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July 29, 2014

Search: How much force does an 82.0 kg astronaut exert on his chair while sitting at rest on the launch pad

Number of results: 36,198

PHYSICS
A 41kg box is being pushed a distance of 7.0m across the floor by a force P whose magnitude is 158N. The force P is parallel to the displacement of the box. The coefficient of Kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on ...
February 24, 2007 by Cavin

drwls please read
i know this might seem kind of long. but if you could please help me, i'd greatly appreciate it. a. suppose you have a tug of war with a friend who is the same size and weight as you are. You both pull as hard as you can, but neither of you seems to be winning. You move a ...
October 25, 2008 by Tony

Physics
A .22 rifle bullet, traveling at 373m/s, strikes a block of soft wood, which it penetrates to a depth of 0.125m. The block of wood is clamped in place and doesn't move. The mass of the bullet is 1.90. Assume a constant retarding force.How much time is required for the bullet ...
February 8, 2010 by Anonymous

science
What is the net force of a 4.0N force and 8.0N force acting on an object in opposite directions?
November 6, 2010 by leisha

science
What is the net force of a 4.0N force and 8.0N force acting on an object in opposite directions?
November 6, 2010 by leisha

science
What is the net force of a 2.0N force and a 3.0N force acting on an object in the same directions?
November 7, 2010 by ced

science
What is the net force of a 2.0N force and a 3.0N force acting on an object in the same directions?
November 7, 2010 by ced

physics
1. There are three forces acting on an object, a 30N force pulling right, a 50N force pushing right, and 30N frictional force pushing left. a. What is the force of gravity on this 15kg object? b. If the object is on the ground what is the normal force acting on the object c. ...
June 21, 2011 by molly

Physics
A crate is pulled to the right with a force of 85.5 N, to the left with a force of 120.8 N, upward with a force of 652.1 N, and downward with a force of 249.5 N. What is the net external force in the x direction? Answer in units of N. What is the net external force in the y ...
January 10, 2011 by dmj697

Science--Physics--check answers
1. A football player pushes a dummy forwards at a constant 0.85m/s for 11m using 7150 J of energy. The dummy has a mass of 120 kg. Find the force the football player exerts, find the frictional force the dummy exerts. - for my answer I got 1176N as the force the football ...
February 3, 2014 by Diane

Physics
During 2004, japanese scientists successfully tested two solar sails. One had somewhat complicated shape that we shall model as a disk 9 m in diameter and 7.5 um thick. The intensity of solar energy at this location was about 1400 W/m ^2. (a) What force did the sun's light ...
March 31, 2008 by J

physicalscience
1. which one of the 4 keeps electrons in orbit around the nucleus? electromagnetic force weak force strong force gravity 2. which is the greatest of the 4 fources
November 3, 2007 by liz

physics
Discuss the relationship between motion and force including the following terms: velocity, acceleration, equilibrium, contact force, and field force.
May 9, 2013 by Adam

science
Discuss the relationship between motion and force including the following terms: velocity, acceleration, equilibrium, contact force, and field force.
May 9, 2013 by Adam

Physics
A hollow plastic spherical bobber of mass 0.005 kg and volume of 50 cm3 floats on the surface of a lake supporting a submersed fishhook and a bait with a combined mass of 0.01 kg and a combined volume of 2 cm3. The density of water is 0.001 kg/cm3. If a fish grabs the bait, ...
March 24, 2010 by Ellen

11th grade physics
Rachel pulls her 177N suitcase at a constant speed by pulling on a handle that makes an angle (-) with the horizontal. Using frictional force on the suitcase as 27N and Rachels force on 43N on the handle to calculate the net force. 1. What angle does the handle make with the ...
November 2, 2010 by Zack

physics
A 34-pound crate is pushed across the floor by a 30-pound horizontal force F1. Aside from the pushing force and gravity F2, there is also a 34-pound force F3 exerted upward on the crate and a 20-pound frictional force F4 What kinds of work do the force F1, F2, F3, F4 do, ...
November 16, 2011 by Mochool

