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April 16, 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: 58,421

Physics
A 3.4 kg block is pushed along a horizontal floor by a force of magnitude 21 N at a downward angle θ = 40°. The coefficient of kinetic friction between the block and the floor is 0.26. What the magnitude of the block's acceleration?
Sunday, October 23, 2011 at 9:06pm by Tom

phy
A constant force does 12.0 Joules of work pushing a 350 gram block a distance of 2.5 meters up a ramp. The block starts from rest and reaches a speed of 4.75 m/s after being pushed for 2.5 m. The block’s potential energy increases by 5.0 J as it travels this distance. (a) What...
Saturday, June 9, 2012 at 4:14pm by ihsan

physics
because of friction, a constant force of 20 N is needed to slide a box across a room to the right at a constant speed, and box is moved 3 m. What is the friction force and how much work is done by friction force?? How much work is done by gravity? How much work is done by ...
Sunday, October 1, 2006 at 1:14am by mitch

physics
A 16.0 g bullet is fired horizontally into a 87 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 168 N/m. The bullet becomes embedded in the block. The bullet block system compresses the spring by a ...
Sunday, October 21, 2012 at 10:17pm by Anonymous

physics
A 16.0 g bullet is fired horizontally into a 87 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 168 N/m. The bullet becomes embedded in the block. The bullet block system compresses the spring by a ...
Monday, October 22, 2012 at 9:00am by Anonymous

physical aspects of nature
A 1,440-N crate is being pushed across a level floor at a constant speed by a force of 250 N at an angle of 20.0° below the horizontal; (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 250-N force is instead pulling the block at an ...
Thursday, March 15, 2012 at 9:33am by greg

physical science
A 0.50 kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 8.0 N for a distance of 7.5 m. What is the velocity of the block in m/s?
Saturday, October 13, 2012 at 4:55pm by Anonymous

physics
If a 0.50-kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 5.7 N for a distance of 8.6 m, then what would be the block's velocity?
Sunday, March 3, 2013 at 12:14am by fatimah

physics
A 15.7 kg block is at rest on a ramp, whose angle is 12.1 degrees from the horizontal. How much Normal Force is acting on the block?
Friday, March 14, 2014 at 11:25am by Anonymous

Science
If the ice cubes are at the bottom, then the liquid must be less dense than ice. Alcohol? I disagree somewhat with the second premese. Logic applies to ethical questions. Observation applies to ethical questions. What cannot be determined by "scientific" methods is what is ...
Tuesday, September 18, 2012 at 8:00pm by bobpursley

Science
How much work is done lifting a 100 N block of ice up to a shelf 3m off the ground? What if you use a ramp? How heavy is the block of ice in pounds?
Saturday, September 8, 2012 at 6:58pm by Nicole

Physics
we must apply a force of magnitude 82.0 N to hold the block stationary at x=-2.0 cm. From that position, we then slowly move the block so that our force does +8.0 J of work on the spring–block system; the block is then again stationary. What are the block's positions, in cm...
Wednesday, November 4, 2009 at 3:46pm by Shawna

physical science
during a football game two players try to tackle another player.one player applies a force of 50.0 n to the east. a second player applies a force of 120.0 n to the north . what is the total applied force?and what is themagnitude and direction of the force
Tuesday, October 11, 2011 at 11:08am by sarah arcand

Physics help needed
In the figure below, block 1 of mass m1 = 3.0 kg and block 2 of mass m2 = 1.0 kg are connected by a string of negligible mass. Block 2 is pushed by force F of magnitude 30 N and angle θ = 20°. The coefficient of kinetic friction between each block and the horizontal ...
Friday, October 26, 2012 at 3:04am by The master

