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March 6, 2015

Search: A 41.0 crate, starting from rest, is pulled across a floor with a constant horizontal force of 240 . For the first 12.0 the floor is frictionless, and for the next 12.0 the coefficient of friction is 0.17.

Number of results: 64,759

Physics
A horizontal force of 150 N is used to push a 43.5 kg packing crate a distance of 5.30 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150 N force (b) the coefficient of kinetic friction between the ...
November 8, 2011 by Raqual

Physics
A horizontal force of 150 N is used to push a 43.5 kg packing crate a distance of 5.30 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150 N force (b) the coefficient of kinetic friction between the ...
November 8, 2011 by Raqual

Physics
A horizontal force of 150 N is used to push a 32.5-kg packing crate a distance of 4.95 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force? (b) the coefficient of kinetic friction between the ...
May 3, 2013 by Abdul A.

Physics
A horizontal force of 150 N is used to push a 32.5-kg packing crate a distance of 4.95 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force? (b) the coefficient of kinetic friction between the ...
May 7, 2013 by Abdalla A.

physics
A horizontal force of 150 N is used to push a 45.0-kg packing crate a distance of 5.75 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force (b) the coefficient of kinetic friction between the ...
February 17, 2015 by Sierra

physics
To push a 16 kg crate up a frictionless incline, angled at 32 to the horizontal, a worker exerts a force of 108.0 N, parallel to the incline. As the crate slides 1.50 m, how much work is done on the crate by the worker's applied force?
October 24, 2014 by Abby

physics
You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 199 kg, and you need to exert a force of 343 N to make it just begin to move. (a) What is the coefficient of static friction between the floor and the refrigerator? F=(mu)m*g 343\...
September 9, 2010 by bill

physics
A 75kg box is being pulled across the floor with a force of 465N.If the kinetic coefficient of friction is 0.57,what is the acceleration of the box?
December 10, 2011 by Auriel

physics
A 75kg box is being pulled across the floor with a force of 465N.If the kinetic coefficient of friction is 0.57,what is the acceleration of the box?
December 10, 2011 by Auriel

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...
February 10, 2007 by COFFEE

physics
Find the work done when a 20 kg sled is pulled across level ground by a rope that makes a 50 deg angle with the horizontal. The sled moves 40 m and the rope is pulled with 10 N of force. If the work done by friction is 240 J, what will happen to the Kinetic Energy of the sled?
April 11, 2013 by sped

Physics I for College
a rope that makes an angle of 30 degrees with the horizontal drags a crate along the floor. what must be the tension in the rope if a horizontal force of 40N is needed to drag the crate? please help me. i really didn't understand what my professor told me. he speak so fast. ...
June 23, 2014 by Ian

Physics
A construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. The beam is 2.77 m long and weighs 472 N. At a certain instant the worker holds the beam momentarily at rest with one end a distance d = 1.44 m above the floor, as shown in...
December 29, 2010 by Sarah

physics
I'm just having trouble setting up this problem. It's based on a picture so I'll describe it: There is an open ladder standing on the floor with a person on the third step on one side. There is a crossbar attached to the two sides of the ladder and the floor is frictionless. I...
December 1, 2010 by Meghan

physics
You need 500 Netwons of force to start the crate to slide on a wooden floor. What is the weight of the crate if the coefficent drag of friction is 0.80?
July 5, 2012 by Andrew Moore

physics
You pull a short refrigerator with a constant force across a greased (frictionless) floor, either with horizontal (case 1) or with tilted upward at an angle 38 (case 2). (a) What is the ratio of the refrigerator's speed in case 2 to its speed in case 1 if you pull for a ...
March 5, 2011 by karim

physics : friction
a man pushes a packing case which has a total mass of 50 kg across a floor at a constant speed of 0.4 m s-1 by exerting a horizontal force of 100 N. (a) what was the resultant force on the case? > F = ma F = 50 * 0 F =0 (b) what was the frictional force acting on the case...
August 31, 2014 by Anonymous

Calculus
An electric elevator cable with a motor at the top has a multistrand cable weighing 4.5lb/ft. When the car is at the first floor, 180ft of cable are pulled out, and effectively 0ft are out when the car is at the top floor. How much work does the motor do just lifting the cable...
May 2, 2014 by Mason

