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July 10, 2014

Search: a girl of mass 40kg is skating at a constant speed of 1 m/s.suppose she doubles her speed,what will be the change in her kinetic energy?

Number of results: 23,092

Physics
A boy throws a 4-kg pumpkin at 8m/s to a 40kg girl on roller skates, who catches it. At what speed does the girl then move backwards?
December 31, 2009 by Aly

Physics
a 40kg girl and a 30kg boy face each other on friction free roller skates. the boy pushes the girl,
May 19, 2014 by Leah

Science
Im having trouble identifying forces. I have pictures of things like a man parachuting and a girl skating. I have to draw arrows to show the direction of the force and label to say the forces acting on each object. Parachuter has force of gravity pushing down while wind ...
March 11, 2007 by Laura

physics
a girl of mass 40 kg is skating at a constant speed of 1 m/s. supposed she doubles her speed, what will be the change in her kinetic energy?
January 25, 2011 by Anonymous

Physics - Another Question
"Two girls, one of mass 40kg and the other of mass 60kg, are standing side by side in the middle of a frozen pond. One pushes the other with a force of 360N for 0.10s. The ice is essentially frictionless. What is each girl's acceleration?"
July 12, 2010 by Stuck

physics
a girl of mass 40 kg is skating at a constant speed of 1 m/s. supposed she doubles her speed, how much work will be needed to double her speed?
January 7, 2013 by merlyn

physics
a 40kg girl climbs a vertical ladder at .5 m/s. what is her power output?
November 7, 2011 by jill

Physics
A 65kg boy and his 40kg sister, both wearing roller blades, face each other at rest. The girl pushes the boy hard, sending him backwards with a velocity of 2.9m/s towards the west. Ignore friction. What is the minimum amount of chemical energy is converted into mechanical ...
April 7, 2011 by Hadeel

math
Members of the Campus Roller Rink pay a yearly membership fee of $50 plus $5 each time they go skating. nonmembers pay $10 each time the go skating. How many times would both members and nonmembers have to go skating in a year in order to pay the same amount?
November 7, 2013 by jill

physics
A 38 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 16 m apart bu connected by a rope of negligible mass. The girl exerts a horozontal 4.7 force on the rope. (a) What is the acceleration of the girl? m/s2 (b) What is the acceleration of the sled? m/s2...
December 11, 2008 by johnny

physics
In a skating stunt known as "crack-the-whip," a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 69.0 kg and is 5.50 m from the pivot. He ...
February 23, 2011 by heather

Physics
In a skating stunt known as "crack-the-whip," a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 73.0 kg and is 7.70 m from the pivot. He ...
March 15, 2011 by Kara

physics
In a skating stunt known as crack-the-whip, a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 80.0 kg and is 5.35 m from the pivot. He is...
November 6, 2012 by Anonymous

Physics
Jack and Jill are skating. Jill has a mass of 50 kg, Jack has a mass of 80 kg. At t=0 seconds Jill starts skating across a 50 m diameter rink at a speed of 3 m/s. After 3 seconds Jack skates after her with a speed of 5 m/s. When they meet, Jack scoops up Jill and they glide to...
May 13, 2013 by Hale

physics
A girls sits on a tire that is attached to an overhanging tree limb by a rope. The girl's father pushes her so that her centripetal acceleartion is 3.8 m/s2. If the length of the rope is 3.3 m, a) what is the girl's tangential speed? b) If the magnitude of the force that ...
November 18, 2010 by Devon

English
1. The girl is aged 13. 2. The girl is 13. 3. The girl is 13 years old. 4. The girl is at the age of 13. 5. the girl is at age 13. (Are they all grammatical and the same? Is #1 correct?)
October 7, 2010 by rfvv

PHYSICS 1 ..'''''''''''''''''''''''' helllpppppppp
A girl of mass (Mg) is standing on a plank of mass (Mp). Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity (vgp) to the right relative to the plank. (The subscript gp ...
February 26, 2013 by Rrjey

SOCIAL THINGS!!!!!!!!!!!!!
is ice skating a sport and what team are the names for ice skating?
January 5, 2012 by Kaely

title making
whatis a good inline skating title for something that is aimed at promoting in line skating and incourage skaters to practice safe skating thanks so much this is due tomorrow and i have dinner soon, plz hurry and i thank you soooo much! Skate Safe and Sound How about? Inside ...
November 3, 2006 by Cass