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 ...
Wednesday, May 30, 2007 at 7:44pm by charlie

college physics
Two blocks of masses m1 = 4.00 kg and m2 = 3.00 kg are placed in contact with each other on a frictionless horizontal surface. A constant force F = 9.00 N is applied to the block of mass m1. a) Determine the magnitude of the acceleration of the two-block system. b) Determine ...
Saturday, February 11, 2012 at 12:56pm by lacrosse

physics
A 1.3- block of ice is initially at a temperature of -3.5. If 6.6×105 of heat are added to the ice, what is the final temperature of the system? Find the amount of ice, if any, that remains. Suppose the amount of heat added to the ice block is doubled. By what factor must the ...
Monday, November 22, 2010 at 5:20pm by katelyn

physics
A block slides down a rough plane. The plane makes an angle of 60 degrees with the horizontal, the weight of the block is 5.0N and the coefficient of kinetic (dynamic) friction between the block and the plane is 0.30. 1) determine the magnitude of the frictional force acting ...
Wednesday, October 4, 2006 at 8:02pm by blacksheep

Physics
An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates with amplitude A on a frictionless, horizontal surface. The maximum speed of the block is V_m. The force constant of the spring is a)Mg/A b)MgV_m/2A c...
Sunday, March 25, 2007 at 2:17pm by Tammy

physics
A 2.5 wood block is pulled along a wood floor at a steady speed. A second wood block, with mass 3.5 , is attached to the first by a horizontal string. what is the magnitude of the force pulling on the first block
Tuesday, October 18, 2011 at 3:01pm by Hello

Physics
horizontal friction vertical gravity down, force up from ice equal and opposite initial Ke = (1/2) m v^2 = .5*4 m = 2 m Jloules final Ke = 0 normal force at ice = 9.81 * m so friction force = .12 (9.81) m work done = Force * distance = .12 * 9.81* m * d = change in ke = 2 m so...
Sunday, December 9, 2012 at 10:01pm by Damon

maths
A block of mass 20kg resting on a horizontal force 50N.If the coefficient of friction between the table and the block is 0.45,calculate the acceleration with which it moves
Sunday, November 27, 2011 at 2:17am by Kingsley

physics
Years ago, a block of ice with a mass of about 22kg was used daily in a home icebox. The temperature of the ice was 0.0 degrees Celsius when delivered. As it melted, how much heat did a block of ice that size absorb? The latent heat of fusion of water is 3.34 x 10 ^ 5 J/kg. ...
Saturday, November 20, 2010 at 10:06am by Norah

Physics
The question is: "A block of ice at 0oC is dropped from a height that causes it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the ice. Show that the height necessary for this to occur is at least 34 km." I know...
Wednesday, September 23, 2009 at 4:07pm by Ceres

physics
A block of mass M connected to an untstretched horizontal spring of spring constant k is hit by a bullet of mass m which has a velocity V just before the collision. The bullet stays in the block. The coefficient of friction between the block and surface is b. Explain how do ...
Thursday, April 21, 2011 at 3:39pm by Peter

Mechanics M1
Q.1 Find the force needed to accelerate a 2 kg block at 3m/s^2 up a rough plane (coefficient of friction 0.2) inclined at 25 degree to the horizontal if the force is a) Parallel to the slope b) horizontal c) at 45 degree to the upward verticle
Sunday, April 29, 2012 at 5:58am by Jat

Physics
A 12.0 g bullet is fired horizontally into a 108 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring of constant 144 N/m. The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum...
Friday, December 10, 2010 at 2:23pm by Loucy

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 ...
Tuesday, May 31, 2011 at 8:09pm 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 ...
Wednesday, September 21, 2011 at 11:16pm 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 ...
Friday, October 5, 2012 at 7:48pm 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 ...
Tuesday, February 26, 2013 at 3:56pm 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 ...
Monday, July 8, 2013 at 1:26pm by johhnny

Physics- Elena please help!
A 20.0 g bullet is fired horizontally into a 85 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 156 N/m. The bullet becomes embedded in the block. The bullet block system compresses the spring by a ...
Thursday, October 18, 2012 at 5:01pm by Megan

physics
A rectangular block of ice 10 m on each side and 1.1 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. a) How high does the top of the ice block float above the water level? m * .116 OK HELP: Use Archimedes' Priciple. b) ...
Sunday, November 7, 2010 at 10:57pm by Sarah

physics
a 2.00 kg block is attached to a spring of force constant 500 N/m. The block is pulled 5.00 cm to the right of equilibrium and released from rest. Find the speed of the block as it passes through equilibrium if a) the horizontal surface is frictionless and b) the coefficient ...
Wednesday, March 7, 2007 at 8:49pm by Jean

physics
A 5 g bullet is fired into a 2 kg wooden block attached to a spring with a force constant of 20 N/m. It lodges in the block, and the block and bullet compress the spring until they come to a rest. If the bullet was moving at 1000 m/s just before the collision, how far is the ...
Wednesday, July 18, 2012 at 2:36am by shawn

