrates, so

asked by Samantha on November 23, 2013
55. ## physics

A steel (Young's modulus 2.0 x 1011 N/m2) wire is strung between two supports attached to a ceiling. Initially, there is no tension in the wire when it is horizontal. A 88-N picture is then hung from the center of the wire, as the drawing illustrates, so

asked by robert on April 14, 2012
56. ## physics

A 125 kg crate rests on the flatbed of a truck that moves at a speed of 15.0 m/s around an unbanked curve whose radius is 66.0m. This crate does not slip relative to the truck. Obtain the magnitude of the static frictional force that the truck bed exerts

asked by Lynda on November 3, 2010
57. ## pulley and rotation

Two masses, mA = 35.0 kg and mB = 42.0 kg, are connected by a rope that hangs over a pulley (as in the figure). The pulley is a uniform cylinder of radius 0.50 m and mass 4.8 kg. Initially mA is on the ground and mB rests 2.5 m above the ground. If the

asked by Anonymous on March 11, 2010
58. ## physics

A force of 30 N pulls a mass left at 30 degrees to the horizontal and one of 100 N pulls right at 120 degrees. If the mass of the mass which is 50 kg, find the acceletation if coeffcient of sliding is .01? What would be the equation of this problem? If you

asked by randy on November 20, 2006
59. ## Physics

I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6-kg block of ice has a temperature of -14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final

asked by Sam on April 13, 2008
60. ## Physics

I was having trouble with two different physics problems when studying for a test. Any help is appreciated. 1.) A 11.6-kg block of ice has a temperature of -14.5 °C. The pressure is one atmosphere. The block absorbs 6.87 x 106 J of heat. What is the final

asked by Sam on April 13, 2008
61. ## Phy

A wooden frame weighing 20N is hung on a nail using a two ropes as shown below find the tension in the rope. The left side has 50¡ã under it is T and The right side hast 50¡ã under it is T /\ / \ |50¡ã/ \50¡ã| _|__/_T_____T_\_|_ | | | |

asked by Aigbuduokhai on March 17, 2016
62. ## Phy

A wooden frame weighing 20N is hung on a nail using a two ropes as shown below find the tension in the rope. The left side has 50¡ã under it is T and The right side hast 50¡ã under it is T /\ / \ |50¡ã/ \50¡ã| _|__/_T_____T_\_|_ | | | |

asked by Aigbuduokhai on March 17, 2016
63. ## physics

hi.A vehicle weighing 1.3 tonne leaves skid marks 23 meters long.After 15 meters it hit pedestrain.The co efficient of friction is .7 .what was vehicle initial speed at start of skid and at impact.thanks

asked by glenn on February 5, 2013
64. ## math

hi.A vehicle weighing 1.3 tonne leaves skid marks 23 meters long.After 15 meters it hit pedestrain.The co efficient of friction is .7 .what was vehicle initial speed at start of skid and at impact.thanks

asked by glenn on February 5, 2013
65. ## Physics

A 25.2 kg block of wood is pulled across a floor at a constant 9.74 m/s with a constant 62.7 N force. The bottom of the box has a surface area of 65.1 cm2. If the block was put on its side (which has twice the surface area of the bottom) and pulled with

asked by Ron on January 4, 2016
66. ## Physics

A particular Ferris wheel (a rigid wheel rotating in a vertical plane about a horizontal axis) at a local carnival has a radius of 20.0 m and it completes 1 revolution in 9.84 seconds. (a) What is the speed (m/s) of a point on the edge of the wheel? Using

asked by waqas on August 6, 2011
67. ## physics

A 125.0-N sign is suspended from a horizontal strut of negligible weight. The force exerted on the strut by the wall is horizontal. Draw an FBD to show the forces acting on the strut. (Do this on paper. Your instructor may ask you to turn in this work.)

