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August 22, 2014

Search: A dockworker applies a constant horizontal force of 90.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5 m in a time 5.10 s. stops pushing

Number of results: 36,710

General Physics
A 35 kg block is pulled at a constant speed along a horizontal surface by a rope with tension FT . The rope is inclined at an angle from the horizontal as shown. The block moves a distance 15 m along the horizontal surface. What is the net work done by all the forces acting on...
July 26, 2013 by Charles

physics
A 500g block is released from rest and slides down a frictionless track that begins 2m above the horizontal. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring with a spring constant of 20.0N/m. Find the maximum distance...
August 10, 2011 by AJ

physics
One of two 207.0 kg crates is dragged across the floor at a constant speed with a horizontal force of 197.0 N. How much force would it take to drag them both across the floor if they are tied together one behind the other? How much force would it take to drag them both across ...
December 4, 2010 by sky

physics
One of two 207.0 kg crates is dragged across the floor at a constant speed with a horizontal force of 197.0 N. How much force would it take to drag them both across the floor if they are tied together one behind the other? How much force would it take to drag them both across ...
December 4, 2010 by helena

Physics
A 149 kg crate is pushed at constant speed up a frictionless inclined plane of $\theta$ = 51 $^{\circ}$ with the horizontal. Assuming one pushes with a horizontal force, what is the magnitude of the force F (in N) required to do this?
October 14, 2013 by JAYZ

physics
A block weighing 71.5 N rests on a plane inclined at 24.1 to the horizontal. The coefficient of the static and kinetic frictions are 0.26 and 0.13 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the block from slipping? B)...
February 22, 2014 by James

college physics
you find that it takes a horizontal force of 160 newtons to slide a box along the surface of a level floor at constant speed . the coefficient of static friction is 0.52, and the coefficient of kinetic friction is 0.47. if you place the box on a dolly of mass 5.3 kg and with ...
August 14, 2010 by oslec

College Physics
A wheel of radius 0.398 m is mounted on a frictionless horizontal axis. The rotational inertia of the wheel about the axis is 0.0576 kgm2. A massless cord wrapped around the wheel is attached to a 0.790 kg block that slides on a horizontal frictionless surface. If a ...
July 6, 2012 by Stephanie

Physics
A block of mass m is being dragged across the floor by a force F. The coefficient of friction between the block and floor is u. Show that if the block is being accelerated by the force F from rest for a time t, the speed of the block at time t can be found from: Vf= (F/m - ug)t
November 10, 2011 by Courtney

Physics(Please, please check)
A uniform horizontal beam is attached to a vertical wall by a frictionless hinge and supported from below at an angle = 38o by a brace that is attached to a pin. The beam has a weight of 347 N. Three additional forces keep the beam in equilibrium. The brace applies a force ...
June 10, 2012 by Hannah

Physics
A hockey puck slides along the ice. There is a frictional force between the ice and puck, and this is the only horizontal force on the puck. Which of the following must be true? A. The puck will slow down and eventually come to rest. B. The puck will continue to move at ...
December 8, 2011 by Anonymous

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 rest. (a) What is the...
June 8, 2014 by twill

physical science
A horizontal force of 10 Newtons acts on a 2 kg block on a level surface.The frictional force between the block and the surface is 3 Newtons.What is the magnitude and the direction of the net force acting on the block?
March 9, 2014 by neo

PHYSICS
A factory worker pushes a 30.7 crate a distance of 4.0 along a level floor at constant velocity by pushing downward at an angle of 31 below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. What magnitude of force must the worker apply to...
October 11, 2012 by HANNE

12th Physics
A 55 kg ice skater is at rest on a flat skating rink. A 198 N horizontal forceis needed to set the skater in motion.However, after the skater is inmotion, a horizontal force of 175 N keeps the skater moving at a constantvelocity. Find the coefficients of static and kinetic ...
December 8, 2009 by Melissa

