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July 31, 2014

Search: A person lifts a 4.7 kg cement://wlo.bu20a vertical distance 1.4 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process

Number of results: 23,067

Physics
A person lifts a 5.2 kg cement block a vertical distance 1.2 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process.
January 9, 2012 by Mike

physics
A person lifts a 4.4 kg cement block a vertical distance of 1.30 m and then carries the block horizontally a distance of 13.50 m. (a) How much work is done by the person in the process?
November 9, 2011 by Anonymous

Khan
A person lifts a 4.3 kg cement block a vertical distance of 1.3 m and then carries the block horizontally a distance of 5.3 m. The acceleration of gravity is 9.81 m/s 2 . a) Determine the work done by the person in the process. Answer in units of J
November 15, 2011 by Hajib

physics problem that i neeeed help with!
A person lifts a 3.8 kg cement block a vertical distance 0.9 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process. ? J (by person) ? J (by force of gravity)
April 15, 2010 by brittany

physics
A person lifts a 5.5 kg cement block a vertical distance 1.1 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process. J (by person) J (by force of gravity)
January 3, 2011 by Anonymous

Begley
A person lifts a 4.1 kg cement block a vertical distance of 0.79 m and then carries the block horizontally a distance of 13.30 m. (a) How much work is done by the person in the process? (b) How much work is done by gravity in the process?
February 29, 2012 by Bryson

physics
A person lifts a 4.6 kg cement block a vertical distance of 1.43 m and then carries the block horizontally a distance of 10.50 m. (a) How much work is done by the person in the process? (b) How much work is done by gravity in the process?
January 26, 2013 by Jayde Larson

physics
a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?
January 14, 2013 by Kalynn

physics
a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?
January 14, 2013 by Kalynn

Math
A contractor requires a cement mix that is 70% sand and 30% cement. He has 700 kg of a cement mix that is 80% sand and 20% cement. How much cement should he add so that he gets the required mix? My set up: required mix = (S)(.7) + (C)(3) 700kg = (S)(.8) + (C+X)(.2) Is this ...
August 25, 2011 by Kyle

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...
February 28, 2011 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...
November 4, 2013 by Anonymous

Science
An elevator lifts a person weighing 625 newtons a distance of 7 meters. If the elevator uses 875 watts of power to lift the person, how long does it take?
October 4, 2012 by Anonymous

Physics
A rescue helicopter lifts a 65 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 13 m. (a) What is the tension in the cable? N (b) How much work is done by the tension in the cable? J (c...
October 14, 2008 by Brandon

Physics
A rescue helicopter lifts a 65 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 13 m. (a) What is the tension in the cable? N (b) How much work is done by the tension in the cable? J (c...
October 15, 2008 by Brandon

Physics
A rescue helicopter lifts a 65 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 13 m. (a) What is the tension in the cable? N (b) How much work is done by the tension in the cable? J (c...
October 29, 2008 by Brandon

physics
An athlete whose mass is 94.0 is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 600 . He lifts the barbell a distance of 0.50 in a time of 2.2 . Part A Use Newton's laws to find the total force ...
November 9, 2012 by Anonymous

physics
A crane slowly lifts a cement slab weighing 2,500 N to a height of 12 m. The slab is accidentally dropped. What is its KE as it hits the ground?
May 5, 2014 by Anonymous

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 ...
February 26, 2013 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 ...
November 4, 2013 by Anonymous

physics
During a workout, a person repeatedly lifts a 13 lb barbell through a distance of 1.5 ft. How many "reps" of this lift are required to burn off 100 Cal?
November 22, 2008 by lizia

Physics - thermal mechanical
During a workout, a person repeatedly lifts a 13 lb barbell through a distance of 1.5 ft. How many "reps" of this lift are required to burn off 100 Cal?
April 29, 2011 by Erica L

physics
An athlete whose mass is 94.0 is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 600 . He lifts the barbell a distance of 0.50 in a time of 2.2 .
November 9, 2012 by Anonymous

physics
a weightlifter lifts a set of weights a vertical distance of 2.36. if a constant net force of 335 N is exerted on the weights how much net work is done on the weights?
March 9, 2012 by Nikki

physics
A weight lifter lifts a set of weights a vertical distance of 2.07 m. If a constant net force of 335 N is exerted on the weights, how much net work is done on the weights? Answer in units of J
January 17, 2014 by Erin

