# 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 183
1. ## physics

A fire hose ejects a stream of water at an angle of 36.4 ° above the horizontal. The water leaves the nozzle with a speed of 20.1 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by Allyson on September 10, 2013
2. ## math

weloo. Consider the function f(x)= -cos3x -4sin3x. (a)Find the equation of the line normal to the graph of f(x) when x= pie/6 . (b)Find the x coordinates of the points on the graph of f(x) where the tangent to the graph is horizontal. (c)Find the absolute

asked by weloo_volley on May 8, 2012
3. ## Physics/trig

A fire hose ejects a stream of water at an angle of 33.6 ° above the horizontal. The water leaves the nozzle with a speed of 29.6 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by Jenna on October 9, 2015
4. ## Physics

A 1,280-kg car pulls a 350-kg trailer. The car exerts a horizontal force of 3,600-N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective friction coefficient of 0.15 for the trailer.

asked by Breauna on March 18, 2015
5. ## physics

A fire hose ejects a stream of water at an angle of 38.3 ° above the horizontal. The water leaves the nozzle with a speed of 29.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by chelsea on January 31, 2012
6. ## Physics

A rope exerts a constant horizontal force of 203N pulling a 68-kg crate across the floor. The velocity of the crate is observed to increase from 3m/s to 5m/s in a time of 4 seconds under the influence of this force and the frictional force exerted by the

asked by Tim on June 21, 2013
7. ## physics

A fire hose ejects a stream of water at an angle of 35.0º above the horizontal. The water leaves the nozzle with a speed of 25.0 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by paul on September 19, 2013
8. ## Physics

A fire hose ejects a stream of water at an angle of 30.9° above the horizontal. The water leaves the nozzle with a speed of 26.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by Cetris on February 28, 2015
9. ## physics

A fire hose ejects a stream of water at an angle of 31.7 ° above the horizontal. The water leaves the nozzle with a speed of 29.2 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by Kristyn on March 25, 2015
10. ## physics

A fire hose ejects a stream of water at an angle of 32.2 ° above the horizontal. The water leaves the nozzle with a speed of 26.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by louis aaaa on June 23, 2013
11. ## physics

A fire hose ejects a stream of water at an angle of 31.7 ° above the horizontal. The water leaves the nozzle with a speed of 29.2 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by Kristyn on March 25, 2015
12. ## Help please I am lost, algebra

I have notes on this from online but they are different from this problem and I don't know how to solve it. Find the equation of a line with the given information: slope -5/4 and g(14)=-6 It is asking for, point slope form, slope intercept form, Function

asked by Sam on March 23, 2017
13. ## physics

A fire hose ejects a stream of water at an angle of 33.4 ° above the horizontal. The water leaves the nozzle with a speed of 20.1 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by V on February 5, 2015
14. ## Physics

A fire hose ejects a stream of water at an angle of 35.8 ° above the horizontal. The water leaves the nozzle with a speed of 21.9 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by Nicole on December 13, 2015
15. ## Physics

A fire hose ejects a stream of water at an angle of 29.0° above the horizontal. The water leaves the nozzle with a speed of 31.0 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by Anonymous on September 18, 2012
16. ## physics

A fire hose ejects a stream of water at an angle of 31.5 ° above the horizontal. The water leaves the nozzle with a speed of 24.3 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

asked by ray on September 19, 2012
17. ## UNIVERSITY PHYSICS 1

as she pick up her riders a bus driver traverses four successive displacements represented by the expression (-6.30 b)i-(4.00 b cos 40)i-(4.00 sin 40)j+(3.00 b cos 50)i-(3.00 b sin 50)j-(5.00 b)j here b represents one city block,a convenient unit of

asked by JOAN on November 24, 2012
18. ## PHYSICS 1 ..

as she pick up her riders a bus driver traverses four successive displacements represented by the expression (-6.30 b)i-(4.00 b cos 40)i-(4.00 sin 40)j+(3.00 b cos 50)i-(3.00 b sin 50)j-(5.00 b)j here b represents one city block,a convenient unit of

asked by JOAN on November 25, 2012
19. ## Chemistry

heat of combustion of propane c3h8, 2220KJ/mol. the specific heat of copper is 0.385 J/g*C. How many grams of propane must be burned to raise the temperature of a 10.0kg block of copper from 25.0 C to 65.0 C,assuming none of the heat is lost to the

asked by Cassandra on March 30, 2015
20. ## computer science / app development?