Physics
Three children are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board 6.0 long . Two playmates are already on either end. Boy A has a mass of 50 , and girl B a mass of 35 . Where should girl C, whose mass is...
November 18, 2010 by Kyla

physics
a body of mass 40kg walk to a step in 40. find the kinetic energy
June 18, 2014 by godwin

science
a young girl with a mass of 46 kg is hanging motionless from a tree branch. what is the net force on the girl
December 5, 2010 by grayson

Math
A skating rink plays different songs during a two-hour skating party. The songs average 3 minutes each. There is a 15-minute break, without music, when the refreshments are served. How many songs do they need to have ready? For me will be 35 songs, it's that correct?
February 18, 2010 by Mia

physics
a ring rotates ar 30rad/s and has a radius of 3m and a mass 0f 100kg. If a disk(mass=40kg and with a radius of 4m) is dropped on the ring so the centers are aligned, what will be the resulting rotational speed of the ring-disc combination?
June 29, 2010 by jason

algebra
A skating rink manager finds that revenue R based on an hourly fee F for skating is represented by the function R= -480(F - 3.25)^2 + 5070. What hourly fee will produce maximum revenue?
January 8, 2014 by Emily

Physics
A mass of 60kg is on the edge of a plank. The Plank is 25 m long. There is a wedge 10 m from the 60 kg. Where would you position a 40kg so the plank would not rotate? If you placed the 40 kg at the end, where would you put a 10 kg mass to keep it balanced?
June 25, 2012 by Terry

Physics
A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2.
February 26, 2012 by Igbekele

Physics
A boy whose mass is 40kg runs up a flight of 30 steps each 150mm high in 6seconds. Find the average power developed (take g as 10m/s^2).
February 26, 2012 by Igbekele

Physics
A girl having mass of 35 KG sits on a trolley of mass 5 KG. The trolley is given an initial velocity of 4 m/s by applying a force. The trolley comes to rest after travelling a distance of 16 m. (i) How much work is done on the trolley? (ii) How much work is done by the girl?
December 21, 2010 by Harshid

MATH
Richard invited 6 friends to go skating. Of those 6 friends, there are twice as many boys as girls. How many girls were invited to go skating? A. 1 B. 2 C. 3 D. 4 I DON'T WANT MS.SUE TO HELP ME.
February 25, 2012 by math

Phisics
An elastic cord vibrates with a frequency of 3.5Hz when a mass of 0.62kg is hung from it.What is its frequency if only 0.40kg hangs from it?
November 26, 2013 by Daniela

Physics
Some kid (mass 20 kg) jumps with a velocity of 3.2 m/s horizontally off some steps (height 0.55 m) onto his heavy duty skateboard (mass 3 kg, height 0.03 m), which is initially at rest. How fast will he be skating?
October 22, 2010 by Sam

English
In which sentence are the conjunctions used correctly? 1. Either Fred nor Jon knew about the accident. 2. The top award was given neither to Steve or Jim. 3. Neither beauty nor popularity was considered in the contest. 4. Mary enjoyed neither roller skating or ice skating.
November 9, 2007 by Anonymous

english
In which sentence are the conjunctions used correctly? A. The top award was given to neither Steve or Jim. B. Either Fred nor John knew about the accident. C. Mary enjoyed neither roller skating or ice skating. D. Neither beauty nor popularity was considered in the contest. I ...
March 21, 2014 by Kelsy

English
In which sentence are the conjunctions used correctly? A. Either Fred nor John knew about the accident. B. The top award was given to neither Steve or Jim. C. Neither beauty nor popularity was considered in the contest. D. Mary enjoyed neither roller skating or ice skating. i...
April 4, 2014 by NightShade

College Physics
Some kid (mass 20 kg) jumps with a velocity of 3.2 m/s horizontally off some steps (height 0.55 m) onto his heavy duty skateboard (mass 3 kg, height 0.03 m), which is initially at rest. How fast will he be skating? I don't where to start.
October 16, 2010 by Sam

Math
Please help! Suppose one girl saves $10 every week. Another girl already has $21 and saves $3 every week. Write and solve an equation to determine when the two girls will have the saved the same amount of money. So far I have these expression for each girl: one girl has 10w ...
December 17, 2007 by Plse Help