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 ...
Sunday, December 5, 2010 at 3:36pm by Anonymous

Physics PLEASE HELP
A 50-kg crate is pulled across the ice with a rope. A force of 100 N is applied at an angle of 38° with the horizontal. Neglecting friction, calculate the acceleration of the crate AND the upward force the ice exerts on the crate as it is pulled.
Tuesday, November 1, 2011 at 9:20pm by Eddie

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 done on the block by...
Monday, October 5, 2009 at 9:35pm by Mario

college physics
find the frictional force exerted on a 20kg block pulled slowly over a horizontal floor using a rope which makes a 30 degree angle over the horizontal. the pulling force is 100N??? i found the Fn to be 146 N what do i do from there?
Thursday, June 10, 2010 at 2:14pm by josh

Physics
A block is sitting on a ramp. The block feels a force of friction sufficient to keep it from sliding down the ramp, which makes an angle of 30 degrees w.r.t. horizontal. What is the minimum coefficient of static friction between the block & ramp?
Monday, February 21, 2011 at 3:48pm by Paige

physics
A horizontal spring with a spring constant of 22 N/m has a 600 gram block attached to it and is at rest on a frictionless surface. A second block which has a mass of 220 grams is pushed toward the 600 gram block at a speed of 1.50 m/s. The second block collides with and sticks...
Saturday, December 10, 2011 at 3:01pm by Anonymous

physics
A horizontal spring with a spring constant of 22 N/m has a 600 gram block attached to it and is at rest on a frictionless surface. A second block which has a mass of 220 grams is pushed toward the 600 gram block at a speed of 1.50 m/s. The second block collides with and sticks...
Saturday, December 10, 2011 at 5:13pm by Anonymous

Physics - Torque
Consider a rectangular block of mass 30kg, height= 3m, length = 2m. A force F is applied horizontally at the upper edge. The acceleration of gravity is 9.8 m/s^2. 1)What is the minimum force required to start to TIP the block? 2)What is the minimum coefficient of static ...
Sunday, April 22, 2007 at 5:34pm by Belle

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 of m = 2.00kg is ...
Monday, March 12, 2007 at 4:53pm by Matt

Physics
A small bug is nestled between a 1-kg block and a 2-kg block on a frictionless table. A horizontal force can be applied to either of the blocks as shown in figure Q5.24 (i) In which situation illustrated in the figure (a) or (b), does the bug have a better chance of survival, ...
Tuesday, September 18, 2012 at 5:31pm by Avery

Physics
a block , mass .10 kg, slides from rest without friction down an inclined plane 2m long which makes an angle of 20 degrees with the horizontal.(a) WWhat force accelerates the block down the plane?(b)j What is the velocity of the block when it reaches the botton of the pplane...
Sunday, January 30, 2011 at 9:34pm by james

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...
Friday, July 26, 2013 at 1:24pm by Charles

Science
Hopefully, some of the following links will help: http://search.yahoo.com/search?fr=mcafee&p=equation+for+acceleration+of+the+block+whenblock+of+ice+of+mass+M+is+pulled+horizontally+with+a+steady+force+P+against+a+force+of+friction+F+I Sra
Wednesday, February 9, 2011 at 6:19pm by SraJMcGin

phy
(Q1)A 40N force applied at an angle of 37c above the horizontal pulls a 5kg box on a horizontal floor. The acceleration of the box is 3m/s2,How large a frctional force must be retarding the motion of the box. (a)50 N(b)13N(c)17N(d)25N (Q2) A block of mass 2kg is connected to a...
Saturday, July 6, 2013 at 2:05am by ikye

physics
The mass of the heavier block is 28 kg and the mass of the lighter blocks is 14 kg and the magnitude of the force of the connecting string on the smaller block is 24 N. Assume: g = 9.8 m/s^2 and the horizontal surface on which the objects slide is frictionless. Determine the ...
Friday, September 28, 2012 at 9:19pm by michelle

statics
A 10kg block rest on top of a 50kg block. A force of 120n is being pushed on the 10kg block at an angle of 45 deg. What is the magnitude of frictional force between the blocks? The cofficient is force is .4
Sunday, December 9, 2012 at 10:35am by james

physics
a force of 5 N is required to slide a block at constant speed over the dry surface of a table. The block has a mass of 2.5 kg. The coefficient of friction is..
Monday, January 30, 2012 at 7:08pm by Mariana