If anyone here is familiar with AppInventor.... 0 down vote favorite I have a database of events in AppInventor containing information such as location, description, and tags. I want to include a search by location screen of an app where the user clicks

asked by anonymous on March 25, 2018
21. ## physicalcs

A block having a mass of m=15 is suspended via two cables. The angles are as follows: a=19-degree, and b=26-degrees. a) write an expression for the sum of the forces in the x direction in terms of T1, T2, m, g, angle a and b. Use the specified coordinate

asked by dalia on February 13, 2017
22. ## Calculus

An airplane flies at an altitude of 5 miles toward a point directly over an observer. The speed of the plane is 600 mi/hr. Find the rate at which the angle of elevation is changing when the angle is 30 degrees. I found the answer to be 60 radians/hr by

asked by Katie on November 19, 2009
23. ## calculus

The force F (in Newtons) required to move a box of mass m kg in motion by pulling on an attached rope is F(x) = f m g/(cos(x))+ f (sin(x)) where x is the angle between the rope and the horizontal, f is the coefficient of static friction and g = 9.8 m/s^2.

asked by nate on November 14, 2011
24. ## physics

A 1200 kg car on a horizontal surface starts from rest and accelerates uniformly to 72 km/h in 20.0 s. Friction exets an average force of 450 N on the car during this time. a) what is the net work done on the car b) how far does the car move during this

asked by jj on September 28, 2011
25. ## Science/Math

Calculate the angle of incident of beam radiation on a surface located at 45 degree north and 89.4 degree longitude, at 2:41 pm clock time (local standard time) on February 3, if the surface is tilted 30 degree from the horizontal pointed 10 degree east of

asked by Margaret Alire on September 17, 2012
26. ## physics

Question Part Submissions Used A 3.25-kg object is attached to a vertical rod by two strings as shown in the figure below. The object rotates in a horizontal circle at constant speed 6.60 m/s. (a) Find the tension in the upper string. N (b) Find the

asked by mary on March 27, 2016
27. ## math

The force F (in Newtons) required to move a box of mass m kg in motion by pulling on an attached rope is F(x) = f m g/(cos(x))+ f (sin(x)) where x is the angle between the rope and the horizontal, f is the coefficient of static friction and g = 9.8 m/s^2.

asked by ali on November 17, 2011
28. ## physics sl

A dead dog of mass 2.2 kg and an initial speed of 5.5 m.s-1 slides along a rough horizontal surface and stops after travelling 4.2 m. calculate the frictional force between the dog and the surface (Think of the work the friction has to do to stop the dog

asked by samuel on October 4, 2015
29. ## Physics

A box of sand (initially at rest) is pulled along a horizontal floor by a cable with a breaking strength of 1090.0 N. The coefficient of static friction between the box and the ground is 0.28. What should the angle between the cable and the floor be in

asked by Marlerne on March 20, 2014
30. ## physics

A shopper pushes a grocery cart 20m at constant speed on level ground against a 35N frictional force. He pushes in a direction 25 degrees below the horizontal. What is the work done on the cart by gravity? I know you can use W=Fdcos(theta) where

asked by Juliette on October 4, 2010
31. ## physics

A metal Bob of mass0.6kg is attracted to the end of a string of length1m.the Bob is whirled in a horizontal circle with a uniform speed of12m/s.what is the centripetal force acting on the Bob .if the speed of the Bob is5m/s Calculate the tension of the

asked by angel varghesh on September 28, 2015
32. ## physics

A horizontal force of 50N is applied to a 2.0Kg trolly, initially at rest, and it moves a distance of 4.0m along a level, frictionless. The force then changes to 20N and acts for an aditional distance of 2.0m. a) what is the the final kinetic energy of the

