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April 17, 2014

Search: A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 0.9 s. Find the time it takes for the ball to fall from rest all the way to the ground

Number of results: 22,127

physics
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway is 1.6 seconds. Find the time it takes for the ball to fall from rest all the way to the ground.
Tuesday, September 16, 2008 at 10:17pm by nj

physics
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fail halfway to the ground is 1.2s. Find the time it takes for the ball to fall from rest all the way to the ground. Can anyone give me some hints to do this? ...
Saturday, October 6, 2007 at 3:50pm by ajo

physics
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 4.36 s. Find the time it takes for the ball to fall from rest all the way to the ground.
Monday, February 7, 2011 at 11:37am by shaknocka

physics
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fall halfway to the ground is 1.4 s. Find the time it takes for the ball to fall from rest all the way to the ground.
Monday, October 3, 2011 at 7:07pm by Anonymous

physics
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. The time it takes for the ball to fail halfway to the ground is 1.2s. Find the time it takes for the ball to fall from rest all the way to the ground. Can anyone give me some hints to do this? ...
Saturday, October 6, 2007 at 3:50pm by tchrwill

physics
A 6840 N wrecking ball hangs from the end of a steel cable. What is the net force acting on the wrecking ball if the cable snaps? equation please and explain
Wednesday, October 13, 2010 at 5:56pm by Bansnoob

physics
A 1100 wrecking ball hangs from a 10 -long cable. The ball is pulled back until the cable makes an angle of 28.0 with the vertical.By how much has the gravitational potential energy of the ball changed?
Monday, January 28, 2013 at 9:31pm by Mak

Physics
A 1200 wrecking ball hangs from a 20 -long cable. The ball is pulled back until the cable makes an angle of 30.0 with the vertical.By how much has the gravitational potential energy of the ball changed?
Saturday, April 16, 2011 at 6:17pm by Mike aloe

physics
a 1100 kg wrecking ball hangs from a16m long cable. the ball is pulled back until the cable makes an angle of 17 with the vertical. By how much has the gravitational potential energy of the ball changed?
Monday, November 26, 2012 at 6:17pm by kelly

college physics
A 1100 kg wrecking ball hangs from a 14m-long cable. The ball is pulled back until the cable makes an angle of 17.0 degrees with the vertical.By how much has the gravitational potential energy of the ball changed?
Wednesday, June 22, 2011 at 5:22pm by Bethany

college physics
A 1500 wrecking ball hangs from a 16 -long cable. The ball is pulled back until the cable makes an angle of 23.0 with the vertical.
Thursday, February 16, 2012 at 11:39pm by stew

Physics
A crane with a movable pulley system on a horizontal arm is moving a large container. The 355 kg container is hanging from a cable that is 6.15 m out on the 7.50 m arm. The arm has a mass of 345 kg. A cable that is attached to its end makes and angle 32.0 degrees with the ...
Sunday, April 7, 2013 at 5:56pm by Bella

Physics
A 1,500 kg crate hangs motionless from a crane cable. What is the tension in the cable? Ignore the mass of the cable. Suppose the crane accelerates the crate upward at 1.2 m/s2. What is the tension in the cable now?
Tuesday, October 5, 2010 at 5:47pm by Anonymous

Pre-Calc
A wrecking ball attached to a crane swings back and forth. The distance that the ball moves to the left and right of its resting position with respect to time is represented by the following graph.
Friday, November 15, 2013 at 9:12pm by lisa

physics
A 25 ft long crane supported at its lower end by a pin is elevated by a horizontal cable. A 250 lb load is suspended from the outer end of the crane. The center of gravity of the crane is 10 ft from the pin and the crane weighs 200 lb. What is the tension in the horizontal ...
Thursday, December 3, 2009 at 1:31pm by sandhya

Science
A crate of mass 2000 kg is hanging from a crane at the end of a cable 12 m long. If we attach a horizontal rope to this crate and gradually apply a pull of 1800 N, what angle will the cable finally make with the vertical?
Thursday, September 29, 2011 at 12:12am by May

physics
A wrecking ball (weight 4140 N) is supported by a boom, which may be assumed to be uniform and has a weight of 2550 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32 degrees, and ...
Saturday, June 9, 2007 at 12:54pm by annie

Physics
An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. b) How far does the box travel up to the moment the ...
Tuesday, October 11, 2011 at 12:25am by Ivo