MATHS
A three-tonne truck is allowed to have a gross mass (when fully loaded) of 7.5 tonnes. If it is carrying 0.5t of sand, 1.25t of brick and 4 bags of cement each weighing 40kg, what is the maximum extra mass which can still be placed on the truck before it is over-loaded? My ...
January 21, 2010 by DONNA

physics
two boys paul mass 60kg and john mass 40kg are standing on skateboards. They place their hands against each other and push away from each other so that they start to move in opposite direction. (a) if paul moves to the left with velocity of 0.8m/s.. Calculate john's velocity
April 18, 2012 by lebohang

English
In which sentence are the "conjunctions" used correctly? 1) Either Fred nor John knew about the accident. 2) The top award was given to neither Steve or Jim. 3 Neither beauty nor popularity was considered in the contest. 4) Mary enjoyed neither rooler skating or ice skating. I...
November 30, 2007 by Sarah

Physics
A 60 kg girl on a swing is pulled 1.5 meters back and then released. The girl oscillates at pi/3 radians per second. How far from equilibrium will the girl be in 4 seconds into the motion? How fast will she be moving at this location?
March 18, 2014 by Sounders

physics
the wooden crate in the figure below has a mass of 40kg. How much horizontal force is needed to A. start it moving B. to keep it moving along the wood floor at a constant speed
October 19, 2009 by kheith

chemistry
A cube of gold has a side length .050m. The mass of the cube is 2.40kg. What is the density of gold in g/cm cubed?
October 13, 2011 by caitlyn

force
A girl on roller skates accelerates at a rate of 2m/s2 with a force of 100N. is her mass F=ma m is mass in kg a is acceleration in m/s^2 F is in Newtons solve for m. A girl on roller skates accelerates at a rate of 2m/s2 with a force of 100N. what is her mass is when somthinh ...
October 23, 2006 by vincent

English
1. I don't know how to inline skate. 2. He is good at inline skating. 3. Do you like inline skating? 4. I made him inline/in-line skate. (Are they all grammatical? Why does it have 'inline'? What about 'in-line'? Are both expressions grammatical?)
December 6, 2009 by rfvv

Physics
a space-satellite mass of 600kg fires a rocket engine for 2 seconds expelling 40kg of exhaust gases at 350m/s. By how much will the speed of the capsule change? You may consider the initial relative velocities to be zero, but would it matter?
April 26, 2012 by Sarah

physics
A 38.3 kg girl and a 55.4 kg boy are on the surface of a frozen lake, 10.0 m apart. Using a rope, the girl exerts a horizontal 5.50 N force on the boy, pulling him toward her. Calculate the magnitude of the girl's acceleration.
February 28, 2012 by meyer

physics
A 38.5 kg girl and a 57.0 kg boy are on the surface of a frozen lake, 10.0 m apart. Using a rope, the girl exerts a horizontal 5.55 N force on the boy, pulling him toward her. Calculate the magnitude of the girl's acceleration
October 4, 2012 by kay

physics
A girl 36 kg occupies a seat of a swing that this subject by two chains 20 m in length each. If someone drops the girl from an 8 m position below the highest of the swing. What strength exercises it on the girl when she passes through the point lower?
November 10, 2010 by paul

physics
A girl 36 kg occupies a seat of a swing that this subject by two chains 20 m in length each. If someone drops the girl from an 8 m position below the highest of the swing. What strength exercises it on the girl when she passes through the point lower?
November 10, 2010 by paul

Physical Science
A 30 kg girl and a 25 kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girl speed is _______ m/s?
March 20, 2009 by Donna

physical science
a 30 kg girl and a 25 kg boy face each other on friction-free roller blades.the girl pushes the boy,who moves away at a speed of 1.0 m/s.the girl,s speed is _ m/s.
May 4, 2012 by Anonymous

physical science
a 30 kg girl and a 25 kg boy face each other on friction-free roller blades.the girl pushes the boy,who moves away at a speed of 1.0 m/s.the girl,s speed is _ m/s.
May 4, 2012 by Anonymous

fundamentals
A playground has its highest point 2.2m above the lowest point, and the slide is 4.9m long. If the average resistance to motion is one-fifth of the weight of the child(mass 40kg), find the speed at which the child reaches the bottom show working?
June 5, 2013 by David

math
in a family with two children, what are the probabilities of two boys, the first is a girl the second is a boy, neither is a girl, at least one girl, assuming that the birth of boys and girls is equally likely.
December 9, 2009 by Justin