asked by Alemu on December 3, 2009
33. ## PHYSICS

you need to move a 500 kg crate of gazelle food from the garage along the 42 meter hall to the kitchen. If you apply a force of 1000 N at a 37 degree angle to the horizontal. How long will it take to move to the kitchen?(coefficient of static friction=.15,

asked by HELP!!! on September 26, 2007
34. ## physics

A train with a mass of 120Mg accelerates uniformly on a horizontal track.The resistance to movement is 5N per KN of the mass of the train.the force in the draw bar of locomotive is 80KN..calculate:1force reqqured for constant speed. 2.the force that causes

asked by mashao on April 7, 2015
35. ## physics

A ball is projected horizontally from the edge of a table that is 1.2 m high, and it strikes the floor at a point 1.11 m from the base of the table.The acceleration of gravity is 9.8 m/s2 .How high is the ball above the floor when its velocity vector makes

asked by monica on September 20, 2011

An 60 kg skier is sliding down a ski slope at a constant velocity. The slope makes an angle of 13° above the horizontal direction. (a) Ignoring any air resistance, what is the force of kinetic friction acting on the skier? in N (b) What is the coefficient

asked by Anonymous on February 13, 2012
37. ## Physics

You like to swim at a nearby lake. On one side of the lake is a cliff, and the top of the cliff is 69 m above the surface of the lake. You dive of the cliff doing somersaults so as to have an angular speed of 5.5 rev/s. How many revolutions do you make

asked by Anon on October 11, 2011
38. ## help me maths anyone

A vertical radio mast is supported by 3 equal wires.One end of each wire is fixed to the top of the mast and the other ends form an equilateral triangle on horizontal ground.If the length of each wire is twice the height of the mast,find the angle btw any

asked by feliz on June 1, 2017
39. ## physics

A ball within an initial velocity of 5.55 m/s is shot at an angle of 30 degree above the horizontal using a launcher. The launcher is 1.11 high. a. How long is the ball in the air, before it hits the ground? b. How far from the launcher does the ball land

asked by sea lively on October 8, 2018
40. ## physics

A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the right as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal

asked by Vicki on January 19, 2012
41. ## Physics

Which of the following is correct for the reflected ray if a light ray strikes a plane mirror at an angle of 50° from the normal? a. 40° from the surface of the mirror b. 40° from the normal c. 50° from the surface of the mirror d. 90° from the normal

asked by Jordan on July 12, 2013
42. ## Physics

The magnetic vector of a plane electromagnetic wave is described as follows: B⃗ =Bmxˆsin[13 rad/m z− 3.90e9 rad/sec t] where Bm>0. This represents the full magnetic field, so that By=Bz=0. (a) What is the wavelength λ of the wave, in meters? (b) What

asked by Annoyingmous on May 22, 2013
43. ## Physics Circular Motion

The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 7.0 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point

asked by Jayesh on February 20, 2015
44. ## Physics

A 1200 kg car pulls a 510 kg trailer. The car exerts a horizontal force of 4040 N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective friction coefficient of 0.160 for the trailer.

asked by Sandy on October 25, 2014
45. ## Physics

An athlete whirls a 7.36 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.07 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.

asked by Bret on January 28, 2013
46. ## physics

The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.07 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point

asked by heather on February 23, 2011
47. ## Physics

An athlete whirls a 7.36 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.07 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain

asked by O'Brien on January 28, 2013
48. ## Physics

The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.7m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point

asked by Natasha on February 18, 2012
49. ## physics

A fire hose a stream of water at an angle of 35degree above the horizontal. The water leaves the nozzle with a speed 25m/s. Assuming that the water behave like a projectile ,how far from a building should the fire hose be located to hit the highest

asked by afika on May 9, 2016
50. ## Physics

A straight horizontal rope is towing a 5.52 kg toboggan across frictionless ice. A 2.76 kg radio is on top of the toboggan with a coefficient of static friction of 1.50 between the toboggan and radio. In order to prevent the radio from slipping, what is