Physics
an electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350 N amd the box accelerates at 1.2 m/s^2 [forward] for 5 seconds. the cable breaks and the box slows down and stops. calculate the coefficient of kinetic friction? ...
Sunday, October 9, 2011 at 12:42pm by marr

Physics
A crane is holding a bloc of metal of 10 000kg. If the crane's arm weights 1000kg and is 10,0m long, what is the tension in cable a and how big is the force exerted on the pivot of the cranes arm. the cable passes through the top of the cranes arm and then is vertical whilst ...
Monday, February 20, 2012 at 9:16pm by Raf

Physics
A crane is holding a bloc of metal of 10 000kg. If the crane's arm weights 1000kg and is 10,0m long, what is the tension in cable a and how big is the force exerted on the pivot of the cranes arm. the cable passes through the top of the cranes arm and then is vertical whilst ...
Tuesday, February 21, 2012 at 9:51am by Raf

Physics(2)
A crane is holding a bloc of metal of 10 000kg. If the crane's arm weights 1000kg and is 10,0m long, what is the tension in cable a and how big is the force exerted on the pivot of the cranes arm. the cable passes through the top of the cranes arm and then is vertical whilst ...
Wednesday, February 22, 2012 at 10:31am by Raf

physics
A heavy piece of equipment(85kg) is being moved by elevator between floors in a building. Two identical small cranes are used. A cable connecting each crane to a mounting hook on the top of the piece of equipment.The cable from one crane is at an angle of 22 degree below the ...
Wednesday, September 5, 2012 at 10:13am by Emily

Physics
An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from the moment the cable ...
Monday, October 29, 2012 at 10:43pm by Lala

Physics
An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from the moment the cable ...
Monday, October 29, 2012 at 10:43pm by Lala

Phsyics
In a shipping yard, a crane operator attaches a cable to a 1130-kg shipping container and then uses the crane to lift the container vertically at a constant velocity for a distance of 30 m. Determine the amount of work done by each of the following. (a) the tension in the ...
Wednesday, March 26, 2014 at 1:36pm by ANdy

physics
A wrecking ball (weight = 4880 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3520 N. As the drawing below shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is θ1...
Sunday, November 17, 2013 at 10:06am by ERsa

Physics
An 1567 kg car, being lifted at a steady speed by a crane, hangs at the end of a cable whos radius is .0084. The cable is 5m in length and stretches by .0081 becuase of the weight of the car. What is young's modulus for the cable?
Monday, March 31, 2008 at 7:07am by Erich

Physics
A sign is supported by a cable and a horizontal beam.The beam has a length 1.4 m and a uniform mass of12 kg.a) If the cable is attached to the beam at a distance of 1.0 m from the hinge, what is the tension in the cable? (b) If the cable breaks, what is the net torque on the ...
Saturday, October 24, 2009 at 11:13pm by Sandhu

physics, torque
A crane shown in the drawing is lifting a 170-kg crate upward with an acceleration of 1.8 m/s2. The cable from the crate passes over a solid cylindrical pulley at the top of the boom. The pulley has a mass of 130 kg. The cable is then wound onto a hollow cylindrical drum that ...
Monday, June 4, 2007 at 12:35pm by Marigold

Physics: Buoyancy
A crane lifts the 23000 kg steel hull of a ship out of the water. Determine the following. (a) the tension in the crane's cable when the hull is submerged in the water
Sunday, January 27, 2013 at 11:36pm by Seth

Physics: Buoyancy
A crane lifts the 23000 kg steel hull of a ship out of the water. Determine the following. (a) the tension in the crane's cable when the hull is submerged in the water
Sunday, January 27, 2013 at 11:40pm by Seth

science
That means that the weight does positive work on the crane. We could use that if we were smart to run a generator connected to the crane cable to charge the battery on the crane. Regenerative braking systems on electric and hybrid vehicles work this way. Instead of forcing a ...
Friday, February 19, 2010 at 4:55pm by Damon

physics
A mass m1 = 10 kg on top of a rough horizontal table surface is connected by a massless cable over a frictionless wheel to a hanging mass m2 = 5 kg, as shown in the previous problem. In m2 falls 1 m from rest in 1.2 seconds, find the co-efficient of kinetic friction between m1...
Monday, October 8, 2012 at 1:07pm by kim

physics
a 10kg wood ball hangs from a 1.1 m long wire. The maximum tension the wire can withstand without breaking is 600N. a .9 kg projectile traveling horizontally hits and embeds itself in the wood ball. What is the largest speed the the projectile can have before the cable breaks
Sunday, October 2, 2011 at 9:53pm by Sandra

