Saturday

April 19, 2014

April 19, 2014

Number of results: 74,863

**physics**

A student wants to determine the coefficients of static friction and kinetic friction between a box and a plank. She places the box on the plank and gradually raises one end of the plank. When the angle of inclination with the horizontal reaches 25°, the box starts to slip, ...
*Thursday, September 16, 2010 at 1:48am by Anonymous*

**Physics**

A 295kg box is pulled at a constant speed by the little engine. The box moves a distance of 2.8 m across the horizontal surface. (μ=.20) How much energy is transferred by the engine? (How much WORK is done?)
*Friday, March 14, 2014 at 12:17am by Anonymous *

**Physics**

a horizontal force of 100N is used to push a 20 kg box across a level floor for 10 m. how much work is done? how much work is needed to raise the same box by 10m?
*Monday, February 27, 2012 at 11:19pm by Anonymous*

**physics**

In the figure below, a box of Cheerios (mass mC = 1.0 kg) and a box of Wheaties (mass mW = 3.5 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.0 N, and the ...
*Wednesday, September 23, 2009 at 9:53pm by Nick*

**physics**

In the figure below, a box of Cheerios (mass mC = 0.8 kg) and a box of Wheaties (mass mW = 2.5 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.0 N, and the ...
*Monday, April 26, 2010 at 8:04pm by bob*

**physics**

In the figure below, a box of Cheerios (mass mC = 0.8 kg) and a box of Wheaties (mass mW = 2.5 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.0 N, and the ...
*Monday, April 26, 2010 at 8:04pm by Darla*

**physics**

A box slides down a 26° ramp with an acceleration of 1.19 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.μk =
*Saturday, January 12, 2013 at 8:58pm by Amy Lee*

**physics**

A box slides down a 26° ramp with an acceleration of 1.19 m/s2. Determine the coefficient of kinetic friction between the box and the ramp. μk =
*Sunday, January 13, 2013 at 8:48pm by Davis Parker*

**Physics**

A 0.55 kg block slides across a tabletop with initial velocity of 3 m/s and it comes to rest in a distance of 0.53 m. Find the average friction force that retarded its motion.
*Thursday, September 29, 2011 at 12:53pm by Anonymous*

**physics**

A 0.5 kg block is sliding along a table top with an initial velocity of 0.2 m/s. It slides to rest in a distance of 70 cm. Find the frictional force that is slowing its motion.
*Thursday, October 25, 2012 at 3:14am by kimi*

**Physics**

A 254kg box is pulled at a constant speed by the little engine. The box moves a distance of 3.0 m across the horizontal surface. (μ=.20) How much energy is transferred by the engine? (How much WORK is done?) what is the answer in joules?
*Thursday, February 13, 2014 at 12:19pm by help*

**physics**

You are a member of an alpine rescue team and must get a box of supplies, with mass 3.00kg , up an incline of constant slope angle 30.0∘ so that it reaches a stranded skier who is a vertical distance 2.90m above the bottom of the incline. There is some friction present; ...
*Thursday, October 24, 2013 at 2:46pm by HELP*

**biomechanics**

Wb = m*g = 10.1kg * 9.8N/kg = 98.98 N.= Wt. of box. Fb = 98.98N @ 0 Deg. = Force of box. Fp = 98.98*sin(0) = 0 = Force parallel to floor. Fv = 98.98*cos(0) = 98.98 N. = Force perpendicular to floor. u = Coefficient of friction. Fn = Fap - Fp - u*Fv = ma. a = 0. 20.8 - 0 - u*98...
*Sunday, May 20, 2012 at 6:33pm by Henry*

**physics**

A box accidentally falls from the back of a truck and hits the groud with a speed of 15m/s forward. It slides along the groud with uniform acceleration for a distance of 45m before coming to rest. Determine the time it takes to slide the last 10m.
*Thursday, October 28, 2010 at 7:08pm by Anjali*

**physics**

A five kg box is pulled along a frictionless surface by a string just capable of suspending a 15 kg mass at rest. What is the maximum acceleration that can be given to the box?
*Friday, March 14, 2014 at 9:06pm by Swastika*