(pls help) physics
(Q1) A 50kg boy suspends himself from a point on a rope tied horizontally between 2 vertical poles. the 2 secments of the rope are then inclined at angles 30degrees and 60degrees respectively to the horizontal. The tension in the sefments of the rope is (a)25.0 and 43.3(b)50.0...
July 9, 2013 by ikye

Physics
A delivery person pulls a 35 kg box across the floor. The applied force exerted on the box is 122.5 N [38o above the horizontal]. The force of kinetic friction on the box has a magnitude of 55.0 N. The box starts from rest. Using the Work-energy theorem, determine the speed of...
November 12, 2011 by holly

College Physics Help
A thin rod (length = 1.10 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from rest, tips over and ...
March 5, 2012 by Angela

Physics
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 is 3.4 kg and m2 is 9.1 kg, and block 2 is initially at rest 130 cm above the floor, how long does it take block 2 to reach the floor?
September 23, 2009 by Megan

physics
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 = 3.8 kg and m2 = 9.2 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor?
September 23, 2012 by Becky

physics
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 = 3.8 kg and m2 = 9.2 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor?
September 23, 2012 by Becky

Physics
An atwood machine consists of a massless string connecting two masses over a massless, frictionless pully. In this case, the masses are 1.70kg and 1.65kg. The system is released from rest with the 1.7kg mass 2.15m above the floor and the 1.65kg mass on the floor. (a) what is ...
October 4, 2010 by Larry

physics
A 3.5 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 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.)
November 18, 2010 by maya

Physics
A block of wood is pulled by a horizontal string across a horizontal surface at a constant velotcity with a force of 20 N. What is the coefficient of kinetic friction between the surfaces?
October 13, 2010 by Kelsey

physics 3
Static and Kinetic Friction: A 10 kg crate is at rest on a horizontal table (s =0.8, k =0.4). Then various amounts of horizontal pushing force are applied to it. a.) The largest pushing force that can be applied before the crate starts moving is of size: N b.)-d.) If the ...
September 23, 2008 by kelsey

Physics
A uniform beam AB of mass 65.3kg rests against the smooth vertical wall at A, and the rough horizontal floor at B, at an angle 45deg. The coefficient of static friction between the beam and the horizontal floor is =0.242. Calculate the magnitude of the horizontal force P, in ...
March 6, 2012 by Anonymous

physics
You push a 8.00 kg suitcase across a smooth horizontal floor applying a force directed 31.5 degrees below the horizontal. Someone measures the acceleration of the suitcase to be 1.73 m/s2. Assuming g = 10.0 m/s2, what is the normal force the ground exerts on the suitcase?
September 25, 2012 by layla

physics
a block with a velocity 4m/s slides 8m across a rough horizontal floor before coming to rest.the coefficient of friction is.
January 27, 2014 by kelly

Physics
Can you plz give explaination to the solutions steps by steps in brief? Cz i really dont understand how 2 apply the formula when i revise it nw. Thnkz a lot. [g=10 ms^-2] Particles P, of mass 0.3 kg & Q, of mass 0.2 kg are attached to the ends of a light inextensible string. ...
September 29, 2008 by WarmLing

Physics
Which of the following forces does NOT have a zero work done on the object. Choices The normal force on a box that slides across a horizontal level floor. The weight on a box that slides across a horizontal level floor. The normal force on a box that slides down an inclined ...
November 11, 2010 by rose

physics....need help!
An 80 kg man is riding in an elevator from the first floor to the 34th floor. The elevator and man are moving at a constant speed. What is the net force on the man in Newtons.
March 25, 2013 by i need help from anyone!

physics
Consider the system shown in the figure below with m1 = 30.0 kg, m2 = 13.7 kg, R = 0.110 m, and the mass of the pulley M = 5.00 kg. Object m2 is resting on the floor, and object m1 is 4.60 m above the floor when it is released from rest. The pulley axis is frictionless. The ...
May 14, 2011 by mimi

Physical science
A create is pulled across a horizontal surface with a force of 100N which makes an angle of 30 degrees with a horizontal.(a)draw a diagram of the horizontal and vertical components of the force.(b)resolve the force in its parallel and perpendicularcomponents of the force.
January 31, 2013 by Nomagcina

physics
a flight attendant pulls her 75 N flight bag a distance of 325 m along a level airport floor at a constant velocity. the force she exerts is 39 N at an angle of 57 degrees above the horizontal. calculate the coefficient of kinetic friction between the flight bag and the floor.
November 28, 2010 by Alex

Physics
An 80 kg man is riding in an elevator from the first floor to the 34th floor. The elevator and man are moving at a constant speed. What is the net force on the man in Newtons (g=9.8)
March 27, 2013 by John

PHYSICS!!!!
An 80 kg man is riding in an elevator from the first floor to the 34th floor. The elevator and man are moving at a constant speed. What is the net force on the man in Newtons.
March 28, 2013 by please help me out!!