Physics
After an unfortunate accident at a local warehouse you have been contracted to determine the cause. A jib crane collapsed and injured a worker. The horizontal steel beam had a mass of 88.50 kg per meter of length and the tension in the cable was T = 11.78 kN. The crane was ...
Tuesday, November 15, 2011 at 6:16pm by Morgan

PHYSICS!!
A ball on the end of a string is whirled around in a horizontal circle of radius 0.386 m. The plane of the circle is 1.10 m above the ground. The string breaks and the ball lands 2.00 m (horizontally) away from the point on the ground directly beneath the ball's location when ...
Saturday, November 1, 2008 at 9:42pm by mike

physics
an electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350 N amd the box accelerates at 1.2 m/s^2 [forward] for 5 seconds. the cable breaks and the box slows down and stops. calculate the coefficient of kinetic friction?
Sunday, October 9, 2011 at 12:41pm by marr

physics
A 2940 kg demolition ball swings at the end of a 16.9 m cable on the arc of a vertical circle. At the lowest point of the swing, the ball is moving at a speed of 8.28 m/s. Determine the tension in the cable.
Thursday, February 24, 2011 at 10:04pm by thaokieu

physcis
A 2520 kg demolition ball swings at the end of a 23.9 m cable on the arc of a vertical circle. At the lowest point of the swing, the ball is moving at a speed of 8.97 m/s. Determine the tension in the cable.
Sunday, February 19, 2012 at 2:03pm by KayLyn

physics
A 2490 kg demolition ball swings at the end of a 35.9 m cable on the arc of a vertical circle. At the lowest point of the swing, the ball is moving at a speed of 7.26 m/s. Determine the tension in the cable.
Sunday, February 19, 2012 at 8:58pm by Shelby

Physics
A ball on the end of a string is whirled around in a horizontal circle of radius 0.486 m. The plane of the circle is 1.83 m above the ground. The string breaks and the ball lands 2.39 m away from the point on the ground directly beneath the ballís location when the string ...
Monday, January 28, 2013 at 11:22am by Emily

Physics
A ball on the end of a string is whirled around in a horizontal circle of radius 0.486 m. The plane of the circle is 1.83 m above the ground. The string breaks and the ball lands 2.39 m away from the point on the ground directly beneath the ballís location when the string ...
Monday, January 28, 2013 at 6:24pm by Allisa

Physics
A ball on the end of a string is whirled around in a horizontal circle of radius 0.33 m. The plane of the circle is 1.21 m above the ground. The string breaks and the ball lands 2.22 m away from the point on the ground directly beneath the ballís location when the string ...
Tuesday, March 12, 2013 at 8:19pm by Mike Undi

Science
WHen a wrecking ball hits a wall, it is usually moving at about 10 km/h, which is not very fast. How can this ball knock down a solid wall?
Thursday, January 19, 2012 at 3:39pm by Micheal

Physics
a) (1/2) a t^2, where a = 1.2 m/s^2 t = 5.0 s b) Speed at cable breakage = a t V' = 6 m/s Let distance travelled after cable breakage be X. M g X *Uk = (M/2) V'^2 You need the coefficient of kinetic friction Uk. You can get it from the initial cable tension, before it breaks. ...
Tuesday, October 11, 2011 at 12:25am by drwls

Physics Classical Mechanics
A crane is configured as below, with the beam suspended at two points l1 and l2 by each end of a cable passing over a frictionless pulley. The two ends of the cable each make an angle θ with the beam. A counterbalance object C with mass mC is fixed at one end of the beam...
Tuesday, November 26, 2013 at 10:24am by A

physics
The single cable supporting an unoccupied elevator breaks when the elevator is at rest at the top of a 155 m high building. With what speed does the elevator hit the ground?
Saturday, December 4, 2010 at 9:40pm by Brittany

physics
A ball on the end of a string is whirled around in a horizontal circle of radius 0.22 m. The plane of the circle is 1.69 m above the ground. The string breaks and the ball lands 2.68 m away from the point on the ground directly beneath the ballís location when the string ...
Friday, September 9, 2011 at 12:37am by squires

physics
determine the tension in each cable below. draw a force diagram for the system before solving the problem. Case A- ball suspended on one cable Case B- ball suspended on by two cables
Thursday, October 11, 2012 at 8:40pm by Madison

physics
Q. A 200 kg load is suspended by a cable from a crane . Two ropes are attached to the load , acting at 90 deg to each other. One rope exerts a pull of 220 N , at 10 deg below horizontal, the other rope exerts a force of 360 N at 15 deg below horizontal. Calculate 1)tension in ...
Friday, February 7, 2014 at 6:03am by john