asked by Jim on October 13, 2016
51. ## physics

The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.60 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point

asked by Cassandra on February 28, 2012
52. ## Physics

A football quarterback shows off his skill by throwing a pass 45.90 m downfield and into a bucket. The quarterback consistently launches the ball at 40.00 ∘ above horizontal, and the bucket is placed at the same level from which the ball is thrown. What

asked by Lily on October 22, 2016
53. ## Math

The cable supporting a ski lift rises 2 feet for each 5 feet of horizontal length. The top of the cable is fastened 1320 feet above the cable’s lowest point. Find the lengths b and c, and find the measure of the angle theta.

asked by Anonymous on January 9, 2014
54. ## physics

The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 7.0 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point

asked by jyothi on February 16, 2015
55. ## Physics

As an object slides across a rough horizontal surface, what happens to the object's gravitional potential energy with respect to the surface and speed? Would't potential energy decrease at rest?

asked by Priscilla on January 7, 2010
56. ## physics

A submarine dives from the water surface at an angle of 31° below the horizontal, following a straight path 75 m long. How far is the submarine then below the water surface? A)75 m B)(75 m)/sin 31° C)(75 m)sin 31° D)(75 m)cos 31° E)none of these

asked by fawaz on February 10, 2014
57. ## physics

A crate of mass m = 230 kg is pushed at constant speed up the frictionless ramp (θ = 29.0°) by a horizontal force F. What is the magnitude of F? What is the magnitude of the force exerted by the ramp on the crate?

asked by jim on October 20, 2010
58. ## Physics

A ball rolls without slipping at 6 m/s off an incline of 25 degrees. The ball falls off the incline and enters a hole 3 meters below the incline. What is the horizontal distance between the bottom of the incline and the hole?

asked by Michael on January 30, 2018
59. ## physics

a sailor pulls a boat along a dock by a rope held at an angle of 55.5 with the horizontal. How much work is done if the sailor exerts a force of 345 N on the rope and pulls the boat 23.8 m?

asked by tammy on December 1, 2011

Sally will clear and set tabs in the Tabs dialog box. Desi will set and clear tabs on the Horizontal Ruler. Who is correctly setting and clearing tabs?

asked by nina on April 4, 2014
61. ## physics

The velocity v(t) of a particle is plotted as a function of time. The scale on the horizontal axis is 9 s per grid square and on the vertical axis 2 m/s per grid square. Initially, the particle is at x0 = 43 m.

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

A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 38.8 m/s. At the same time, it has a horizontal velocity of 54.3 m/s.At what speed does the vehicle move along its descent path

asked by Erin on October 23, 2012
63. ## Calculus

Susan pulls on a rope sleigh with a force of 120 N. If the rope makes an angle of 25 degrees with the horizontal, what is the force that tends to lift the sleigh? a)120.00 N b)108.76 N c)50.71 N d)84.85 N how would you know?

asked by Sara on April 28, 2015
64. ## phys

A short 10-g string is used to pull a 50-g toy across a frictionless horizontal surface. If a 3.0 x 10^(–2)-N force is applied horizontally to the free end, the force of the string on the toy, at the other end, is: A) 0.15 N B) 6.0 x 10^(–3) N C) 2.5 x

asked by tony on March 8, 2014
65. ## physics

A hammer is being used to pull a nail out of a horizontal board. L = 32 cm and d = 5.2 cm. If a force of 158 N is exerted horizontally as shown, calculate the force (in N) exerted by the hammer claws on the nail.

asked by sydwell on May 8, 2014
66. ## Physics

A ball thrown by a boy in the street is caught 5 s later by another boy on the balcony of the house 10 m away and 3 m above the street level. What is the initial speed of the ball? What is the angle above the horizontal at which it was thrown?