Physics
Three identical blocks, fastened together by a string, are pulled across a frictionless surface by a constant force. Compare the tension on string A to magnitude of applied force F.
August 5, 2010 by Shaila

physics
1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
July 7, 2010 by Ricky

physics
1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
July 7, 2010 by Ricky

physics
A man pushes a packing case of total mass 40kg across a floor at a constant speed of 0.5m/s by exerting a horizontal force of 100N what is the resultant force on the case how big was the force of friction acting on the case how much work was done in 3s what is the Ek into what...
April 11, 2013 by gngraqn

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
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?
October 7, 2010 by jim

physics 3!! **
A man lifts a 3 kg crate from the floor to a shelf (2 m high) at constant speed*. What was the change in KE of the crate? What is the change in the PE of the crate? If it takes 2 s for the man to lift the crate to the shelf, find the man's power output.
October 6, 2008 by kelsey

Physics
A horizontal force of 150 N is used to push a 33.0 kg packing crate a distance of 6.65 m on a rough horizontal surface. If the crate moves at constant speed and the work done is 997.5 joules. What is the coefficient of kinetic between the crate and the surface.
February 18, 2010 by Nate

college physics
A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.860 m/s encounters a rough horizontal surface of length = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.355 and he exerts a constant horizontal force ...
November 21, 2011 by ann

physics
a block of mass 2 kg and block B of mass 8 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force 4 N with both blocks experiencing equal constant ...
June 9, 2008 by shelly

phy
force in the x-direction with magnitude Fx=18N-(0.530N/m)x is applied to a 5.50 box that is sitting on the horizontal, frictionless surface of a frozen lake. is the only horizontal force on the box. what is the speed after 12m. starting from rest and x=0
October 9, 2012 by lvf

PHYSICS
A 5.00-kg box slides 7.00 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floor and the box if the box had an initial speed of 3.00 m/s?
March 18, 2014 by Maria

jordan
a horizontal force of 12n is used to pu;; a 24kg block at constant veocity on a horizontal floor. what is the cofficient of friction ?
December 2, 2013 by yasmin

physics
A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
March 21, 2014 by santoki

physics
A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
March 23, 2014 by santoki

physics
A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
March 23, 2014 by santoki

physics
A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it and the concrete is 0....
March 24, 2014 by santoki

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
In the figure, a 4.3 kg block is accelerated from rest by a compressed spring of spring constant 660 N/m. The block leaves the spring at the spring's relaxed length and then travels over a horizontal floor with a coefficient of kinetic friction μk = 0.260. The frictional ...
November 15, 2014 by brian

science
A 100 kg crate is pushed at constant speed up the frictionless 30 degree ramp by a horizontal force vector F. What are the magnitudes of a) vector F and b) the force on the crate from the ramp? I am not sure how to find part a. What would I need to do to find it? for part b ...
November 12, 2006 by Chris

physics
A horizontal force of 142 N is used to push a 47.0 kg packing crate a distance of 6.00 m on a rough horizontal surface. The acceleration of gravity is 9.81 m/s2 . If the crate moves with constant velocity, calculate a) the work done by the force. Answer in units of J b) the ...
October 12, 2011 by #!

physics
A horizontal force of 142 N is used to push a 47.0 kg packing crate a distance of 6.00 m on a rough horizontal surface. The acceleration of gravity is 9.81 m/s2 . If the crate moves with constant velocity, calculate a) the work done by the force. Answer in units of J b) the ...
October 12, 2011 by #!

physics
A crate pushed along the floor with velocity \vec{v} _{i} slides a distance d after the pushing force is removed.If the mass of the crate is doubled but the initial velocity is not changed, what distance does the crate slide before stopping?
October 22, 2012 by nhan