Math
A contractor has been asked to pave 15 miles of new road. Before he can set his price, he needs to know how much the cement will cost. If the road is 45 feet wide and 9 inches thick and the cost of cement is $35 per cubic yard, what will be the cost of the cement needed for ...
May 2, 2013 by Suzy

Physics
A person, standing on a vertical cliff a height h above a lake, wants to jump into the lake but notices a rock just at the surface level with its furthest edge a distance s from the bottom of the cliff. The person realizes that with a running start it will be possible to just ...
September 22, 2013 by ss01

math((PLEASE HELP!))
A contractor has been asked to pave 15 miles of new road. Before he can set his price, he needs to know how much the cement will cost. If the road is 45 feet wide and 9 inches thick and the cost of cement is $35 per cubic yard, what will be the cost of the cement needed for ...
May 2, 2013 by Suzy

physics
A person of mass 84.5 kg is initially at rest on the edge of a large stationary platform of mass 150 kg, supported by frictionless wheels on a horizontal surface. The person jumps off the platform, traveling a horizontal distance of 1.00 m while falling a vertical distance of ...
February 24, 2012 by John

Cement quarry application
In general, Portland cement is the main production of cement industry. Portland cement is kind of meticulous powder, usually gray, which consists of calcium (from limestone), silicate, aluminate (clay) and ferrite. Limestone is the main raw material of cement production; most ...
July 22, 2012 by jiandan

physics-torque
A person is doing leg lifts with 3.0-kg ankle weights. She is sitting in a chair with her legs bent at a right angle initially. The quadriceps muscles are attached to the patella via a tendon; the patella is connected to the tibia by the patellar tendon, which attaches to ...
January 19, 2011 by Trace

Physics
container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
July 18, 2012 by Rob

Physics
container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
July 18, 2012 by Rob

Science
container factory uses a 450 W motor to operate a conveyor belt that lifts containers from one floor to another. To lift 250 1-kg containers a vertical distance of 2.4 m, the motor runs for 45 s. What is the efficiency of the motorized conveyor system?
July 18, 2012 by Jack Hill

geometry
Find the weight to the nearest kg, of the cement block. Cement weighs 1700 kg/m3. 12cm x 10cm and 40cm x 20 cm x 20cm.
April 20, 2013 by Dee

physics
two people carry a heavy electric motor by placing it on a light board 2m long.one person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 400N.Calculate the weight of the motor and determine where its center of Gravity is Located
April 28, 2013 by Anonymous

physics
two people carry a heavy electric motor by placing it on a light board 2m long.one person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 400N.Calculate the weight of the motor and determine where its center of Gravity is Located
April 28, 2013 by Anonymous

physics
two people carry a heavy electric motor by placing it on a light board 2m long.one person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 400N.Calculate the weight of the motor and determine where its center of Gravity is Located
April 28, 2013 by Anonymous

physics
Two people carry a heavy electric motor by placing it on a light board 2.00 m long. One person lifts at one end with a force of 400.0 N, and the other lifts at the opposite end with a force of 600.0 N. What is the weight of the motor? and where along the board is the center of...
November 9, 2009 by Student1

Math,Ratio
mr kim mixes cement&sand to make a mixture.he uses 2 pails of cement for every 5 pails of sand. a) if he uses 24 pails of cement,how many pails of sand does he use? b) if he uses 35 pails of sand,how many pails of cement does he use?
December 28, 2011 by Da S

physics
A person uses a lever to lift a load. The person pushes downward with a force of 17 N a vertical distance of 1.8 m. Under ideal condidtions (no friction, bending, etc.), how high up can a load weighing 610 N be lifted? h(lift)=_____cm
February 20, 2011 by anonymous

maths
The relationship between the vertical height and the horizontal distance of a ball thrown at 45 degree is given by the equation y = x - x^2/50, where y is the vertical height and x is the horizontal distance. (a) Find the maximum vertical height reached. (b) Find the ...
September 1, 2013 by Shane