Physics
Cn u xplain the solutions steps by steps? Cz i really dnt understand wen i revise it nw. Tnxs u kindly. Two particles A & B are connected by a light inextensible string passing over a smooth pulley P. Particle A, of mass m, lies on a plane inclined at 30degree to the ...
September 29, 2008 by Spirit

physics
using the strap at an angle of 31 above the horizontal, a Grade 12 Physics student, tired from studying, is dragging his 15 kg school bag across the floor at a constant velocity. (a) If the force of tension in the strap is 51 N, what is the normal force on the bag? image (b) ...
March 5, 2010 by sylvia

Physics
A 3.0 kg block is being pulled with a horizontal force of 29.7 N. If the block is accelerating at 3.2 m/s/s, what is the coefficient of kinetic friction between the block and the table?
November 2, 2010 by keith

physics
A 2 kg block is pushed 2 m along a fixed horizontal surface by a horizontal force of 20 N. The coefficient of kinetic friction of the surface is k= 0.40. (a) How much work is done by the 20 N force? (b) what is the work done by the friction force? (c) What is the total work ...
November 3, 2011 by pakilina

Physics
A 1.10 kg} block of wood sits at the edge of a table, 0.790 m above the floor. A 1.1010−2 kg} bullet moving horizontally with a speed of 725 m/s embeds itself within the block. What horizontal distance does the block cover before hitting the ground?
August 3, 2010 by Todd

physics
A 1.20- block of wood sits at the edge of a table, 0.720 above the floor. A 1.2010−2- bullet moving horizontally with a speed of 750 embeds itself within the block. What horizontal distance does the block cover before hitting the ground?
October 26, 2011 by chris

ph
A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 300 N/m, as shown in the figure below. The spring is unstretched when the ...
November 14, 2011 by carlton

physics
A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 300 N/m, as shown in the figure below. The spring is unstretched when the ...
November 14, 2011 by carlton

physics
A 17 N horizontal force F pushes a block weighing 3.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.65, and the coefficient of kinetic friction is 0.45. Assume that the block is not moving initially. (a) Will the block move? ...
July 14, 2010 by Sam

physics
A 12 N horizontal force pushes a block weighing 5.0 N against a vertical wall (Fig. 6-26).The coefficient of static friction between the wall and the block is 0.60, and the coefficient of kinetic friction is 0.40. Assume that the block is not moving initially. (a) Will the ...
January 5, 2014 by Hamed

Physics Help!
A 2.2 kg mass is attached to a spring with a force constant of 560 N/m on a smooth horizontal surface. The mass is pulled to one side, released, and allowed to oscillate back and forth. (a) find the maximum compression and expansion of the spring if the maximum speed of the ...
January 26, 2011 by Erica L

Physics
A force of 50 N accelerates a 5.0 kg block at 6.0 m/s2 along a horizontal surface. (a) What is the frictional force acting on the block? (b) What is the coefficient of friction?
October 21, 2012 by HanuPhysics

physics.pls help
An ice hut used for winter fishing is at rest on a level patch of snow. The mass of the hut is 80kg. A wind exerts a horizontal force of 205N on the hut, and causes it to accelerate. While in motion, the magnitude of the force of friction acting on the hut is 196N. What is the...
November 17, 2011 by ted

Physics
A 3.0 kg block being pulled across a table by a horizontal force of 80 N also experiences a frictional force of 5 N. What is the acceleration of the block?
July 14, 2010 by Adriana

physics
1. A basketball player passes the ball to his teammate at an angle of 40degrees above the horizontal. The ball is released 1.5m above the floor at a speed of 5m/s. Find: a) the maximum height reached by the ball from the floor b) the horizontal required to reach the maximum ...
December 7, 2011 by bella

Physics
A 500 g block is released from rest and slides down a frictionless track that begins h = 1.70 m above the horizontal, as shown in Figure P13.56. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring with a spring constant ...
December 5, 2010 by Anonymous

Physics
Three blocks rest on a frictionless, horizontal table, with m1 = 9 kg and m3 = 16 kg. A horizontal force F = 104 N is applied to block 1, and the acceleration of all three blocks is found to be 3.3 m/s2. 1) Find m2 2)What is the normal force between 2 and 3?
September 1, 2011 by Logan