Physics
When you talk about a moving situation, the kinetic friction coefficient applies. The friction force is down the plane when trying to pull the block up the plane, so 70.7 sin 23.5 + 70.7 cos 23.5 * 0.12 = F (For constant velocity, the forces balance) Solve for F
Saturday, December 8, 2007 at 9:24am by drwls

Physics
A 55-kg block, starting from rest, is pushed a distance of 5.0 m across a floor by a horizontal force Fp whose magnitude is 140 N. Fp is parallel to the displacement of the block. The final speed of the block is 2.35 m/s. A) What work did the friction do on the box? B) What is...
Monday, February 13, 2012 at 11:04pm by Amy

Physics
A block weighing 6.8 N requires a force of 2.5 N to push it along at constant velocity. What is the coefficient of friction for the surface? A weight W is now placed on the block and 4.6 N is needed to push them both at constant velocity. What is the weight W of
Saturday, January 8, 2011 at 11:29pm by Christine

physics
In the system shown in the figure, suppose the block has a mass of 3.3 , the spring has a force constant of 490 , and the coefficient of kinetic friction between the block and the floor is 0.13. Find the work done on the block by the spring and by friction as the block is ...
Thursday, December 8, 2011 at 6:36pm by Patrick Jarvis

physics
A 5.00 g bullet moving with an initial speed of 340 m/s is fired into and passes through a 1.00 kg block. The block, initially at rest on a frictionless, horizontal surface, is connected to a spring of force constant 860 N/m. (a) If the block moves 5.50 cm to the right after ...
Monday, March 23, 2009 at 10:19pm by Jennifer

physics
A block M1 of mass 16.5 kg sits on top of a larger block M2 of mass 26.5 kg which sits on a flat surface. The kinetic friction coefficient between the upper and lower block is 0.425. The kinetic friction coefficient between the lower block and the flat surface is 0.125. A ...
Saturday, February 22, 2014 at 11:03am by Mimi

physics
calculate the acceleration if you push with a 20n horizontal force on a 3 kg block on a horizontal friction-free air table
Sunday, October 2, 2011 at 8:30pm by Anonymous

Physics 20
Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?
Wednesday, April 6, 2011 at 8:22pm by peter

Physics 20
Dymamics unit A car standing still is struck by 2 other cars simultaneously. a beetle applies a force of 2350N [N60degreesE] and a truck applies a force of 4150N [SW]. What is the net force acting on the stationary car?
Wednesday, April 6, 2011 at 9:55pm by peter

physics
A block sits against a vertical wall and a 120 lb force P acts diagonally to the left on the block at an angle below the horizontal. Determine the magnitude and direction of the friction force which the vertical wall exerts on the 100 lb block if theta is (a)15 degrees (b)30 ...
Sunday, September 13, 2009 at 5:47pm by Jessi

Science
A 110.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 35.0 deg with the horizontal. Find the magnitude of the applied force F.
Wednesday, October 26, 2011 at 1:37am by Mark

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 ...
Tuesday, December 8, 2009 at 10:40pm by Melissa

physics
A 40g chunk of 90 degree C iron is dropped into a cavity in a very large block of ice at 0 degree C.Find what mass of ice will melt. (The specific heat capacity of iron is 0.11 cal/g degree C)
Tuesday, April 3, 2012 at 9:33pm by christy

physics
There is a block on top of an incline plane. The incline is going down to the right. The angle to the right of the 90 is 36.9 degree. There is a force pushing on it from the left. Find the applied force (F) needed to prevent the block from sliding down the incline; ignore ...
Sunday, June 26, 2011 at 11:18am by k9

phsyics
upward force on box: P*sin30=P/1 horizontal force: P cos30 at constant speed, pulling force=friction force Pcos30=mu(mg-P/2) solve for P
Sunday, November 25, 2012 at 6:14pm by bobpursley