Phyics
A 715N person walks up three flights of stairs, covering a total vertical distance of 10.5(a)If as typical, only 20% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use
December 3, 2010 by Anonymous

Physics
How much work is done pushing a wheel barrow full of cement 5.3m forward if a force of 500N is applied 20 degrees from the vertical?
April 11, 2013 by Ted

Maths
Sam used cement and sand to prepare a mixture. The ratio of the number of pails of cement used to the number of pails of sand used was 1:2. Sam then added 8 more pails of cement and the ratio became 5:2. A.) How many pails of cement was used at first? B.) How many pails of ...
September 30, 2012 by Zayn

physics
a 715 N person walks up three flights of stairs, covering a total vertical distance of 10.5 m. (a) If, as is typical, only 20% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use? (1 food calorie=4186J)
October 25, 2009 by physics student

5th grade math
bill is replacing the grass in his yard with cement .the yard is 300m long and 100m wide. if cement is 15cents per cm how much would it cost?
March 12, 2013 by kit

physics
A 735 N person walks up three flights of stairs, covering a total vertical distance of 10.0 m. If, as is typical, only 20.0% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use? (One food calorie 4186...
June 12, 2011 by Student B

Math
Because of the Earth’s curvature, a person can see a limited distance to the horizon. The higher the location of the person, the farther the person can see. The distance D in miles to the horizon can be estimated by D(h)=1.22√h, where h is the height of the person above ...
November 25, 2011 by Joe

Physics
In starting an exercise, a 1.60-m tall person lifts a 2.10 kg book from the the ground so it is 2.20m above the ground. What is the potential energy of the book relative to (a) the ground,and(b) the top of the persons head? (c) What is the work done by the person in part(a)?
December 7, 2011 by Amanda and Leah

CHEMISTRY
The chemical and engineering properties of cement are very important in the construction industries. One of the four principle chemical compounds in Portland cement in tricalcium silicate, 3CaO.SiO2. Calculate its molecular/formula weight?
April 5, 2011 by Taynell

math
How many cement blocks are needed to construct a wall 0.5 ft. thick, 6 ft. high, and 60 ft. long if it takes 10 standard cement blocks to make 1 cubic foot of wall?
June 14, 2012 by James

Consumer Math
How many cement blocks are needed to construct a wall 0.5 ft. thick, 6 ft. high, and 60 ft. long if it takes 10 standard cement blocks to make 1 cubic foot of wall?
July 11, 2013 by Athena

math
Jen and jacob want to put a cement deck around their pool. if the cement cost $4.75 per square foot, how much is the cost of the deck? round to the nearest hundreth.
May 7, 2014 by Anonymous

physics
A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift is performed in three stages, each requiring a vertical distance of 7.70 m: (a) the initially stationary spelunker is accelerated to a speed of 3.80 m...
February 13, 2008 by dawn

Math
What is the dollar amount for the cement needed for a sidewald that is 4 inches thick, 3 feet wilde, and 40 feet long if the cement is sold for $76 petr cubic yard. Calculate the problem using fractions to avoid rounding errors caused by repeating decimals.
May 6, 2013 by Alice

engineering
Hello guys.I got a homework and seem like I am stocked. a)What type of experiments should be done to find the relationship between the strength of concrete and water/cement ratio. b)what will be the range of the water/cement ratio? It would be great if you help.Thank you!
May 4, 2014 by Elena

science
a libraian lifts a box of books that weighs 93 N a distance of 1.5 m. How much work does he do?
November 16, 2009 by sophie

Physical Science 2nd Semester
A student lifts a backpack with a force of 50 Newtons. She lifts the backpack 2 meters off the floor. Calculate the work that she has done.
May 24, 2011 by chris

Physics
A cable lifts a 1060-kg elevator at a constant velocity for a distance of 39 m. What is the work done by each of the following?
November 11, 2012 by Donald