Physics
A cable pulls a crate of mass 19.0 kg across the floor in 6.8s. If the total distance traveled is 5.40 m, find the power used by the cable. (19)*(9.8)*(5.4)/(6.8) ) 147.9 W Raul pushes a stalled car with a force of 204 N. If the required force decreases at a constant rate from...
May 14, 2009 by Damian

physics
A 14.8 kg box is being dragged 12.5 m across the floor using a rope held at a 32 degree angle from the floor. the force being used is 146 N. Determine the work that has been done.
December 7, 2012 by April

physics
A 50-kg block is pushed a distance of 5.0 m across a floor by a horizontal force Fp whose magnitude is 150 N. Fp is parallel to the displacement of the block. The coefficient of kinetic friction is 0.25. A) What is the total work done on the block? B) If the box started from ...
February 13, 2012 by Amy

physics
A rubber ball (mass 0.21 kg) is dropped from a height of 1.7 m onto the floor. Just after bouncing from the floor, the ball has a speed of 3.6 m/s. (a) What is the magnitude and direction of the impulse imparted by the floor to the ball? Magnitude? Direction? (b) If the ...
December 4, 2011 by glenmore

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 the force applied to ...
March 18, 2009 by Physics

physics
a 650 newton crate rests on the floor. how much work is required to move it at a constant speed, 3 meters against a friction force of 150 Newtons
March 22, 2011 by melanie

physics
A flight attendent pulls her 78.6 N flight bag a distance of 344 m along a level airport floor at a constant velocity. The force she exerts is 44.8 N at an angle of 64.2 degrees above the horizontal. Find the coefficient of kinetic friction between the flight bag and the floor...
March 1, 2009 by Bob

Physics
A rope is used o pull a metal box 15.0m across the floor. The rope is held at an angle of 46.0 degrees with the floor and a force of 628N is used. How much work does the force of the rope do?
January 26, 2010 by jess

Math
You are given the job of laying carpet for a six-story building. At each floor the dimensions of the floor are 75 meters in length by 40 meters in width. A stairwell takes up a space 2.5 m by 1.5 m, and cuts through each floor. If the rest of the floor area is to be carpeted, ...
June 26, 2013 by sarah

Physics/Math
A cold package of hot dogs slides rightward across a frictionless floor through a distance d = 20.5 cm while three forces are applied to it. Two of the forces are horizontal and have the magnitudes F1 = 5.00 N and F2 = 1.00 N; the third force is angled down by = 65.0 and has ...
March 1, 2007 by Technoboi11

physics!!
A flight attendant pulls her 70.0 N flight bag a distance of 263 m along a level airport floor at a constant speed. The force she exerts is 41.0 N at an angle of 52.0 above the horizontal. (b) Find the work done by the force of friction on the flight bag. (c) Find the ...
April 15, 2010 by brittany

Physics
A 22.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 78.0 N and is directed at an angle of 30.0 above the horizontal. Determine the coefficient of kinetic friction.
September 27, 2012 by Anonymous

Physics
A 24.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 77.0 N and is directed at an angle of 30.0 above the horizontal. Determine the coefficient of kinetic friction.
September 26, 2013 by Donna

Science
A 7-kg brick is dragged across the floor by a horizontal force of 42 N. If a frictional force of 18 N also acts on the brick, what is its acceleration?
May 3, 2011 by Anna

Physics
Three part problem cant figure out the second and third parts (part 1 of 3) A cart loaded with bricks has a total mass of 12.9 kg and is pulled at constant speed by a rope. The rope is inclined at 20.6 ◦ above the horizontal and the cart moves 25.8 m on a horizontal ...
November 15, 2008 by Johnathon

physics
A 4.3kg object moves across a floor with a velocity of + 8.2 m/s and slides to rest in 5.8 s. The net force producing this acceleration is:
January 28, 2015 by robbi

Physics
A golf ball released from a height of 1.80 m above a concrete floor, bounces back to a height of 1.06 m. If the ball is in contact with the floor for 4.62 ms, what is the magnitude of the average acceleration a of the ball while it is in contact with the floor? Quidditch told ...
October 4, 2007 by Lindsay

physics
A crate is pulled up a rough incline. The pulling force is parallel to the incline. The crate is pulled a distance of 6 . 92 m. The acceleration of gravity is 9 . 8 m / s 2. What is the magnitude of the work is done by the gravitational force? Answer in units of J
January 14, 2015 by allan

physics, only smart people answer
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 = 3.4 kg and m2 = 9.0 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor?
February 12, 2013 by tsubasa