Physics
A small block of mass m rests on the sloping side of a triangular block of mass M which itself rests on a horizontal table. Assuming all surfaces are frictionless, determine the magnitude of the force ->F that must be applied to M so that m remains in a fixed position ...
Wednesday, September 23, 2009 at 3:43pm by Physics

physics
You push a 2.0 kg block against a horizontal spring, compressing the spring by 15 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 75 cm from where you released it. The spring constant is 200 N/m. What is the block-table coefficient ...
Sunday, November 7, 2010 at 8:59pm by Meghan

physics
You push a 1.9 kg block against a horizontal spring, compressing the spring by 13 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the block-table coefficient ...
Monday, February 14, 2011 at 11:44pm by Jacob

Physics
You push a 2.5 kg block against a horizontal spring, compressing the spring by 16 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the block-table coefficient ...
Sunday, February 19, 2012 at 5:14pm by Chris

physics. please help!
A 2.5 kg block is pulled to the right by a horizontal string. The coefficient of static friction between the block and the floor is 0.30 and the coefficient of kinetic friction is 0.20. What value of force applied by the string will start the block moving?
Sunday, October 31, 2010 at 7:44pm by caroline

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 9.4 cm. The spring constant is 1000 N/m. What is the initial velocity of the bullet?
Monday, June 29, 2009 at 8:13pm by Sarah

Physics
A block is being pulled up a ramp. Assume that the frictional force acting on the block on the ramp is 25.0N. What is the x-component of the force of gravity on the block on the ramp? What is the acceleration of the block?
Tuesday, January 10, 2012 at 9:18pm by Pepesina

physics
A heat transfer of 8.7 multiplied by 105 J is required to convert a block of ice at -12°C to water at 12°C. What was the mass of the block of ice?
Saturday, November 22, 2008 at 11:05pm by lyd

PLEASE HELP ME IN THIS PHYSICS PROBLEM
A heat transfer of 9.5 x 10^5 J is required to convert a block of ice at -15°C to water at 15°C. What is the mass of the block of ice?
Monday, January 14, 2013 at 7:05pm by JOHN

AMHS'Mechanics
The spring shown in figure is unstreched when a man starts pulling on the cord.The mass of the block is M.If the man exerts a constant force F.Find:-1.The amplitude and time period of the motion of thae block,2.The energy stored in the spring when the block passes through the ...
Saturday, February 25, 2012 at 3:15am by Deep

Science
A fixed, single pulley that is used to lift a block does which one of the following? A. doubles the force required to lift the block B. decreases the force required to lift the block C. makes the block easier to lift by changing the direction of the force needed to lift it D. ...
Wednesday, April 10, 2013 at 10:15pm by Cassie

Physics
A spring that has a force constant of 1100 N/m is mounted vertically on the ground. A block of mass 1.90 kg is dropped from rest from height of 1.65 m above the free end of the spring. By what distance does the spring compress?
Tuesday, November 2, 2010 at 9:10pm by Pranav

Physics
A 149 kg crate is pushed at constant speed up a frictionless inclined plane of theta = 51 with the horizontal. Assuming one pushes with a horizontal force, what is the magnitude of the force F (in N) required to do this?
Monday, October 14, 2013 at 2:32pm by JAYZ

physics
You push a 4.6 kg block against a horizontal spring, compressing the spring by 27 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 63 cm from where you released it. The spring constant is 250 N/m. What is the coefficient of kinetic ...
Wednesday, November 2, 2011 at 12:20am by Keelia

physics
You push a 1.3 kg block against a horizontal spring, compressing the spring by 22 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 79 cm from where you released it. The spring constant is 220 N/m. What is the coefficient of kinetic ...
Sunday, April 7, 2013 at 5:39pm by Samira

physics
An unknown force pushes a 17 kilogram block across a smooth (frictionless) floor. Three seconds after the force is first applied to the block, the block is moving with a speed of 6 meters per second. What is the magnitude of the unknown force?
Tuesday, January 3, 2012 at 11:46am by Anonymous

physics
An unknown force pushes a 17 kilogram block across a smooth (frictionless) floor. Three seconds after the force is first applied to the block, the block is moving with a speed of 6 meters per second. What is the magnitude of the unknown force?
Tuesday, July 24, 2012 at 7:10pm by Anonymous