67. ## physics

a boy stands on a cliff overlooking a lake below. He throws a rock at an initial velocity of 8.0m/s,at an angle 25 degrees above the horizontal. The lake's surface is 4.5 m lower than the point the rock was released. Find the speed of the rock just before

asked by bec on November 7, 2011
68. ## Physics

While a roofer is working on a roof that slants at 37.0 ∘ above the horizontal, he accidentally nudges his 86.0 N toolbox, causing it to start sliding downward, starting from rest. If it starts 5.00 m from the lower edge of the roof, how fast will the

asked by Brittany on November 24, 2017
69. ## physics for life sciences

A car is driven at 80km/h on a horizontal road. If the car is now driven up 10m high rise, what speed would it have at the top of the rise? ( Assume thet the wheels of the car roll at all times so thatit dosen't experience sliding friction ; exclude any

asked by Lillian on June 2, 2010
70. ## Physics

A student presses a book between his hands. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 31N. The coefficient of static friction between his hands and the book is 0.40.

asked by Anonymous on June 11, 2012
71. ## Physics

In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.87 m by the horizontal 25 N force from the broom and then has

asked by D on February 20, 2011
72. ## phsyics

A place kicker must kick a football from a point 35 m (about 38 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 24 m/s at an angle of 48 ◦ to the horizontal. By how

asked by asdfghjk on September 20, 2012
73. ## Physics (HEELPPP)

A coin with a diameter of 1.90 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 14.4 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude

asked by Ryan on June 27, 2014
74. ## Physics

A 21.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder of aluminum 6.00 cm in diameter. A strong wind bends the pole much as a horizontal force of 940 N exerted at the top would. How far to the side does the top of the pole

asked by Young on October 30, 2017
75. ## physics

A 1500kg car moving at a speed of 20 m/s comes to a halt. How much work was done by the brakes? How fast can a 2.0 horsepower motor lift a 200 kg mass? A boy with a mass of 20 kg is riding on a 10 kg cart which is travelling at 3 m/s. He jumps off in such

asked by G on July 3, 2015
76. ## Physics

To win the game, a place kicker must kick a football from a point 40 m (43.744 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23 m/s at an angle of 30.9 ◦ from the

asked by Sarah on October 19, 2013
77. ## college physics

In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.88 m by the horizontal 25 N force from the broom and then has

asked by Help! on February 18, 2010
78. ## Physics

A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 32 N. The coefficient of static friction between his

asked by kelly on February 15, 2010
79. ## physics,

A student presses a book between his hands The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 30.8 N. The coefficient of static friction between his hands and the book is

asked by darren on November 28, 2011
80. ## physics

A 120 N child is in a swing that is attached to ropes 2.20 m long. Find the gravitational potential energy of the child-Earth system relative to the child's lowest position at the following times. (a) when the ropes are horizontal (b) when the ropes make a

asked by Katie on October 18, 2010
81. ## physics help?

A coin with a diameter of 3.30 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 16.1 rad/s and rolls in a straight line without slipping. If the rotation slows with an angular acceleration of magnitude

asked by ruby on November 28, 2010
82. ## physics

A balling ball of mass 70.2 kilogram is attached to the ceiling by a 4.20 meter rope. The ball is pulled to to one side and set to horizontal circular motion with a speed of 3.6 meters per second. The angle between the rope and the vertical axis is 30

asked by Anonymous on October 6, 2014
83. ## physics

a cube slides down a frictionless incline as shown and inelastically strikes a cube at the battom of the incline that's 1/2 (one-half) it's mass. The coeff. of restitution between the two masses is 0.7. If incline is 30 cm high and table is 90cm off floor,

asked by Emily on April 26, 2016
84. ## Physics

Bert is standing on a ladder picking apples in his father's orchard. As he pulls each apple off the tree, he tosses it into a basket that sits on the ground 2.2 m below at a horizontal distance of 1.3 m from Bert. How fast must Bert throw the apples

asked by Robert on January 22, 2013
85. ## Phyics

A cylinder which is in a horizontal position contains an unknown noble gas at 4.63 × 104 Pa and is sealed with a massless piston. The piston is slowly, isobarically moved inward 0.202 m, while 1.95 × 104 J of heat is removed from the gas. If the piston