physics
A crate of oranges weighing 164 N rests on a flatbed truck 2.0 m from the back of the truck. The coefficients of friction between the crate and the bed are μs = 0.30 and μk = 0.20. The truck drives on a straight, level highway at a constant 7.6 m/s a) What is the ...
February 17, 2011 by melad

physics
How much power must you exert to horizontally drag a 21.0kg table 15.0m across a brick floor in 20.0s at constant velocity, assuming the coefficient of kinetic friction between the table and floor is 0.500?
October 24, 2013 by HELP

physics
How much power must you exert to horizontally drag a 21.0kg table 15.0m across a brick floor in 20.0s at constant velocity, assuming the coefficient of kinetic friction between the table and floor is 0.500?
October 24, 2013 by becca

physics
At the end of the semester, you are loading your gear into a van to go home. In loading the van, you can either lift a 45.0-kg crate straight up(method 1) or push it up a 3.00-m-long ramp that is inclined at an angle above the horizontal (method 2).In both methods, the crate ...
December 9, 2007 by ajo

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
The figure shows a 7 kg block being pulled along a frictionless floor by a cord that applies a force of constant magnitude 20 N but with an angle θ(t) that varies with time. When angle θ = 29, at what rate is the block's acceleration changing if (a)θ(t) = (3 ...
January 21, 2014 by John

Physics II Honors
A 23.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 79.0 N and is directed at an angle of 30.0 above the horizontal. Determine the coefficient of kinetic friction.
November 10, 2010 by Anonymous

physics
1) a force of 10 N acts on a 5.0 kg object, initially at rest, for 2.5 s. What is the final speed of the object? 2) a 1500 kh car, is allowed to coast along a level track at a speed of 8.0 m/s. It collides and couples with a 2000-kg truck , initially at rest with brakes ...
November 29, 2010 by Joceylin

PHYSICS : )
A flight attendant pulls her 69.1 N flight bag a distance of 280 m along a level airport floor at a constant velocity. The force she exerts is 32.7 N at an angle of 50.2◦ above the horizontal. Find the work done by the force of friction on the flight bag. Answer in units...
October 18, 2008 by Jay

Physics
4. A force of 48 N is required to start a 7.8 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? = (b) Does the coefficent of friction have a unit? A. No, it is a ratio B. No, the units are not real C...
February 23, 2014 by Rian

Physics
A crate of potatoes of mass 23.0 kg is on a ramp with angle of incline 30 to the horizontal. The coefficients of friction are μs = 0.78 and μk = 0.35. Find the frictional force (magnitude and direction) on the crate if the crate is at rest. I don't understand why I ...
September 23, 2012 by Alyssa

physics
A force of 30.0 N is required to start a 3.8 kg box moving across a horizontal concrete floor If the 30.0 N force continues, the box accelerates at 0.50 m/s2. What is the coefficient of kinetic friction?
November 10, 2009 by miya

physics
A force of 36.1 N is required to start a 4.0 -kg box moving across a horizontal concrete floor. If the 36.1 N force continues, the box accelerates at 0.71 m/s^2. What is the coefficient of kinetic friction?
October 1, 2010 by Kim

Physics need help thnk you
A crate of oranges weighing 209 N rests on a flatbed truck 2.0 m from the back of the truck. The coefficients of friction between the crate and the bed are μs = 0.41 and μk = 0.20. The truck drives on a straight, level highway at a constant 7.5 m/s. (a) What is the ...
February 16, 2012 by Anonymous

Wow is there no one to help with physics???
A crate of oranges weighing 209 N rests on a flatbed truck 2.0 m from the back of the truck. The coefficients of friction between the crate and the bed are μs = 0.41 and μk = 0.20. The truck drives on a straight, level highway at a constant 7.5 m/s. (a) What is the ...
February 16, 2012 by John

Physics
A 0.4 kg ball strikes a smooth level floor with a velocity of 5.0 m/s, 60 degrees below the horizontal.  It rebounds off the floor with an unknown velocity and reaches a maximum rebound height of 0.60 m. If the duration of the collision with the floor is 50 milliseconds, then...
October 25, 2012 by AH

physics
1. A man pulls a crate with a rope. The crate slides along the floor in the horizontal direction (x direction). The man exerts a force of 50 N on the rope, and the rope is at an angle q. Describe how the force components (Fx, Fy) change as the angle increases from 0 to 90 ...
November 20, 2013 by Ashley

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