Physics
A light spring having a force constat of 125 N/m is used to pull a 9.50kg sled on a horizontal frixtionless ice rink. If the sled has an acceleration of 2.00 m/s^2, by how much does the spring stretch if it pulls on the sled (a) horizontally, (b) at 30.0 degrees above the ...
June 15, 2009 by Sarah

Physics Help
A force sensor is used to measure a force applied to a 9.1 kg box on a hard, horizontal surface. It records that the box starts to move when the force is equal to 26.9 N. This force makes the box start to move with an acceleration of 0.2 m/s2. Find mu sub s/k respectively.
June 18, 2012 by Brittney

Physics-please check my work
Can you check my work please? true/false 1.) force is a scalar quantity: *FALSE 2.) the object on which a force acts is called the system: *TRUE 3.)The specific, indentifiable cause of a force is called the system: *FALSE 4.) A force can not exist without an agent and a system...
December 11, 2012 by Gavin

physics
When a 0.045 kg golf ball takes off after being hit, its speed is 35 m/s. A)How much work is done on the ball by the club? B)Assume that the force of the golf club acts parallel to the motion of the ball and that the club is in contact with the ball for a distance of 0.007 m. ...
April 18, 2010 by Will

Physics
The drawing shows a person (weight W = 592 N, L1 = 0.841 m, L2 = 0.410 m) doing push-ups. Find the normal force exerted by the floor on each hand and each foot, assuming that the person holds this position. force on each hand N force on each foot N I post this eailer and O'm ...
April 4, 2008 by Robinson

physics
A 5.0 kg book is sitting on a table. Which describes the force acting on the book a. there are no forces acting on the book b. the force of the table upward is greater than the force of gravity downward c. the net force on the book is zero d. kinetic energy counteracts the ...
February 26, 2010 by frank

classical physics
Question 14 Give reasons for the answers to each of the following questions: a) Can a normal force be horizontal? b) Can a normal force be directed vertically downward? c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can the normal force be ...
March 22, 2013 by Pritesh

Physics
How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?
January 6, 2011 by Maya

Physics
How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?
January 6, 2011 by Maya

science
A 30 kg satellite and a 2,000 kg meteorite are 21 m away from each other. How much force exists between them?
February 4, 2011 by Kay

science
A box of groceries requires 5.0 newtons of force to lift it up 1.0 meter. How much work is done?
May 26, 2011 by yo

Science
How much work does the hiker do if he uses 800 n of force to walk 100 meters?
November 3, 2011 by jill

physics
how much force can be applied to the top block without the blocks slipping apart
March 4, 2012 by Anonymous

physics
how much force can be applied to the top block without the blocks slipping apart
March 4, 2012 by Anonymous

physics
How much work does a student do if he throws a 0.750 kg ball with force of 45.0 N through a distance of 1.50 m?
November 6, 2013 by naya

physics
How much force is needed to accelerate a 50kg rider and his 250kg motorcycle at 4m/s27
July 6, 2014 by kei

science
1.act against the direction of motion and gets larger as an object moves faster 2. an object acted upon by a net force will accelerate in the direction of that force. 3.the speed an object reaches when the force of gravity is balanced by the force of air resistance
September 21, 2008 by karen

science
1.act against the direction of motion and gets larger as an object moves faster 2. an object acted upon by a net force will accelerate in the direction of that force. 3.the speed an object reaches when the force of gravity is balanced by the force of air resistance
September 21, 2008 by karen

physical science
during a football game two players try to tackle another player.one player applies a force of 50.0 n to the east. a second player applies a force of 120.0 n to the north . what is the total applied force?and what is themagnitude and direction of the force
October 11, 2011 by sarah arcand