**physics**

a box slides down a smooth inclined plane 30m long and 10m high.determine the speed of the box at the bottom of the plane if it starts from rest at the top.
*Sunday, July 3, 2011 at 8:33pm by Anonymous*

**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...
*Saturday, November 12, 2011 at 4:48pm by holly*

**science**

A 4.0 kg box is raised from rest a distance of 6.0 m by a vertical force of 110 N.
*Sunday, October 10, 2010 at 8:12pm by ali*

**science**

A 4.0 kg box is raised from rest a distance of 6.0 m by a vertical force of 110 N. (a) Find the work done by the force. (b) Find the work done by gravity. (c) Find the final kinetic energy of the box.
*Sunday, October 10, 2010 at 8:17pm by ali*

**physics**

1. A ball moving horizontally clears a net 2 meters high. What maximum speed can it have if it is to fall within 5 meters of the net? 2.A pulley system lifts a load of 800 Newtons, 20 centimeters while the rope pulling it moves 100 cm. a. How much force must be applied to lift...
*Tuesday, October 18, 2011 at 4:05pm by mimi*

**algebra**

A shipping clerk wishes to determine the weights of each of the 4 boxes. Each box weighs a different integer amount less than 70 kg. Unfortunately, the only scales available measure weights in excess of 70 kg. The clerk therefore decides to weigh the boxes in pairs so that ...
*Thursday, February 23, 2012 at 5:55pm by Jackie *

**Penn Foster**

You're welcome. Bobpursley is right. This question is certainly very old. I last used a light box to arrange slides about 20 years ago. I doubt if any schools even have slide projectors today.
*Wednesday, June 22, 2011 at 12:39pm by Ms. Sue*

**phisics**

A puck of mass m = 1.5 kg slides in a circle of radius r = 20 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.5 kg by a cord through a hole in the table. What is the speed of mass m that keeps the cylinder at rest?
*Thursday, November 5, 2009 at 5:51am by shosho*

**Engineering Fund.**

A large box whose mass is 19.0 kg rests on a frictionless floor. A mover pushes on the box with a force of 235 N at an angle 34.8° below the horizontal. Draw the box's free-body diagram and use it to determine the acceleration of the box. m/s2
*Thursday, October 4, 2012 at 5:38pm by josephz*

**Physics**

A 23.9kg box rests on a table. A 16 kg box is placed on top of the first box, as shown. determine the total in N that the table exerts on the first box.
*Tuesday, October 8, 2013 at 5:09pm by Marian*

**Physics**

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of F = 84.4 N at an angle of 64degrees. The acceleration of gravity is 9.8 m/s/s. The box of books has a mass of 14 kg and the coefficient of kinetic ...
*Sunday, October 30, 2011 at 5:49pm by Amanda*

**Physics**

A student moves a box of books down the hall by pulling on a rope attached to the box. The student pulls with a force of 179 N at an angle of 29.8 ◦ above the horizontal. The box has a mass of 42.2 kg, and µk between the box and the ﬂoor is 0.2. The acceleration ...
*Monday, December 10, 2012 at 9:14pm by Anonymous*

**physics**

If the 5.2 kg box is not moving, neither is the 2.1 kg weight. The weight's weight of 2.1 * 9.8 = 20.6 N is balanced by the string tension.
*Sunday, October 10, 2010 at 10:27pm by drwls*

**physics**

Two blocks with masses m1 = 1.10 kg and m2 = 3.10 kg are connected by a massless string, as shown in the Figure (the figure shows m1 on top of a box and m2 hanging off the side of the box). They are released from rest. The coefficent of kinetic friction between the upper block...
*Tuesday, February 28, 2012 at 3:53pm by meyer *

**physics**

Two blocks with masses m1 = 1.10 kg and m2 = 3.10 kg are connected by a massless string, as shown in the Figure (the figure shows m1 on top of a box and m2 hanging off the side of the box). They are released from rest. The coefficent of kinetic friction between the upper block...
*Tuesday, February 28, 2012 at 3:55pm by meyer *