Physics
A woman stands at the center of a platform. The woman and the platform rotate with an angular speed of 4.00 rad/s. Friction is negligible. Her arms are outstreched, and she is holding a dumbbell in each hand. In this position the total moment of inertia of the rotating system...
March 21, 2007 by CJ

Science
a 55 kh boy and 40 kg girl usa a rope while engaged in a tug-of-war on an icy frictionless surface. If the girl accelerates towards the boy at 5.1 m/s/s, what is the acceleration of the boy towards the girl. Thank You Did I not set this up for you last nite? What is it you do...
December 30, 2006 by leafprincess

Physics
1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it? 2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the ...
October 5, 2007 by Lee

Math
In a family with two children, what are the probabilities of the following outcomes, assuming that the birth of boys and girls is equally likely? a. Both are boys.b. The first is a girl and the second a boy. c. Neither is a girl. d. At least one is a girl. I am questioning ...
November 4, 2009 by Anonymous

English
1. They are skating in an ice rink. 2. They are skating at an ice rink. 3. They are skating on an ice rink. (Which one is correct?) 4. We are going to ski at a ski resort. 5. we are going to ski at Yongpyeong Ski Resort. 6. We are going to ski on a mountain. 7. We are going to...
August 30, 2012 by rfvv

engineering
a boy of mass 40kg is sliding down the spiral slide at a constant speed such that his position is measured by theta=(0.7t) rad and z=(-0.5t) m where t is in seconds. How do you find the components of forces Fr, Ftheta and Fz which the slide exerts on teh boy at the instant ...
November 15, 2008 by sarah

English
1. The boy is arm wrestling the girl. 2. The boy is arem wrestling with the girl. 3. The boy is having an arm wrestle with the girl. 4. The boy is having an arm wrestling against the girl. 5. The boy is doing an arm wrestle with the girl. 6. The boy is doing an arm wrestling ...
May 29, 2012 by rfvv

Fractions
Last night 16/28 of the tenth grade girls and 19/30 of the tenth grade boys went to go ice skating. Did a greater fraction of tenth grade girls or boys went ice skating? Prove it.
March 26, 2014 by Dave

Physics
For the first part of this question I got 12.12m/s B. With the help of a friend the boy measures the height to which the ball returns and finds it to be 5.2 meters. How fast was the ball moving when it left the ground? I wrote this down mass of ball: 0.40kg height if house: 7....
October 23, 2012 by Josh

PreAP Physics
Pam has a mass of 40Kg and she is at rest on smooth, level, frictionless ice. Pam Straps on a rocket pack. The rocket supplies a constant force for 22m and Pam acquires a speed of 62 m/s. A) What is the magnitude of the force? B) What is Pam's final Kinetic Energy?
November 30, 2011 by Mandy

Physics -URGENT-
A 55 kg boy and a 37 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.4 m/s^2, determine the magnitude of the acceleration of the boy toward the girl in m/s^2
October 6, 2013 by Natalie

physics
Suppose a 65-kg boy and a 45-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
October 28, 2009 by Liz

Physics
Suppose a 68-kg boy and a 40-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s^2, find the magnitude of the acceleration of the boy toward the girl.
January 3, 2010 by Sasha

Physics
Suppose a 68-kg boy and a 40-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
January 5, 2010 by Sasha

physics
Suppose a 64-kg boy and a 49-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
June 10, 2010 by Anonymous

science
A 63 kg boy and a 44 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.7 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl
September 12, 2011 by jasmine

physics6
A 64-kg boy and a 42-kg girl use an elastic rope while engaged in a tug-of-war on an icy frictionless surface. If the acceleration of the girl toward the boy is 3.5 m/s2, determine the magnitude of the acceleration of the boy toward the girl.
December 11, 2011 by Hannah

PHYSICS
55 kg boy and a 37 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.4 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl in m/s^2
October 6, 2013 by Natalie

physic
A 57 kg boy and a 42 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.4 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in units of m/s2.
September 22, 2010 by Wendia

Physics
A 57 kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.5 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in units of m/s2
October 14, 2012 by Jessica

physics
A 58 kg boy and a 38 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.1 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl. Answer in units of m/s 2
September 13, 2013 by Shareka

Math
In a family with two children, what are the probabilities of the following outcomes, assuming that the birth of boys and girls is equally likely? a. Both are boys. b. The first is a girl and the second a boy. c. Neither is a girl. d. At least one is a girl. I was wondering ...
November 18, 2009 by Punkie