68. ## 5 Pre-Calculus Questions

1. What is the value of x in the right triangle below? If needed, round your answer to two decimal places. 32 angle, 15 inches, find the x in base… 2. A 10-foot ladder is leaning up against the side of a building so that the top of the ladder reaches the

asked by Anonymous on June 30, 2011
69. ## College Physics

Suppose a 10.0 kg fireworks shell is shot into the air with an initial velocity of 62.0 m/s at an angle of 80.0 degrees above the horizontal. At the highest point of its trajectory, a small explosive charge separates it into two pieces, neither of which

asked by Marqueta on December 3, 2014
70. ## Physics

The rigid object shown in Fig. 10-63 consists of three balls and three connecting rods, with M = 1.5 kg, L = 0.67 m, and θ = 32°. Fig. 10-63 The balls may be treated as particles, and the connecting rods have negligible mass. Determine the rotational

asked by Tim on July 28, 2010
71. ## Physics

A ballistic pendulum consists of an arm of mass M and length L = 0.52 m. One end of the arm is pivoted so that the arm rotates freely in a vertical plane. Initially, the arm is motionless and hangs vertically from the pivot point. A projectile of the same

asked by mymi on October 24, 2011
72. ## physics

Jupiter's gravitational field at the surface is approximately three times that of the earth. A person weighing 120 lb. on the earth's surface would weigh how much on Jupiter?

asked by Leo on June 17, 2012
73. ## chemistry

a metal weighing 20.32 g is added to a flask with a volume of 24.5ml. it is found that 18.52 g of water must be added to fill tha flask what is the density of metal

asked by marie on September 15, 2010
74. ## Physics

A 15 N wooden block is dragged for 15 meters across a wooden floor in 15 seconds... I'm given that the mew (the greek leter uk) or however u say it is .2 I have to make a free body diagram I sloved and got Fn = 15 N mg = -15 N Ff = -3 N How do I solve for

asked by Physics on March 18, 2009
75. ## math

Nancy wants to make a graph to show the relationship between the temperature of water, in degrees Celsius, and the time, in minutes, for which water is heated. She plots the following points: (0, 50), (1, 60), (2, 70), (3, 80), (4, 90) She uses the

asked by oscar on September 4, 2015
76. ## math

A ladder that is 12,5m long rests against a wall with its foot 7,5m away from the wall.How far the ladder reaches up the wall?

asked by Octivia on August 25, 2011
77. ## physics

A crate rests on a flatbed truck which is initially traveling at 17.8 m/s on a level road. The driver applies the brakes and the truck is brought to a halt in a distance of 33.1 m. If the deceleration of the truck is constant, what is the minimum

asked by confused on October 2, 2014
78. ## Physics 1

A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.749 rad/s2. After what

asked by Emily on April 1, 2013
79. ## physics

Question Part Points Submissions Used A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. The plate is 6.50 cm thick (vertical dimension) and is covered with a layer of water (n = 1.33) 15.0 cm deep. Calculate the apparent thickness of

asked by Anonymous urgent on March 17, 2016
80. ## chem

A sample of PCl5 weighing 2.69 grams is placed in a 1.000 liter flask and vaporized completely at 250 o C. The final pressure observed at this temperature is 1.000 atmospheres. Note that some, but not all of the PCl5 decomposes according to the equation:

asked by laura on December 6, 2011
81. ## Chemistry

A sample of benzene, C6H6, weighing 3.51 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the calorimeter rose from 25.00 C to 37.18 C. If the heat capacity of the calorimeter is 12.05 kJ/K, what is the molar energy of

asked by Marie on March 17, 2010
82. ## Chemistry - Quantitative analysis

A mixture weighing 7.290 mg contained only cyclohexane, C6H12 (FM 84.159), and oxirane, C2H4O (FM 44.053). When the mixture was analyzed by combustion analysis, 21.999 mg of CO2 (FM 44.010) were produced. Find the weight percent of oxirane in the mixture.

asked by RJ on January 16, 2012
83. ## Physics

A solid circular disk has a mass of 1.67 kg and a radius of 0.144 m. Each of three identical thin rods has a mass of 0.351 kg. The rods are attached perpendicularly to the plane of the disk at its outer edge to form a three-legged stool (see the figure).