**Physics**

A box which has a mass of 14kg is sliding along a horizontal surface with a velocity of 18m/s when it encounters a frictionless inclined plane which meets the horizontal at an angle of 28 degrees. The box slides up the incline until it comes to a halt. How far up the incline ...
*Saturday, February 25, 2012 at 9:04pm by Rob*

**Physics**

A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 188.0 N at an angle of 26° with the horizontal. The box has a mass of 30 kg, and the coefficient of kinetic friction between the box and the floor is 0.45. Find...
*Saturday, January 12, 2013 at 9:00pm by T.J.*

**physics/math**

A puck of mass m = 1.10 kg slides in a circle of radius r = 16.9 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.20 kg by means of a cord that extends through a hole in the table. What speed keeps the cylinder at rest?
*Friday, March 22, 2013 at 2:13pm by HP*

**Physics**

a force of 400 N Pushes on a 30 kg box. Starting from rest, the box attains a speed of 4 m/s in 5 seconds. determine the mu between the box and floor.
*Wednesday, December 14, 2011 at 9:17am by Eileen*

**Physics**

(Apparently, I'm not allowed to post URLs, but this question is better illustrated by a diagram, i39. tinypic. com/ 17e336. jpg) <--P--[BOX A]<--Q--[BOX B]<--R--[BOX C] There are three boxes attached together with string and being pulled across a frictionless surface...
*Monday, March 9, 2009 at 9:18pm by Lucy X*

**physics**

A 2.7 kg block, starting from rest, slides down a ramp with friction. The top of the ramp is 1.5 m above the ground; the bottom of the ramp is h = 0.25 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance d away. Find the distance ...
*Monday, May 31, 2010 at 9:43am by amy*

**physics**

A 1.9 kg block slides down a frictionless ramp, as shown in figure 8-28. The top of the ramp is 1.5 m above the ground; the bottom of the ramp is .25 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance d away. Find the distance d.
*Wednesday, October 20, 2010 at 2:31am by tony*

**physics**

A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 188.0 N at an angle of 26° with the horizontal. The box has a mass of 30 kg, and the coefficient of kinetic friction between the box and the floor is 0.45. Find...
*Sunday, January 13, 2013 at 8:52pm by Angel R.*

**physics**

A 1.5 kg box moves back and forth on a horizontal frictionless surface between two springs.? The box is initially compressed against the stronger spring, K=32 N/cm, 4.0 cm and released from rest. The smaller box is K=16 N/cm. A) By how much will the box compress the weaker ...
*Monday, December 14, 2009 at 5:33pm by mary ann *

**physics**

A 1.80-kg block slides down a frictionless ramp.The top of the ramp is h1 = 1.21 m above the ground; the bottom of the ramp is h2 = 0.256 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance $d$ away. Calculate the distance d.
*Wednesday, March 5, 2014 at 6:19pm by Ted*

**physics**

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
*Thursday, February 9, 2012 at 1:00pm by sanya*

**physics**

Two boxes are connected by a cord running over a pulley as shown in the picture below. Box I of mass 8.0 kg is on the top of the table; the coefficient of kinetic friction between box I and the table is 0.10. Box II has a mass of 15.0 kg. What is the tension in the cord? 35 N ...
*Wednesday, February 5, 2014 at 6:10pm by ashley*

**physics**

The red box has a mass of 25.2 kg and the blue box has a mass of 12.5 kg and the force is 211 N. To the nearest tenth of a m/s2 what is the acceleration of the combination?
*Saturday, March 23, 2013 at 8:23pm by Anonymous*

**PHYSICS**

Two horizontal forces, F1 and F2, are acting on a box, but only F1 is shown in the drawing. F2 can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that = +6.2 N and the mass of the box...
*Wednesday, February 2, 2011 at 8:13pm by Tiffany*