asked by Erin on August 22, 2015
86. ## physics

Bert is standing on a ladder picking apples in his father's orchard. As he pulls each apple off the tree, he tosses it into a basket that sits on the ground 2.5 m below at a horizontal distance of 1.9 m from Bert. How fast must Bert throw the apples

asked by Kayla on February 4, 2013
87. ## science

a horizontal beam 6.8m long of mass 15kg is supported by pillars of 0.2 of each end. There is a man of mass 85 kg standing 1.7kg from one end of the beam .draw a diagram showing the forces acting on the beam in this equilibrium condition .calculate the

asked by ben on November 14, 2015
88. ## physics

A lighthouse that rises 46.0 ft above the surface of the water sits on a rocky cliff that extends 19 ft out into the ocean from the base of the lighthouse. A sailor on the forward deck of a ship sights the top of the lighthouse at an angle of 25.0 degrees

asked by rob on September 9, 2012
89. ## physics

A bob of mass = 0.250 is suspended from a fixed point with a massless string of length = 23.0 . You will investigate the motion in which the string traces a conical surface with half-angle = 25.0. What tangential speed must the bob have so that it moves in

asked by bryan on October 3, 2010
90. ## Physics

a cube slides down a frictionless incline as shown and inelastically strikes a cube at the battom of the incline that's 1/2 (one-half) it's mass. The coeff. of restitution between the two masses is 0.7. If incline is 30 cm high and table is 90cm off floor,

asked by Emily on April 27, 2016
91. ## Physics

A uniform disk of radius 0.45 m is mounted on a frictionless, horizontal axis. A light cord wrapped around the disk supports a 1 kg object, as shown. When released from rest the object falls with a downward acceleration of 4.5 m/s^2. What is the moment of

asked by Nate on February 16, 2016
92. ## physics

In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.77 m by the horizontal 25 N force from the broom and then has

asked by Sam on July 14, 2010
93. ## Physics

The target is to be dropped from the point A at t = 0, the same moment as the gun is ﬁred. The bullet hits the target at a point P. Let the initial speed of the bullet be v0 = 106 m/s, let the angle between the vector v0 and the horizontal (x) direction

asked by Jimmy on September 30, 2011
94. ## physics

A projectile is fired horizontally from a gun that is 45m above flat ground, emerging from the gun with speed 250m/s How long does the projectile remain in the air? At what horizontal distance from the firing point does it strike the ground?.What is the

asked by Shanice on October 10, 2011
95. ## Physics

The left end of a 1-kg, 1.0 m long uniform thin rod is attached to a pivot, about which it can rotate freely. A force F is applied at the right end of the rod at 30 degree angle to hold the rod stationary in a horizontal position. What is the magnitude of

asked by gina on April 21, 2013
96. ## physics

While a roofer is working on a roof that slants at 43.0 above the horizontal, he accidentally nudges his 88.0 toolbox, causing it to start sliding downward, starting from rest.If it starts 5.00 from the lower edge of the roof, how fast will the toolbox be

asked by Anonymous on May 2, 2013
97. ## Physics

Suppose a straight 1.25 mm diameter copper wire could just "float" horizontally in air because of the force of the Earth's magnetic field B, which is horizontal, perpendicular to the wire, and of magnitude 5.00 multiplied by 10-5 T. What current would the

asked by Justin on February 10, 2011
98. ## physics

In Figure P4.30, m1 = 10.5 kg and m2 = 4.5 kg. The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30. Figure P4.30

asked by nat on February 21, 2010
99. ## quick algebra question

When asked what quadrant the coordinate (0,0) is in, should I put None or Origin as my answer? It is by definition the origin. It is not in any of the four quadrants. I would put "origin." Orgin would get my vote too. I think in anlaytic geometry the plane

asked by Anonymous on September 4, 2006
100. ## math

) An object is moving on a straight line which is 15 centimeters away from the center of a circle of radius 28 centimeters. (Both the circle and the straight line are on the same plane.) A source of light is located on the line drawn from the center of the

asked by price on April 23, 2016