Physics
What is the apparent weight of a 75 KG astronaut 4200 km from the center of the earth's moon in a space vehicle.a) moving at constant velocity, and b) accelerating toward the moon at 209 m/s? state the direction in eachcase
March 3, 2010 by Vim

physics
an astronaut rotates at the end of a tesr machine whose arm has a length of 10.0m. if the acceleration she experiences must not exceed 5g (g=10m/s^2? what is the maximum number of revolutions per minute of the arm?
November 8, 2010 by katy

physics
an astronaut rotates at the end of a test machine whose arm has a length of 10.0m. if the acceleration she experiences must not exceed 5g (g=10m/s^2? what is the maximum number of revolutions per minute of the arm?
November 8, 2010 by katy

physics
an astronaut rotates at the end of a test machine whose arm has a length of 10.0m. if the acceleration she experiences must not exceed 5g (g=10m/s^2? what is the maximum number of revolutions per minute of the arm?
November 8, 2010 by katy

physics
Im trying to study for my physics exam by doing some extra problems, however im stuck with this one. any help is much appreciated Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 4.62 x 10-6 kg. The gravitational force ...
September 28, 2012 by John

Physics/Calculus
It takes a force of 21,714lb to compress a coil spring assembly on a New York City Transit Authority subway car from its height of 8in to its fully compressed height of 5in. A. What is the assemblys force constant? B. How much work does it take to compress the assembly the ...
May 2, 2014 by Tim

Physics
A force of 3.00 N acts through a distance of 12m in the direction of the force.Find the work done. Work=force*distance*CosTheta where theta is the angle between force and distance.
September 16, 2006 by fluffy

Physics
A 7.80-g bullet moving at 530 m/s penetrates a tree trunk to a depth of 6.2 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. (b) Assuming the friction force is constant, determine how much time elapses between the moment ...
May 3, 2011 by Dani

Physics
Calculate the work done by the applied force accelerating a 2 kg object at 3 m/s/s over 4 m if there is a 2.5 frictional force of resistance. I calculated using F=ma=6N; then net force = 6N-2.5N=3.5 N so W=fd=14J. Did I do this correctly? Thanks
April 6, 2009 by KC

physics
A 20.0kg block rests on a plane inclined at 20.0o to the horizontal. The coefficient of static friction is 0.250, and the coefficient of kinetic friction is 0.150. (a) What is the minimum magnitude of the force F, parallel to the plane that will prevent the block from slipping...
March 21, 2007 by Jean

Physics
A small boy is flipping a piece of cake across the lunch room at school. He uses a fork as a catapult by holding the handle on the table and pressing on the back of it with his thumb. Only part of the energy delivered to the fork goes into the accelerating the cake, however, ...
April 18, 2011 by micky

physics
take a satalite going around the earth... what allows us to say net force (radial) = Fg = Fr = ma were the Fg is the force of gravity exerted on the satalite were Fr is radial force and ma is the mass and acceleration of the satalite ok I understand newtons second law but what...
August 17, 2009 by physics

Physics
A power boat of mass 475 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 770 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume -- contrary to fact -- that the resistive force due to the water is ...
February 26, 2007 by Mary

Physics
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons. Arrange the force vectors tail to head and use ...
September 19, 2010 by Amy

Physics
I'm having a problem understanding a question. "If a man exerts a 200N force while pushing a crate 5.0 m across a floor against a frictional resistance of 40N, how much energy was expended by the person pushing?" I can figure out work done on the box and those sorts of ...
April 7, 2009 by Brigid

physics
3) A 5.0 kg book is sitting on a table. Which describes the force acting on the book a. there are no forces acting on the book b. the force of the table upward is greater than the force of gravity downward c. the net force on the book is zero d. kinetic energy counteracts the ...
February 23, 2010 by amber

HELP PLEASE
the wind blowing on a vertical surface varies jointly as the area of the surface and the square of the velocity. if a wind of 40 mph exerts a force of 50 pounds on a surface of 1/2 square foot , how much force will a wind of 80 mph place on a surface of 2 square feet the ...
October 1, 2007 by Katy

Physics ~Conservation of Energy~ part 2
1.) A 500 kg roller coaster is pulled to the top of a hill 45 m high and arrives at the top with a zero speed. a) how much work has done by the vhain to pull the car to the top? b) how much potential energy does it have at the top? c)What is the total energy of the system? d) ...
January 30, 2013 by Isis