**physics**

Use a conservation of energy method. Initial KE + gravitational PE loss = spring potential energy. (1/2) (m + M) Vo^2 + (m + M) g H = (1/2) k X^2 Vo is the initial velocity after getting onto the bobsled. It is less than 14.7 m/s, because there will be some inelastic energy ...
*Saturday, October 31, 2009 at 9:26pm by drwls*

**Physics**

1)An elevator is moving down with an acceleration of 1.40 m/s^2. A 14.5 kg block hangs from a spring balance fixed to the roof of the elevator. What is the apparent weight of the block? m*g+m*a 14.5*9.80+14.5*1.40 142.1+20.3 162.4 N 2)A 2.7 kg box is released on a horizontal ...
*Tuesday, April 15, 2008 at 8:51pm by Jon*

**physics**

In the figure, block 1 of mass m1 slides from rest along a frictionless ramp from height h = 2.8 m and then collides with stationary block 2, which has mass m2 = 2m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction μk is 0.3 and...
*Wednesday, November 13, 2013 at 4:38pm by kristy*

**physics**

An object of mass M = 4 kg slides from rest a distance d = 2 m down a frictionless inclined plane where it encounters a spring. It compresses the spring a distance D = 1.2 m before stopping. The inclined plane makes an angle q = 20° with the horizontal. a) When the block just ...
*Sunday, March 11, 2012 at 10:48pm by Mel*

**Physics**

A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient of kinetic friction between the box and the table is .3 and the box slides at a constant speed of .5m/s what is the weight of the hanging mass? ...
*Wednesday, November 14, 2007 at 5:19pm by Andrea*

**physics**

In the figure here, a box of Cheerios (mass mC = 1.4 kg) and a box of Wheaties (mass mW = 3.3 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.1 N, and the ...
*Wednesday, October 16, 2013 at 9:08pm by adek*

**physics 231**

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
*Thursday, February 9, 2012 at 3:16pm by sanya*

**Physics**

A 15 kg box sits on a horizontal force. the coefficient of static fricition between the box and the surface is 0.70. if a force P is exerted on the box at an angle directed 37 degrees below the horizontal, what must be the magnitude of P to get the box moving??
*Sunday, August 26, 2012 at 8:07pm by Teresa*

**Physics**

A 15 kg box sits on a horizontal force. the coefficient of static fricition between the box and the surface is 0.70. if a force P is exerted on the box at an angle directed 37 degrees below the horizontal, what must be the magnitude of P to get the box moving??
*Monday, August 27, 2012 at 6:06am by Daniella*

**physics repost**

)An elevator is moving down with an acceleration of 1.40 m/s^2. A 14.5 kg block hangs from a spring balance fixed to the roof of the elevator. What is the apparent weight of the block? m*g+m*a 14.5*9.80+14.5*1.40 142.1+20.3 162.4 N 2)A 2.7 kg box is released on a horizontal ...
*Wednesday, April 16, 2008 at 3:02am by Anonymous*

**physics**

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 10 kg and m2 = 19 kg. A force of 46 N is applied to the 19 kg box. Repeat the problem for the case where the coefficient of kinetic friction between each...
*Thursday, October 4, 2012 at 11:57pm by Anonymous*

**physics**

A box whose mass is 20 kg rests on a frictionless ramp with a 15 degree (upward) slope. A mover pulls up on a rope attached to the box to pull it up the incline. If the rope makes an angle of 40 degree with the horizontal, what force does the mover have to exert in order for ...
*Saturday, November 11, 2006 at 12:09am by David S.*

**Geometry**

Imagine a piece of square paper that measures 20 by 20 cm. You can make a box (with no lid) by cutting a square of the same size from each corner and folding up what's left to make a box. Keeping the lengths of each sides integers, what is the maximum volume box that can be made?
*Thursday, December 5, 2013 at 1:13pm by Ella*

**physics**

A 5 kg box is pushed against a K= 40 n/m spring on a horizontal surface and the spring is compressed 0.12m. The box is released and travels for 1.4 meters before comin to a stop. What is the coefficent of friction between the floor and the box. How fast was the box moving when...
*Sunday, November 16, 2008 at 8:26pm by jeff*