Physics
A crane is lifting a 500kg payload straight up at a constant speed of 0.7ms-1. (a)What is the power output of the crane. (ignoring losses)? (b)If it takes the cran2 2 minutes to raise the payload to its final height, how far above the ground is this? (c)If the cable were to ...
Friday, September 21, 2012 at 9:05pm by Ellie

PHYSICS
The boom crane in the diagram is in static equilibrium and weighs 2000 N with its center of gravity in the middle of its length. It is supported by a frictionless pivot at the left end and a cable connected to the center of the boom and is supporting a load of 5000N at the ...
Monday, December 11, 2006 at 2:56pm by JENNY

college physics
a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force. a) chain with a weight of 2.5 N has a 1.0 N hanging weight b) chain with a weight of .5 N has a 1.0 N hanging weight c) stretched elastic band with negligible weight has a 1....
Thursday, March 8, 2012 at 12:15pm by Amber

Physics
a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force. a) chain with a weight of 2.5 N has a 1.0 N hanging weight b) chain with a weight of .5 N has a 1.0 N hanging weight c) stretched elastic band with negligible weight has a 1....
Sunday, March 11, 2012 at 2:26pm by Brandon

physics
A strip of rubber originally 75 mm long is stretched until it is 100 mm long. a.What is the tensile strain b.Why has the answer no units? c.The greatest tensile stress which steel of a particular sort of a particular sort can withstand without breaking is about 10>9 N m>...
Friday, December 27, 2013 at 2:08pm by farid

Physics
A crane lifts the 22000kg steel hull of a ship out of the water. Determine the tension in the crane's cable when the hull is submerged in the water. Determine the tension when the hull is completely out of the water.
Saturday, November 3, 2012 at 12:11pm by Sarah

physics
a crane drops a .3 kg steel ball onto a steel plate. the ball's speeds just before impact and after are 4.5 m/s and 4.2 m/s respectively. If the ball is in contact with the plate for .03 s, what is the magnitude of the average force that the ball exerts on the plate during ...
Thursday, December 4, 2008 at 11:17pm by jason

Physicssss please help
A helicopter is lifting two crates simultaneously. One crate with a mass of 151 kg is attached to the helicopter by cable A. The second crate with a mass of 79 kg is hanging below the first crate and attached to the first crate by cable B. As the helicopter accelerates upward ...
Sunday, February 12, 2012 at 3:25pm by Anonymous

Physicsss helppp pleaseee
A helicopter is lifting two crates simultaneously. One crate with a mass of 151 kg is attached to the helicopter by cable A. The second crate with a mass of 79 kg is hanging below the first crate and attached to the first crate by cable B. As the helicopter accelerates upward ...
Sunday, February 12, 2012 at 3:26pm by Anonymous

Phsyicssss PLease helppp ASAP
A helicopter is lifting two crates simultaneously. One crate with a mass of 151 kg is attached to the helicopter by cable A. The second crate with a mass of 79 kg is hanging below the first crate and attached to the first crate by cable B. As the helicopter accelerates upward ...
Sunday, February 12, 2012 at 6:24pm by Anonymous

Physics(Please respond)
1) A 1320 kg demolition ball swings at the end of a 34.3 m cable on the arc of a vertical circle. At the lowest point of the swing, the ball is moving at a speed of 3.32 m/s. Determine the tension in the cable. F=ma (34.3)(3.32) = 113.87 Ia this correct?
Tuesday, May 29, 2012 at 7:28pm by Hannah

Physics
The arm of a crane at a construction site is 13.1 m long, and it makes an angle of 20į with the horizontal. Assume that the maximum load the crane can handle is limited by the amount of torque the load produces at the base of the arm. (a) What is the magnitude of the maximum ...
Monday, March 21, 2011 at 6:27pm by Krista

science
what must the crane work against in order to lift the box upward? . wind . friction . gravity . cable tension
Wednesday, February 6, 2013 at 5:48pm by ninel