Physics
A cable lifts a 1060-kg elevator at a constant velocity for a distance of 39 m. What is the work done by each of the following?
November 12, 2012 by Don

physics
an elevator lifts 4 person each with an average mass of 72 kg to a height of of 20 metre in one minute calculate 1 the work done by the lift and 2 the power exerted
October 22, 2010 by kashib

physics
A skateboarder is approaching a set of stairs at a speed of 8 m/s. The stairs drop a vertical distance of h=3 meters and take up a horizontal distance d=5 meters. As the skater reaches the edge she can give herself a vertical component of velocity by jumping. Note: this does ...
September 16, 2007 by jo

Physics
If a person lifts a 21.9 kg bucket very slowly from a well and does 8.3 kJ of work on the bucket, how deep is the well?
December 7, 2013 by Nicole

Surveying
I am looking for horizontal distance between 2 points. My slope distance is 153.97' and a vertical distance of 91degrees 32minutes 45seconds.
September 21, 2013 by Dean

math
cycling time distance for Joe mario melanie 0 0 0 0 1 5 7 9 2 10 14 18 3 15 21 27 Find the distance each person travels during the first 3 hours. Explain. And find the distance each person travels in 7 hours. THANK YOU
August 28, 2007 by Nathan

Physics
A vehicle travelling 30mph collides head-on with another vehicle travelling 50mph, the force of impact, theoretically, would be the same as a vehicle travelling: A. 80mph hitting a cement wall B. 80mph hitting a stopped vehicle c. 50mph hitting a cement wall d. 30mph hitting a...
August 4, 2011 by Alisa

maths
Let the bottom edge of a rectangular mirror on a vertical wall be parallel to and h feet above the level floor. If a person with eyes t feet above the floor is standing direct at a distance d feet from the mirror, what is the relationship among h,d and t if the person can just...
March 23, 2013 by black_widow

physics
A 35-kg child starting from rest slides down a water slide with a vertical height of 20 m. What is the child’s speed a.)half-way down the slide’s vertical distance b.) three-fourths the distance (ignoring friction)
September 16, 2010 by Crista

physical science
Sarah lifts a 345 g shopping bag a distance of 1.2 meters onto a shelf. How much work was done?
April 12, 2012 by Katie

Alegbra
Jen and Jacob want to put a cement deck around their pool. Use the figure below to calculate the area of the deck. If cement costs $4.75 per square foot, how much is the cost of the deck? Round to the nearest hundredth. Width of pool is x+3 Length of pool is 3x-4 Width of deck...
March 12, 2014 by WillyB

perimeter and area
A rectangular field is 13 m long and 10 m wide. its has a cement path 3 1/2 m wide around it. What is the area of the cement path?
January 7, 2013 by FH

Algebra
A batch of concrete is made by mixing 1 part cement, 2.5 parts sand, and 3.5 parts gravel. How many pounds of sand and gravel are needed to make 300 pounds of cement?
September 22, 2010 by Kimmie

algebra 2
suppose you have an outdoor pool measuring 25ft by 10ft. you want to add a cement walkway around the pool. if the walkway will be 1ft thick and you have 304ft of cement how wide should the walkway be? write the quadratic equation to model the volume of the walkway
December 14, 2010 by arianna

physics
A mechanic lifts the front of a car with a jack. Find the mechanical advantage if a force of 30.0 lb on the jack handle lifts the car that weighs 960 lb
May 20, 2013 by help ASAP

physics
in which of the following is the most work being done by roy and which example roy doing no work? a)roy lifts a 5kg radio up 1 meter b) roy holds a 5 kg radio at a height of 1meter for 3 hours. c)roy lifts a 10 kg TV up 1 meter d)roy lifts a 10 kg TV up 2 meters. e) roy drops ...
May 31, 2012 by lisa

physics
A person lifts a 199 Newton stack of books 12 meters high in 7 seconds. How much power is used to lift the books?
January 29, 2012 by christy

Physics
A man lifts a 21.1 kg bucket from a well and does 3.1 kJ of work. How deep is the well? Assume that the man lifts the bucket at constant speed. Answer in units of m. I am not sure if I did this right: (mg)(d)= Wnet (21.1 kg)(9.81)(d)= 3100J d= 14.98 meters
March 2, 2008 by Julia