**Physics**

Please help ~ Two blocks are arranged at the ends of a massless string as 3.21 kg (box hanging from table) 4.96 kg (box on table). The system starts from rest. When the 3.21 kg mass has fallen through 0.4 m, its downward speed is 1.27 m/s. The acceleration of gravity is 9.8 m/...
*Monday, February 21, 2011 at 1:07am by CR*

**Physics **

There is a box resting on a table connected to a second box hanging off the edge of the table by a string that is run through a pulley. The mass of the first box is 3.50 kg. and The mass of the second box is 2.8 kg. What is the tension in the string connecting the two boxes ...
*Thursday, February 16, 2012 at 11:45pm by Nicole*

**physics**

A box slides down a 33.3 ◦ ramp with an acceleration of 1.07 m/s 2 . The acceleration of gravity is 9.8 m/s 2 . Determine the coeﬃcient of kinetic friction between the box and the ramp.
*Thursday, December 6, 2012 at 10:31pm by Anonymous*

**physics**

In Figure block 1 of mass m1 slides from rest along a frictionless ramp from height h = 3.10 m and then collides with stationary block 2, which has mass m2 = 5.00m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction μk is 0.550 ...
*Wednesday, February 27, 2008 at 11:06pm by gia*

**Math**

2.20 pounds/kg for example 50 kg ( 2.20 lb/kg) = 110 lb or 150 lb (1 kg/2.20 lb) = 68.2 kg
*Sunday, November 30, 2008 at 3:24pm by Damon*

**Physics...Friction**

A 75 kg box slides down a 25 degree ramp with an acc. of 3.6 m/s2. find mu,k between the box and the ramp. Write down Newton's second law for the direction of motion. "a" is the acceleration. Mg sin 25 - M g cos 25 *mu,k = M a The first term is the weight component along the ...
*Saturday, February 24, 2007 at 9:44pm by Christy*

**physics**

A 31.0 kg object slides down a slope which is inclined at an angle of 20.0o to the horizontal. What is the normal force exerted by the slope?
*Friday, October 28, 2011 at 9:55am by Nick*

**Physics**

A box, with a weight of mg = 25 N, is placed at the top of a ramp and released from rest. The ramp measures 4.40 meters horizontally and 3.50 meters vertically. The box accelerates down the incline, attaining a kinetic energy at the bottom of the ramp of 54.0 J. There is a ...
*Sunday, October 30, 2011 at 4:02pm by Jeanne*

**physics**

A thin, light horizontal string is wrapped around the rim of a 4.00-kg solid uniform disk that is 30.0 cm in diameter. A box is connected to the right end of the string and moves to the right along the ground horizontally with no friction. The box is subjected to a horizontal ...
*Tuesday, December 4, 2012 at 1:49am by toby*

**physics **

a 1.5 kg box moves back and forth on a horizontal frictionless surface between two different springs. the box is initially pressed against the stronger spring compressing it 4.0 cm , and then is released from rest,A) by how much will the box compress the weaker spring,B) what ...
*Tuesday, April 27, 2010 at 8:59pm by brad*

**Physics**

Two blocks are arranged at the ends of a massless string as shown in the figure. The system starts from rest. When the 3.21 kg mass has fallen through 0.4 m, its downward speed is 1.27 m/s. The acceleration of gravity is 9.8 m/s2 . 3.21 kg (box hanging from table) 4.96 kg (box...
*Sunday, February 20, 2011 at 10:00pm by CR*

**physics **

A box slides across a frictionless floor with an initial speed v = 1.8 m/s. It encounters a rough region where? If instead the strip is only 0.413265306122449 m long, with what speed does the box leave the strip? vf =
*Tuesday, February 28, 2012 at 4:29pm by Lisa *

**Physics**

A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 174.0 N at an angle of 27.0 degrees with the horizontal. The box has a mass of 39.0 kg, and the coefficient of kinetic friction between the box and floor is 0....
*Tuesday, March 15, 2011 at 9:06pm by Chris*