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
Monday, March 24, 2014 at 6:52pm by Anonymous

Re: Physics/Math
A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the right.) Calculate the...
Saturday, February 10, 2007 at 10:14pm by COFFEE

Physics
A 45 kg trunk is pushed 7.8 m at constant speed up a 30° incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is 0.23. a)Calculate the work done by the applied horizontal force. b)Calculate the work done by the weight of...
Friday, October 23, 2009 at 3:41pm by Rachel

physics
A block weighing 11.05 N rests on a 28 degree incline. (a) Find the normal force exerted by the plane on the block out of the plane (b) Find the frictional force exerted by the plane on the block up the slope. c) Find the magnitude of the total force exerted by the plane on ...
Wednesday, October 31, 2012 at 9:57pm by anthony

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
Wednesday, February 26, 2014 at 8:09am by gie

PHYSICAL SCIENCE
A 0.50-KG BLOCK INITIANALLY ON A REST ON A FRICTIONLESS HORIZONTAL SURFACE IS ACTED UPON BY A FORCE OF 8.0N FOR A DISTANCE OF 4.0M. HOW MUCH KINETIC ENERGY DOES THE BLOCK GAIN?
Tuesday, September 7, 2010 at 10:53pm by LESLIE

physics
an aluminium of mass 2.1 kg rests on a steel platform. A horizontal force of 15N is applied to block(a) given the coefficient of limiting friction is 0.61 will the block move? (b)if it moves what will be its acceleration?
Tuesday, January 21, 2014 at 5:46pm by Maryam

College Physics
A 26.5 kg block (m1) is on a horizontal surface, connected to a 6.90 kg block (m2) by a massless string. The frictionless pulley has a radius R = 0.096 m and a moment of inertia I=0.080 kgm2 m2 is hanging straight down from the pulley over the edge of the surface. A force F = ...
Monday, March 5, 2012 at 12:19am by Anonymous

Physics
a 4 kg block is being pulled by a string at a constant speed on a surface with coeficient of kinetic friction of .3. If the string is at an angle 45 degrees above the horizontal, what is the magnitude of the force F(also known as the string)?
Saturday, December 15, 2012 at 7:21pm by Corey

Physics
a 4 kg block is being pulled by a string at a constant speed on a surface with coeficient of kinetic friction of .3. If the string is at an angle 45 degrees above the horizontal, what is the magnitude of the force F(also known as the string)?
Saturday, December 15, 2012 at 7:24pm by Corey

Physics
a 4 kg block is being pulled by a string at a constant speed on a surface with coeficient of kinetic friction of .3. If the string is at an angle 45 degrees above the horizontal, what is the magnitude of the force F(also known as the string)?
Saturday, December 15, 2012 at 7:28pm by Corey

Physics
A 45kg sled is coasting with constant velocity at 3.0m/s over a patch of smooth and level ice. It enters a very rough section of ice that is 11m long in which the force of friction is 15N. With what speed will the sled emerge from the rough ice?
Thursday, January 5, 2012 at 9:15pm by Lala

Physics
A block of mass 12 kg starts from rest and slides a distance of 8 m down an inclined plane making an angle of 40◦ with the horizontal. The coefficient of sliding friction between block and plane is 0.4. The acceleration of gravity is 9.8 m/s^2 What is the net force ...
Monday, January 28, 2013 at 6:47pm by Murry

Physics
A light string, connects blocks 1 and 2 of masses m1 and m2. These blocks are further connected to a block of mass M by another light string that passes over a pulley of negligible mass and friction. Blocks 1 and 2 move with a constant velocity v down the inclined plane, which...
Thursday, December 9, 2010 at 10:07pm by Rahul

physics
An unknown force pushes a 17 kilogram block across a smooth frictionless floor. Three seconds after the force is first applied to the block , the block is moving with a speed of 6 meters per second. What is the magnitude of the the unknown force in Newtons?
Friday, November 25, 2011 at 5:11pm by Susie

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