MIT
A 2kg block on a flat horizontal surface is pulled with a force of 15 N directed 10 degrees above the horizontal. It is found to accelerate at 2m/s^2. Find the coefficient of kinetic friction at the interface?
July 9, 2012 by Joe Parterner

phsyics
an 8g bullet is shot into a 4kg block at rest on a frictionless horizontal surface. the bullet remains lodged in the block. the block movies into a spring and compresses it by 3cm. the force constant of the spring is 1500N/m. the initial speed of the bullet is closest to?
November 6, 2008 by joyce

Physics
A man drags a table 4.25 m across the floor, exerting a constant force of 54.0 N, directed 28.0 above the horizontal. I have found the work done by the applied force to be 202.6 J but I can't find the second part of the question which is below. (b) How much work is done by ...
October 4, 2011 by Cindy

physics
you drag a heavy box along a rough horizontal floor by a horizontal rope. Identify the reaction force to each of the following forces: (a) the pull of the rope on a box (b) friction force oin the box (c) the normal force on the box (d) weight of the box
October 6, 2009 by sam

physics
you drag a heavy box along a rough horizontal floor by a horizontal rope. Identify the reaction force to each of the following forces: (a) the pull of the rope on a box (b) friction force oin the box (c) the normal force on the box (d) weight of the box
October 7, 2009 by Sara

physics
A force of 70.0 N is exerted at an angle of 30.0 below the horizontal on a block of mass 8.00 kg that is resting on a table. What is the magnitude of the normal force acting on the block?
October 9, 2009 by keisha

Science
A force of 70.0 N is exerted at an angle of 30.0 below the horizontal on a block of mass 8.00 kg that is resting on a table. What is the magnitude of the normal force acting on the block?
February 16, 2010 by Dan Sanchez

Physics
A block of mass M=1.0 kg is dragged over a horizontal surface by a force F=20.0N. The block is displaced a distance d=10.0 m, the friction force Ff is 5.0 N. What is the work done by the weight Fg?
September 13, 2011 by Elisabeth

physics
A block of mass M=1.0 kg is dragged over a horizontal surface by a force F=20.0N. The block is displaced a distance d=10.0 m, the friction force Ff is 5.0 N. What is the work done by the weight Fg?
September 15, 2011 by Elisabeth

Physics
How much work is done by the horizontal force F = 150 N on the 18 Kg block when the force pushes the block 5.0 M up along the 32 degree friction-less incline?
March 31, 2013 by Anon3

Physics
How much work is done by the horizontal force F = 150 N on the 18 Kg block when the force pushes the block 5.0 M up along the 32 degree friction-less incline?
April 1, 2013 by Anyi

physics
Madison pushes with a 160-N horizontal force on a 20-kg crate of coffee resting on a warehouse floor.the floor of friction force of 24N.show that the box accelerates is 4m/s
April 1, 2014 by Tracelle

Physics
A worker pushing a 35.0-kg wooden crate at a constant speed for 13.7 m along a wood floor does 390 J of work applying a constant horizontal force of magnitude F0 on the crate.Determine the value for F0.
November 21, 2011 by raj

physics
A 5 000-N weight is held suspended in equilibrium by two cables. Cable 1 applies a horizontal force to the right of the object and has a tension, T1. Cable 2 applies a force upward and to the left at an angle of 37.0 to the negative x axis and has a tension, T2. What is the ...
September 18, 2011 by Susan

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 block is most nearly 9 ...
May 25, 2012 by Ashley

Help! Physics!!
A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 400 N. For the first 17 m the floor is frictionless, and for the next 17 m the coefficient of friction is 0.34. What is the final speed of the crate? Express your answer using two ...
October 7, 2010 by Melissa