AP CALCULUS
A girl is flying a kite at a height of 320 ft. If the wind blows the kite horizontally at a rate of 15 feet per second away from the girl, at what rate is the girl releasing the string when the length of the string is 400 ft? [kite] <---15 ft/sec . . . . . . . . . . . . 320...
November 6, 2010 by Naz

Physics
A child riding a bicycle has a total mass of 40kg. The child approaches the top of a hill that is 10m high and 100m long at 5m/s. If the force of friction between the bicycle and the hill is 20N, what is the child's velocity at the bottom of the hill? (Assume no air resistance...
November 15, 2009 by Monique

English
e.g. Who is the girl with glasses? 1. Who is the girl holding glasses? 2. Who is the girl wearing glasses? (What does e.g. mean? #1 or #2?)
March 13, 2013 by rfvv

physics
if a train is travelling with a speed equal to light and a girl is running inside it in the way the train is running.an observer see the girl from outside running.what is the speed of the girl AND WHY??
June 25, 2012 by mukul bawa

physics
a girl lifts a 100 N load a height of 2.0 m in a time of 0.5 s. what power does the girl produce?
December 15, 2010 by Anonymous

english
what is girl in this sentence Sarah is a very smart young girl with a bright future.
March 13, 2013 by John

Science
What is th weight on earth of a girl with a mass of 30 kg?
January 5, 2010 by Janise

physics
Two friends, Al and Jo, have a combined mass of 171 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart, because they are holding each other. When they ...
January 25, 2012 by Jen

english
what is girl in this sentence Sarah is a very smart young girl with a bright future. Is it a predicate nominative
March 13, 2013 by John

english
could you please tell me the distinction between small girl and smaller girl 2.aunt and aunty/auntie
November 21, 2013 by r s talagathoty

Physics
A block of mass m = 3.40kg and charge q = 1.50C is on an incline plane that makes an angle č = 33.0o with the horizon. An applied electric field is parallel with the incline as shown in the above diagram. What must the value of the applied electric field be to keep the block ...
January 17, 2013 by Tim

physical science
a 500-N girl has a mass of ? and a weight of ?
September 4, 2007 by tana

physics
What is the weight on earth of a girl with a mass of 30kg?
March 20, 2009 by danny

Physical Science
A boy throws a 4-kg pumpkin at 8 m/s to a 40-kg girl on roller skates, who catches it. At what speed does the girl then move backward?
September 11, 2011 by Help

Physical Science
A boy throws a 4-kg pumpkin at 8 m/s to a 40-kg girl on roller skates, who catches it. At what speed does the girl then move backward?
September 11, 2011 by Jason

alphabetizing
what comes first girls or girl's? girl
December 11, 2006 by brandon

English
Describe the girl in each picture. How does she look? She looks happy in the first picture. What about the girl in Picture 2? I think she looks angry or upset. Then what about the girl in the last picture? She looks surprised. Good job! (Would you check the passage above? Are ...
July 2, 2010 by rfvv

physics
A 45 kg boy is holding a 12 kg pumpkin while standing on ice skates on a smooth frozen pond. The boy tosses the pumpkin with a horizontal speed of 2.8 m/s towards a 37 kg girl who catches it. The girl is also wearing ice skates. What are the final speeds of the boy and the girl?
March 3, 2014 by Hal

physics
Two children float motionlessly in a space station. The 20-kg girl pushes on the 40-kg boy and he sails away at 1.0m/s. What happens to the girl?
October 11, 2011 by Anonymous

physics
A 39-kg girl standing at rest on slippery (frictionless) ice throws a 10-g ball forward with a speed of 10 m/s. Just afterward, the girl will
February 3, 2012 by Emily

physical science
How many joules of heat are required to melt 40kg of ice at o degrees celcius?
October 2, 2008 by Rosemary

Physcial science
How many joules of heat are required to melt 40kg of ice at 0 degrees celsious?
November 3, 2008 by Jordan

Physics
Ice-hockey star Wayne Gretzky is skating at 12.7 m/s toward a defender, who in turn is skating at 5.39 m/s toward Gretzky. Gretzky’s weight is 677 N; that of the defender is 869 N. Immediately after the collision, Gretzky is moving at 2.21 m/s in his original direction. You ...
March 13, 2008 by Charlie

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