asked by StressedStudent on November 3, 2012
84. ## physical science

A builder pushes a wheelbarrow loaded with sand ,from rest at point A,up a ramp of unknown length ,which is inclined at unknown angle ,vertical height of unknown 2,75m

asked by lucky on April 7, 2013
85. ## Physics

An airplane pulls into a vertical loop, and has horizontal and vertical velocities Vx=90m/s and Vy=120m/s. If the radius of curvature of the flight path is R=900m, and the airplane has a vertical acceleration Ay=11m/s^2, determine its tangential and

asked by J.T. on July 13, 2015
86. ## Physics

A boy whirls a stone in a horizontal circle of radius 2.0 m and at height 2.2 m above level ground. The string breaks, and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 9.7 m. What is the magnitude of the

asked by barich on September 25, 2015
87. ## physics

A boy whirls a stone in a horizontal circle of radius 1.3 m and at height 2.0 m above level ground. The string breaks, and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 9.8 m. What is the magnitude of the

asked by Antonio on September 13, 2010
88. ## physics

A 40N force applied at an angle of 37 degrees above the horizontal pulls a 5kg box on a horizontal floor. the acceleration of the box is 3meter per second square. how large a frictional force must be retarding the motion of the box. a.50N b.13N c.17N d.25N

asked by ali on April 20, 2012
89. ## physics

A boy whirls a stone in a horizontal circle of radius 1.9 m and at height 2.1 m above ground level. The string breaks, and the stone flies horizontally and strikes the ground after traveling a horizontal distance of 10 m. What is the magnitude of the

asked by Sam on July 10, 2010
90. ## Physics

A golf ball is stuck at point o on the ground and moves with an initial velocity of 20ms-1 at an angle of 53 degrees to the horizontal.The ball subsequently lands at a point x which is on the same horizontal levelas o. a) show that the time taken by the

asked by 0ooooooooo0 on September 28, 2017
91. ## Physics

Suppose the water near the top of Niagara Falls has a horizontal speed of 2.3 m/s just before it cascades over the edge of the falls. At what vertical distance below the edge does the velocity vector of the water point downward at a 55° angle below the

asked by Will on April 1, 2008
92. ## physics

A bullet is fired at an initial velocity of 300 m/s from the top of a cliff 150 m high. Find the initial horizontal and vertical components, horizontal and vertical displacement, displacement upon reaching the ground.

asked by ellah on January 9, 2012
93. ## Physics

A projectile is fired at 12.5 m/s at an angle of 53.1 with the horizontal from a point 75m above the ground. A) How long does it take to reach the ground? B)What max height does it reach? C) What horizontal distance does it travel before striking the

asked by Kitty on September 27, 2015
94. ## Physics

A weight of 4.33 N is suspended by the string fasten at its upper end. A horizontal force is applied to the weight so that the string makes an angle of 30 degrees with the vertical. Find the horizontal force and the tension in the spring.

asked by Muazzif on March 13, 2011
95. ## Physics

A crank of length 190mm is initially at 65 degree above the horizontal, and rotates through 35 degree towards the horizontal. A vertically downward force of 160 N acts on the outer end of the crank. Calculate the work done by the force.

asked by Alex on October 17, 2012
96. ## physics

Two boxes (b1 = 23 kg and b2 = 57 kg) are being pushed across a horizontal frictionless surface, as the drawing shows. The 48-N pushing force is horizontal and is applied to the 23-kg box, which in turn pushes against the 57-kg box. Find the magnitude of

asked by cody on February 10, 2012
97. ## Physics

A bullet is fired from a rifle that is held 2.5 m above the ground in a horizontal position. The initial speed of the bullet is 1450 m/s. Find: (a) the time it takes for the bullet to strike the ground and (b) the horizontal distance traveled by the

asked by Matt on October 17, 2014
98. ## geometry

A triangle is formed where line segment AC and line segment BC have the same length. If the measure of angle ACB = 81 degrees, find the measures of angles x and y so that the top horizontal line will be parallel to the bottom horizontal line.

asked by Sally on July 28, 2010
99. ## physics

A girl throws a water-filled balloon at an angle of 50.0∘^\circ above the horizontal with a speed of 12.0m/s{\rm m}/{\rm s} . The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of

asked by joe on May 17, 2014
100. ## physics

In 5.20 h, a balloon drifts 6.5 km north, 2.00 km east, and 2.76 km in upward elevation from its release point on the ground. (a) Find the magnitude of its average velocity. . km/h (b) Find the angle its average velocity makes with the horizontal. . °

asked by Anonymous on November 28, 2011