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.
October 3, 2011 by Kayla

physics
A 2.5 kg block of ice at a temperature of 0.0 degrees Celcius and an initial speed of 5.7 m/s slides across a level floor. If 3.3 x 10^5 J are required to melt 1.0 kg of ice, how much ice melts, assuming that the initial kinetic energy of the ice block is entirely converted to...
February 15, 2010 by mike

Physics
Two blocks, each with a mass = 0.168 kg, can slide without friction on a horizontal surface. Initially, block 1 is in motion with a speed = 1.28 m/s; block 2 is at rest. When block 1 collides with block 2, a spring bumper on block 1 is compressed. Maximum compression of the ...
March 5, 2012 by Lilly

physics
Two blocks, each with a mass m = 0.400 kg, can slide without friction on a horizontal surface. Initially, block 1 is in motion with a speed $v$ = 1.20 m/s; block 2 is at rest. When block 1 collides with block 2, a spring bumper on block 1 is compressed. Maximum compression of ...
March 5, 2014 by Ted

physics
A 1,440-N crate is being pushed across a level floor at a constant speed by a force of 210 N at an angle of 20.0 below the horizontal, as shown in the figure (a) below (a) What is the coefficient of kinetic friction between the crate and the floor
September 28, 2011 by Sam

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
February 26, 2014 by gie

physics
A person pushes a 10.5-kg shopping cart at a constant velocity for a distance of 25.7 m on a flat horizontal surface. She pushes in a direction 30.9 below the horizontal. A 35.3-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that ...
May 31, 2011 by cswidener

Physics
A person pushes a 23.4-kg shopping cart at a constant velocity for a distance of 31.1 m on a flat horizontal surface. She pushes in a direction 34.8 below the horizontal. A 38.5-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that ...
September 21, 2011 by Hannah

Physics
A person pushes a 19.5-kg shopping cart at a constant velocity for a distance of 35.6 m on a flat horizontal surface. She pushes in a direction 25.4 below the horizontal. A 53.1-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that ...
October 5, 2012 by Anonymous

Physics
A person pushes a 23.5-kg shopping cart at a constant velocity for a distance of 30.3 m on a flat horizontal surface. She pushes in a direction 31.5 below the horizontal. A 37.3-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that ...
February 26, 2013 by Randy

physics
A person pushes a 24.7-kg shopping cart at a constant velocity for a distance of 34.0 m on a flat horizontal surface. She pushes in a direction 23.2 below the horizontal. A 48.5-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that ...
July 8, 2013 by johhnny

Science
A body of mass 17.25kg rest on a smooth horizontal table. The coefficient of friction between the body and the table is 0.34. What is the horizontal frictional force that will make the body just slide.
August 17, 2013 by Charity

Physics
A block slides from rest with negligible friction down a track, descending 5.0m to point P at the bottom. It then slides on the horizontal surface. The coefficient of friction between the block and the horizontal surface is 0.20. How far does the block slide on the horizontal ...
December 29, 2012 by Anonymous

phsyics
A box have a mass of 50 Kilograms is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must be exerted on the rope...
November 25, 2012 by Anonymous

Physics
Three blocks on a frictionless horizontal surface are in contact with each other, as shown below. A force F is applied to block A (mass mA). (a) Draw a free-body diagram for each block. Determine (b) the acceleration of the system (in terms of mA, mB, mC), (c) the net force on...
October 22, 2010 by Anonymous

physics
Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.18 kg, the heavier box has a mass of 7.51 kg. (a) Find the contact force between these boxes when a horizontal force of 3.9 N is applied to the light box.
September 26, 2011 by jeff