**PHYSICS URGENT! PLEASE FRICTION CASE 2**

A 13 kg box is at rest on a level floor. The coefficient of static friction µS = 0.9 and the coefficient of kinetic friction µK = 0.8. Audrey is applying a 140 N push at an angle (=20°) as shown in Figure 1. C) What is the magnitude of FNormal on box from Earth?
*Tuesday, December 4, 2012 at 7:14pm by Sophia*

**math**

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg)?
*Monday, March 18, 2013 at 8:09pm by Sarah*

**physics**

a box whose mass is 0.3 kg is pushed against a spring(k=40n/m) on a horizontal surface and the spring is compressed 0.12m. The box is released and travels for 1.4 meters before coming to a stop. What is the coefficient of friction between the floor and the box? How fast was ...
*Thursday, November 6, 2008 at 9:26pm by jeff*

**physics**

A student moves a box of books down the hall by pulling on a rope attached to the box. The student pulls with a force of 173 N at an angle of 27.5 above the horizontal. The box has a mass of 27 kg, and μk between the box and the floor is 0.2. The acceleration of gravity ...
*Tuesday, November 6, 2012 at 10:57pm by scott*

**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.
*Monday, September 26, 2011 at 4:15pm by jeff*

**Physics**

Block 1 of mass m1 slides from rest along a frictionless ramp from height h and then collides with stationary block 2, which has mass m2 = 3m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction is μk and comes to a stop in ...
*Tuesday, November 1, 2011 at 5:38pm by Isabel*

**physics**

A 5.2 kg box is on a frictionless 36 degree slope and is connected via a mass less string over a mass less, frictionless pulley to a hanging 2.1 kg weight. What is the tension in the string if the 5.2 kg box is held in place, so that it cannot move?
*Sunday, October 10, 2010 at 10:27pm by Taylor*

**physics**

A block of mass m = 2.00 kg slides down a 30.0° incline which is 3.60 m high. At the bottom, it strikes a block of mass M = 7.20 kg which is at rest on a horizontal surface Determine the speeds of the two blocks after the collision. lighter block = heavier block = what would ...
*Thursday, March 24, 2011 at 3:53pm by Haley*

**physics**

A box,is resting on a smooth(frictionless)table.The mass of the box is 10 kg. (a)Determine the weight of the box and the normal force acting on(b)If the box is pushed down with a force of 40 Newton determine the normal force(c) If the box was pulled up with a force of 40 ...
*Tuesday, July 22, 2008 at 10:59pm by Jodie*

**PHYSICS**

A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity at a distance of 0.5 m from the fulcrum...
*Sunday, March 6, 2011 at 11:45pm by DMITRIC*

**PHYSICS**

A box is lifted with a pry bar, by slipping the bar under the box and lifting up on the bar. If the pry bar is 2m in length and it is grasped at the end, and the box is located at the opposite end, the fulcrum, with its center of gravity at a distance of 0.5 m from the ...
*Monday, March 7, 2011 at 10:58am by CHRIST*

**Physics Energy and Work**

A 20.0 kg child on skis, initially at rest, slides 2.0 m down an incline at an angle of 20.0 degrees with the horizontal. If there is no friction between incline and skis, what is the kinetic energy of the child at the bottom of the incline?
*Tuesday, November 27, 2012 at 7:06pm by Rose*

**physics**

A 2 kg mass is released from rest and slides down an inclined plane of 60 degrees a distance of 1 meter. It strikes a 250 N/m spring. What is the maximum compression of a spring? No one has answered this question yet.
*Sunday, November 22, 2009 at 12:15pm by Jon*

**Physics**

When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if this block slides the same distance up the incline? a) 300 J b) zero c) -300 J d) It cannot be determined without knowing the distance the block ...
*Sunday, March 25, 2007 at 4:41pm by Tammy*

**Science**

it is one of: a box of mineral water (15 kg) Andy Murray and Novak Djokovic (162 kg) Four bags of cement (200 kg) Tiger (320 kg)
*Wednesday, November 17, 2010 at 6:41pm by djoko*