Physics/Math
A person walks up a stalled 20 m long escalator in 79 s. When standing on the same escalator, now moving, the person is carried up in 60 s. How much time would it take that person to walk up the moving escalator? ratewalking= 20/79 ratemoving=20/60 time= distance/added rates ...
February 3, 2007 by winterWX

Physics
A personne walking at a speed of 1.7m/s see's a stoped bus 25m from him. At this moment this person starts to run with an acceleration of 1,3m/s2. After 4 secondes this personne has reached his maximum speed et it stays constant, but at the same time the bus starts moving and ...
March 22, 2007 by Nick

physics
A person stands in front of a mirror at an amusement park. the person is left of a mirror. the mirror shows an upright image of the person that seems to be 4.0 meters behind the mirror. assume the image is 3.5 times the person's height. a) is the image virtual or real ? ...
May 2, 2012 by deep

physics
two people push in opposite directions on a block that sits atop a frictionless surface. The soles of their shoes are glued to the surface. if the block originally at rest moves to the right a distance of d. Describe qualitatively how much work is done by the person on the ...
October 30, 2006 by joseph

Physics
A large store escalator that is designed to transfer customers to one floor to another, a vertical distance of 8.0m. It takes each person 20 seconds to ride from bottom to top of the escalator. Explain how you would determine the power of the escalator motor.
June 29, 2014 by Anonymous

Physics
An elevator lifts a total mass of 1.1 x 10^3 kg, a distance of 40 m in 12.5s. How much power does the elevator demonstrate?
December 4, 2012 by Taylor

biomechanics
When a weight-lifter lifts a weight equal to his upper body weight his trunk makes an angle of 40 degrees, with the vertical, as shown in the diagram below. In this position the erector spinae muscles exert a large force on the sacrum at an angle of 40 degree to the vertical ...
December 12, 2012 by dmkp

Physics
A cable lifts a 1200 kg elevator at a constant velocity for a distance of 34.5 m. What is the work done by the tension in the cable.
April 30, 2010 by Fallon

physics
A cheerleader lifts his 62.2 kg partner straight up off the ground a distance of 0.89 m before releasing her. The acceleration of gravity is 9.8 m/s 2 . If he does this 19 times, how much work has he done? Answer in units of J
September 27, 2012 by LYNN

physics
An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
June 11, 2012 by Akbar

Physics
An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
June 11, 2012 by Akbar

physics
An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
June 13, 2012 by Akbar

Physics
A crate of mass 59 kg is pushed across a level floor by a person. If the person exerts a force of 30 N in the horizontal direction and moves the crate a distance of 12 m, what is the work done by the person?
July 11, 2012 by Sierra

Calculus
A plane flying with a constant speed of 14 km/min passes over a ground radar station at an altitude of 7 km and climbs at an angle of 45 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 2 minutes later? I know you use law of ...
October 14, 2006 by Michael

Physics 1
A crate of mass 42 kg is pushed across a level floor by a person. If the person exerts a force of 20 N in the horizontal direction and moves the crate a distance of 11 m, what is the work done by the person? _____J
October 8, 2012 by John

Physics
You meet a person with prescription glasses of +0.55 dpt. What is the near point of this person? Express the result as a positive number! Hint: the near point of a healthy person is 25 cm. An object placed at this distance will form an image at the near point of the person.
March 28, 2010 by Sandra

applied physics
the work required to lift eleven 94.0lb bags of cement from the ground to the back of a truck is 4340ft lb. what is the distance from the ground to the bed of the truck?
April 22, 2013 by donna

physics
A hydraulic jack in a gas station lifts a 900kg car a distance of .25cm When a force of 150N pushes a piston through a distance of 20cm Find the IMA (book answer is 80) AMA (book answer is 59) Efficency (book answer is 74%) can you help, I have no idea how to begin to find ...
February 21, 2010 by corey

physics
An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
June 7, 2012 by Akbar

physics
3. A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is...
June 8, 2011 by Tim

physics
A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is ...
June 8, 2011 by Tim

science
A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is ...
June 8, 2011 by Anonymous

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