Cranes
08/09/2005 Physics A crane is lifting a 200 pound object. The crane boom is 50 ft long. The boom forms an 85 degree angle with the horizontal. What is the torque applied to the crane boom?
Sunday, October 23, 2011 at 11:23pm by Jerry

physics
A cue ball (mass = 0.140 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.60 N∑s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second ball of equal mass ...
Wednesday, December 7, 2011 at 7:03pm by s

Honors Physics
A mass, m1 = 5.00 kg, resting on a frictionless horizontal table is connected to a cable that passes over a pulley and then is fastened to a hanging mass, m2 = 9.0 kg. Find the acceleration of each mass and the tension in the cable. PLEASE HELP!
Tuesday, September 21, 2010 at 9:04pm by Chubba

Physics
A cue ball (mass = 0.150 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.45 N∑s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second ball of equal mass ...
Sunday, October 24, 2010 at 4:48pm by Xavier

physics
A cue ball (mass = 0.140 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.60 N∑s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second ball of equal mass ...
Wednesday, December 7, 2011 at 8:34pm by Anonymous

Science
Tracy ties a ball to a string and starts to swing the ball around her head what forces are acting on the ball what happens if the string breaks
Thursday, May 19, 2011 at 1:29pm by Joann

Physics 1
Two railroad cars, each of mass 2.2 104 kg, are connected by a cable to each other, and the car in front is connected by a cable to the engine as shown in the figure below. The cars start from rest and accelerate to a speed of 1.7 m/s after 1 min. a)Find the work done by cable...
Monday, October 8, 2012 at 8:33pm by John

Repost-Physics 1
Two railroad cars, each of mass 2.2 104 kg, are connected by a cable to each other, and the car in front is connected by a cable to the engine as shown in the figure below. The cars start from rest and accelerate to a speed of 1.7 m/s after 1 min. a)Find the work done by cable...
Tuesday, October 9, 2012 at 9:21pm by John

physics
A light inflexible cable is wrapped around a cylinder of mass , radius , and moment of inertia about the center of mass . The cylinder rotates about its axis without friction. The cable does not slip on the cylinder when set in motion. The free end of the cable is attached to ...
Sunday, November 10, 2013 at 4:18pm by Anonymous

physics
A 150 N block is at rest on a table, a cable is connected from this block to another hanging off of the table. This block is 75 N. What is the magnitude of the minimum force of static friction on the 150 N block required to hold both blocks at rest? What would the coefficient ...
Thursday, August 9, 2012 at 10:47am by kacey

physics
An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.
Monday, September 26, 2011 at 6:21pm by Dee

physics
An object with mass m1=5.00 kg rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2= 10.0 kg. Find the acceleration of each object and the tension in the cable.
Monday, September 26, 2011 at 6:22pm by Dee

Physics
Crane A has 2.0 as much power as Crane B. If Crane B can do 9492 Joules of work in 12.492 minutes, how many Joules of work can Crane A do in 12.492 minutes?
Wednesday, April 18, 2012 at 9:22pm by Anonymous

Physics
An object with mass m1 = 6.00 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2 = 8.0 kg, as shown in the figure below. Find the acceleration of each object and the tension ...
Wednesday, October 20, 2010 at 12:20am by Diana

physic
An object with mass m1 = 5.00 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2 = 10.0 kg, as shown in the figure below. Find the acceleration of each object and the tension ...
Thursday, October 15, 2009 at 4:47am by Chan

physic
An object with mass m1 = 5.00 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2 = 10.0 kg, as shown in the figure below. Find the acceleration of each object and the tension ...
Friday, October 16, 2009 at 4:29am by Chan

physics
a crane drops a 1.0 kg steel ball onto a steel plate. the ball's speed just before impact is 2.0 m/s. if the average impact force is 300 N, and the ball is in contact with the plate for 0.01 seconds, what is the bounce back speed right after the impact.
Monday, July 8, 2013 at 5:00pm by larry

Physics Help
A ball of mass 1.76 kg is tied to a string of length 4.19 m as shown in Figure P6.50. The ball is initially hanging vertically and is given an initial velocity of 9.4 m/s in the horizontal direction. The ball then follows a circular arc as determined by the string. What is the...
Monday, September 26, 2011 at 8:39pm by Kaylee