**physics**

Jen pushed a box for a distance of 80m with 20 N of force. How much work did she do?
*Monday, December 17, 2012 at 4:27pm by Anonymous*

**Physics ASAP**

Use the following numbers for this question. MEarth 5.98e+24 kg MJupiter 1.9e+27 kg MSun 2e+30 kg Earth-Sun distance 150000000000 m Jupiter-Sun distance 778000000000 m rE 6380000 m rJ 69000000 m G = 6.67e-11 Nm2kg-2 the acceleration due to gravity at the surface of Jupiter has...
*Sunday, November 18, 2012 at 11:22pm by Sierra*

**physics**

A box with a mass of 2 kg is lifted (without acceleration) through a height of 8.0 m in order to place it upon the shelf of a closet. (a) What is the increase in potential energy of the box? 1 . J (b) How much work was required to lift the box to this position? 2 J
*Monday, March 5, 2012 at 9:56pm by Sara*

**physics**

A box with a mass of 40.0 kg is pulled along a level floor at a constant speed by a rope that makes an angle of 20.0o with the floor as shown below. If the force on the rope is 200 N, then coefficient of sliding friction or ) between the box and the floor is: a) 0.58 b) 0.48 c...
*Thursday, January 20, 2011 at 10:37pm by Anonymous*

**Pressure and Force**

Hello, I am looking for the equation to solve this problem: 1. A .75 kg object with dimensions 24 and 20 are on a table. What force does the object apply to the table? What pressure does the book apply? Thanks! Force = Mass * Acceleration (or in this case, gravity) F = (.75kg...
*Saturday, October 7, 2006 at 8:17pm by Lisa*

**MATH**

a box contains 20 slips of papers, numbered 1-20. A slip of paper is drawn from the box and the number is noted. Find the probability that it is a positive integer less than 21.
*Monday, October 3, 2011 at 9:22pm by Katie*

**PowerPoint sound**

I have an older version of PowerPoint. Here's how you could add sound to the slides. 1. open power point, and display the slide to which sound is to be added. 2. From the menu, open the SlideShow/CustomAnimation dialog box. 3. In the box "check to animate slide objects", ...
*Friday, September 25, 2009 at 5:39pm by MathMate*

**physics**

A 9.0-kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. What is the coefficient of kinetic friction, k , of the surface ...
*Wednesday, April 6, 2011 at 12:42pm by Mesho*

**physics**

reaction time = 0.8 seconds at 20 m/s distance = 0.8 s * 20 m/s = 16 m. From v0²-v² = 2aS where v0 and v are initial and final velocities, a, acceleration S, distance travelled braking distance = (0-20²)/(2*(-7 m/s²)) = 40.8 m. Total distance = ?
*Monday, September 28, 2009 at 11:14pm by MathMate*

**Physics 1**

A 50.0-kg block and 100-kg block are connected by a string as in Figure P8.36. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between the 50-kg block and incline is 0.250. Determine the change in the kinetic energy of the 50-kg block as ...
*Thursday, October 20, 2011 at 9:00pm by Anonymous*

**Physics**

A 25.0 Kg sled with a rope attached is being pulled down a slope with a 21 degree angle. There is an 8 Kg box on the sled.The tension gradually increases. At what value of tension does the box slip?
*Monday, November 8, 2010 at 8:36am by Janice*

**physics**

A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring is stretched only by ...
*Tuesday, July 16, 2013 at 3:52pm by sammy*

**physic**

A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring is stretched only by ...
*Monday, January 20, 2014 at 7:41pm by nada*

**RE: PHYSICS**

A stationary block explodes into two pieces L and R that slide across a frictionless floor and then into regions with friction, where they stop. Piece L, with a mass of 2.0 kg, encounters a coefficient of kinetic friction µL = 0.40 and slides to a stop in distance dL = 0.15 m...
*Monday, February 26, 2007 at 4:11pm by COFFEE*

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