Physics
A box weighting 200N is pushed on a horizontal floor. What acceleration will result if a horizontal force of 100N is applied to the box.? coefficient of friction is 0.4
May 27, 2013 by silent_klr

physics
suppose the you push with a 40-N horizontal force on a 4-kg mass resting on a horizontal surface against a horizontal friction force of 24N. show that the acceleration is 4 m/s2
January 31, 2012 by Anonymous

physics
A 4 kg block is pushed by an external force against a spring with spring constant 137 N/m until the spring is compressed by 2.1 m from its uncompressed length (x = 0). The block rests on a horizontal plane that has a coefficient of kinetic friction of 0.58 but is NOT attached ...
February 27, 2014 by uriel

physics
At the airport, you pull a 18 kg suitcase across the floor with a strap that is at an angle of 41 above the horizontal. Find the normal force and the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic friction between ...
October 18, 2011 by Jessica

physics
A block of mass 2 kg is propelled by a spring with spring constant k=5200N/m onto a smooth (frictionless) track. The spring is initially compressed a distance of 0.13 m from its equilibrium configuration. At the end of the track there is a rough inclined plane at an angle of ...
October 28, 2010 by Nicole

Physics
Two steel blocks are at rest on a frictionless horizontal surface. Block X has a mas of 3.0 kg ans is attacthed by means of a light taut string to block Y that has a mass of 12 kg. A force of 45 N (E) is applied to block x. Calculate the force block Y exerts on block x. I don'...
April 17, 2009 by Lena

physics
A 20-N horizontal force pushes an object along a rough floor so that the object moves with a constant velocity of 7.0 m/s. How much power does this force deliver to the object?
August 29, 2012 by Alexandra

physics
Two toboggans are pulled across the ice with a force of 1.2 x 102 N. The rope of the toboggan makes an angle of 55o with the horizontal. The first toboggan has a mass of 25 kg, and the second toboggan has a mass of 16 kg. Assume that the ice surface is smooth enough to be ...
April 25, 2012 by myra

Physics Classical Mechanics
A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 4.0 m. The mass of the ladder is m1= 15.0 kg, uniformly distributed. The ladder is initially inclined at an angle θ= 40.0∘ with respect to the horizontal. Assume that ...
December 12, 2013 by Robert

physics
An 8 g bullet is shot into a 4.0 kg block, at rest on a frictionless horizontal surface. The bullet remains lodged in the block. The block moves into a spring and compresses it by 3.7 cm. The force constant of the spring is 2500 N/m. In the figure, the initial velocity of the ...
March 31, 2014 by Georgey

Physics
A cart initially at rest on a horizontal floor requires a 365N horizontal force to set it in motion. We know that the coefficient of static friction is 0.64. What is the mass of the cart?
November 9, 2010 by Taylor

Physics
1)How much work is done by a person lifting a 2 kg object from the bottom of a well at a constant speed of 2m/s for 5 s. Is the answer mgh=2*9.8*10m 2)A 2kg block slides on a rough horizontal surface. A force (magnitude = 4N) acting parallel to the surface is applied to the ...
April 5, 2011 by Fiona

science
1a)A block of mass=100kg is tied to a donkey that moves with constant acceleration of 20cm/s^2 up a 30 degree incline. What is the force with which the donkey pulls on the block parallel to the incline? the coefficient of kinetic friction between the incline and the block is 0...
May 5, 2010 by Anonymous

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
April 20, 2012 by ali

physics
A block of mass m = 14 kg is pressed with a horizontal force F against a frictionless ramp of angle θ = 78∘. What is the magnitude of the normal force exerted by the incline surface on the block?
October 1, 2013 by ss01

Physics
A 6.00 kg crate is pushed by a 300.0 N force at and angle of 30 degrees with the horizontal. a.What coefficient of friction value is experienced by the crate if it moves at constant velocity? b. What coefficient of friction value is present if the crate accelerates at 1.50m/s2...
September 12, 2006 by fluffy

Physics
A 115.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 46.0 deg with the horizontal.what is the magnitude of the normal force between the ramp and the box? The applied force= 1167.04N
March 24, 2014 by Anonymous

physics
A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman applies a horizontal force with magnitude 44.0 N to the box and produces an acceleration of magnitude 2.80 m/s^{2}, what is the mass of the box?
February 2, 2011 by mely

physics
A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman applies a horizontal force with magnitude 44.0 N to the box and produces an acceleration of magnitude 2.80 m/s^{2}, what is the mass of the box?
February 2, 2011 by andrea