Physics
Problem 1- A 0.5 kg ball is moving to the right at 5 m/s when it is suddenly collide by a wall that exerts on it a horizontal force of 2.5 N for a period of 0.8 s. a) What is the impulse does the force of the wall exert on the ball? b) What is the velocity of the ball after ...
Sunday, January 12, 2014 at 1:13pm by Mariam

science
at a construction site a crane lifts a block of mass,m,vertically upwards through a height of 70 m at constant speed by means of a strong cable.The block experiences a force of magnitude 8 N as a result of air friction as it is lifted vertically upwards. The cable does 377 860...
Tuesday, March 26, 2013 at 10:08am by Thalente

Physics
The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 72.4-kg person straight up by means of a cable. The person has an upward acceleration ...
Tuesday, February 26, 2013 at 3:57pm by Randy

physics
The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 85.8-kg person straight up by means of a cable. The person has an upward acceleration ...
Monday, November 4, 2013 at 2:47pm by Anonymous

physics
A heavy concrete panel is being lifted into position in a building by means of a crane . The tension of 2.17 104 N in the supporting cable produces a torque with respect to point O. (Let L = 42.0 m.)
Thursday, December 6, 2012 at 7:36pm by Anonymous

Math
Two cranes can unload a ship together in 15 hours. The faster crane takes 16 hours less than the slower crane, if each were to unload the same ship alone. How long does it take for each crane to unload a ship
Monday, May 21, 2012 at 1:15pm by Jasmine

physics
A rescue helicopter lifts a 85.2-kg person straight up by means of a cable. The person has an upward acceleration of 0.764 m/s2 and is lifted from rest through a distance of 12.5 m. (a) What is the tension in the cable? How much work is done by (b) the tension in the cable and...
Monday, February 28, 2011 at 11:24am by shaknocka

physics
A rescue helicopter lifts a 85.8-kg person straight up by means of a cable. The person has an upward acceleration of 0.643 m/s2 and is lifted from rest through a distance of 13.1 m. (a) What is the tension in the cable? How much work is done by (b) the tension in the cable and...
Monday, November 4, 2013 at 2:48pm by Anonymous

Statistics
A survey of 815 students is asked whether or not they have cable TV and Internet cable in their rooms at home. Results of the survey showed that 69% of students has cable TV, 58% of students has Internet cable and 37% of students has both cable TV and Internet cable. Suppose, ...
Tuesday, September 18, 2012 at 10:42pm by Ben

physics
A crane lifts a concrete hopper of mass 370 kg from the ground to the top of a 38 m building that is under construction. The hopper moves with a constant speed during the lift. The power rating of the crane motor is 8.2 kiloWatts. How much work does the crane do in lifting the...
Sunday, February 20, 2011 at 8:16pm by sam

momentun
A small steel ball B is at rest on the edge of a table of height h=1m. Another steel ball A, used as the bob of a simple pendulum also of length h=1m, is released from rest with the pendulum suspension horizontal, and swings against B as shown in the diagram.The masses of the ...
Monday, April 22, 2013 at 6:12pm by Anonymous

physics
You stand at the top of a cliff while your friend stands on the ground below you. You drop a ball from rest and see that it takes 0.90 for the ball to hit the ground below. Your friend then picks up the ball and throws it up to you, such that it just comes to rest in your hand...
Sunday, January 30, 2011 at 5:46pm by SAM

math
The diameter of a wrecking ball used to tear down buildings is 3.5 ft. What is the volume (to the nearest hundredth)? Is there enough information given? Do I use formuls of v=4/3*pi*r(squared) Hope it makes sense
Thursday, June 14, 2012 at 9:36pm by Leo

Physics
A 5-kg ball is at rest when it is struck head-on by a 2-kg ball moving along a track at 10 m/s. If the 2-kg ball is at rest after the collision, what is the speed of the 5-kg ball after the collision?
Monday, March 24, 2014 at 8:05pm by Amanda

Physics
A ball is moving at 82 m/s when it hits a ball at rest which has a mass fours times as big as its own. The formally stationary ball leaves the collision with a speed of 7.5 m/s what is the final velocity of the first ball?
Wednesday, March 21, 2012 at 3:53pm by Becky

Physics
A 0.421-kg ball has an elastic, head-on collision with a second ball that is initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy (ΔK/K) is ...
Wednesday, June 6, 2012 at 9:04am by James

physics
a magnetic crane left a mass 1500 through a vertical height of 40m.calculate the work done in operating the crane
Tuesday, November 1, 2011 at 2:34am by sasi

Physics
crane lifts a 75 kg girder 8.85 m. How much work does the crane do lifting with an upward acceleration of 1.20 m/s ^2?
Tuesday, November 13, 2012 at 11:34pm by tionne

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