physics
Mass mA rests on a smooth horizontal surface, mB hangs vertically.If m_{\rm{A}}=13.0 kg and m_{\rm{B}}=3.0 kg in the figure , determine the magnitude of the acceleration of each block.
October 23, 2010 by Anonymous

physics
When a horizontal force of 7N acts on a block on a resistance free surface, it produces an acceleration of 3.5m/s^2. suppose a second 4kg block is dropped onto the first. what is the magnitude of the acceleration of the combination if the same force continues to act? Assume ...
December 7, 2009 by Christine

physics
When a horizontal force of 4.5 newtons acts on a block on a resistance-free surface, it produces an acceleration of 2.5 m/s squared. Suppose a second 4.0 kg block is dropped onto the first. What is the magnitude of the acceleration of the combination if the same force ...
October 25, 2010 by Caitlyn

Physics
A block of mass m = 2.00 kg is attached to a spring of force constant k = 5.15 102 N/m that lies on a horizontal frictionless surface as shown in the figure below. The block is pulled to a position xi = 5.75 cm to the right of equilibrium and released from rest. (a) Find the ...
December 6, 2012 by Ame

Physics
A block of mass m = 2.00 kg is attached to a spring of force constant k = 5.15 102 N/m that lies on a horizontal frictionless surface as shown in the figure below. The block is pulled to a position xi = 5.75 cm to the right of equilibrium and released from rest. (a) Find the ...
December 6, 2012 by Ame

Physics
A block of mass m is placed in a smooth-bored spring gun at the bottom of the incline so that it compresses the spring by an amount x_c. The spring has spring constant k. The incline makes an angle theta with the horizontal and the coefficient of kinetic friction between the ...
March 13, 2011 by Trevor

Physics
A horizontal force presses the block of mass 10kg to the wall. What is the minimum magnitude of the applied force which can hold the block on the wall without accelerating it down if the coefficient of static friction (pico per second) between the block and the wall is 0.40.
July 10, 2011 by Myyke

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 between blocks 2 and 3?
January 25, 2011 by Lauren

physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 75 N the acceleration of the box is 0.55 m/s2; when you increase the force to 85 N the acceleration is 0.78 m/s2. (a) Find the mass of the box. kg (b) Find the ...
February 13, 2010 by janie

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 72 N the acceleration of the box is 0.43 m/s2; when you increase the force to 77 N the acceleration is 0.58 m/s2. (a) Find the mass of the box. (b) Find the ...
February 15, 2010 by Bobby C

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 78 N the acceleration of the box is 0.46 m/s2; when you increase the force to 86 N the acceleration is 0.76 m/s2. (a) Find the mass of the box. (b) Find the ...
February 12, 2012 by Anna

physics
A stewardess pulls her 70 N flight bag a distance of 200 m along an airport floor at constant speed. The force she exerts is 40 N at an angle of 50 degrees above the horizontal. Find (a) the work she does, (b) the work done by the force of friction, and (c) the coefficient of ...
October 22, 2007 by Anonymous

physics
an engine block of mass 275kg rest on a plane which is inclined at 13 degrees to the horizontal.if the plane can be tilted to a maximum angle of 21 degrees before the engine block slide due to its weight.calculate the minimum force parallel to the plane required to move the ...
October 6, 2010 by charles

physics
A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. What is the magnitude of the frictional force that acts on the block
September 21, 2011 by kelly

Physics
A crate with a mass of 40 kg is being dragged along a horizontal floor at a constant velocity by an applied force of 180 N. What is the coefficient of kinetic friction? (g = 10 m/s2
November 9, 2012 by Joshua

science ( physics)
hello, i am having trouble with this problem. Calculate the average force of friction acting on a wood block as it is propelled along the floor by an elastic band ? my solution and my ideas: What does it mean by average froce of friction? I first weighed the peice of wood to ...
May 30, 2007 by charlie

physics
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 195-kg laser sensor which measures the thickness of the ice (see the drawing). The helicopter and the sensor move only in the horizontal direction and have a horizontal acceleration of ...
November 25, 2012 by John

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