Physics
A rope exerts a constant horizontal force of 203N pulling a 68-kg crate across the floor. The velocity of the crate is observed to increase from 3m/s to 5m/s in a time of 4 seconds under the influence of this force and the frictional force exerted by the floor on the crate. ...
June 21, 2013 by Tim

physics
While in empty space, an astronaut throws a ball at a velocity of 15 m/s. What will the velocity of the ball be after it has traveled 2 meters?
January 30, 2012 by Anonymous

physics
A baseball (m = 148 g) approaches a bat horizontally at a speed of 43.8 m/s (98.0 mi/h) and is hit straight back at a speed of 48.4 m/s (108 mi/h). If the ball is in contact with the bat for a time of 1.08 ms, what is the average force exerted on the ball by the bat? Neglect ...
July 25, 2013 by tcc

Science
Compare an astronauts weight in orbit with the astronauts weight on Earth, assuming the mass of the astronaut doesn't change.
March 28, 2011 by Janice

Science
Compare an astronauts weight in orbit with the astronauts weight on Earth, assuming the mass of the astronaut doesn't change.
March 28, 2011 by Janice

Science
What is the force of a 2.0N force and an 3.0N force acting on an object in the same direction?
November 9, 2010 by ced

physics
A toy car is given a quick push so that it moves on an inclined ramp. After it is released, it moves up, reaches its highest point and moves back down again. Friction is so small it can be ignored. What net force acts on the car? A. net force of zero B. Net constant force up ...
July 2, 2011 by alexa

physics 12 - dynamics
Hi, I'm just confused as to what steps to take in order to solve these problems. If you could please show your steps and method on how to approach these questions to get the answer that would be great. I have the answers to these too, if needed. I want to know how to solve ...
February 16, 2010 by iintense

Physics
A mass m1 = 3.3 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.4 kg which hangs freely from the string. When released, the hanging mass falls a distance d = 0.87 m. 1) How much work is done by gravity on the ...
September 30, 2012 by David

Physics
A worker pushes a 1500 N crate with a horizontal force of 345 N a distance of 24 m. Assume the coefficient of kinetic friction between the crate and the floor is .220. How much work is done by the floor on the crate? -M*g*(mu,k)*X Mg = 1500 N mu,k = 0.220 X = 24 m It is ...
February 27, 2007 by Mischa

Physics
(a) If the length of the Achilles tendon increases 0.55 cm when the force exerted on it by the muscle increases from 2200 N to 6000 N, what is the "spring constant" of the tendon? N/m (b) How much work is done by the muscle in stretching the tendon 0.55 cm as the force ...
June 8, 2012 by Adam

Mechanics
What force accelerates a 3kg mass at a rate of 4m/s^2? Assuming this is on smooth surface with no frictional force Force = mass x acceleration F = 3 x 4 F = 12N If there is a frictional force will have to look at the acceleration in the opposing direction first. thanks again
February 4, 2007 by Janine

physics
a baseball (m = 153 g) approaches a bat horizontally at a speed of 41.0 m/s (92 mi/h) and is hit straight back at a speed of 45.8 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.05 ms, what is the average force exerted on the ball by the bat? Neglect the...
November 9, 2011 by Kelsey

physics
A baseball (m = 151 g) approaches a bat horizontally at a speed of 39.8 m/s (89 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.05 ms, what is the average force exerted on the ball by the bat? Neglect the...
March 12, 2012 by Natasha

physics
A baseball (m = 135 g) approaches a bat horizontally at a speed of 40.4 m/s (90 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the ball by the bat? Neglect the...
November 12, 2012 by Anonymous

Physics
A baseball (m = 135 g) approaches a bat horizontally at a speed of 40.4 m/s (90 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the ball by the bat? Neglect the...
November 18, 2012 by D

Physics
The drawing shows a plane diving towards the ground and then climbing back upward. During each of these motions, the lift force L acts perpendicular to the dispacement s, which has the same magnitude of 2.8 103 m in each case. The engines of the plane exert a thrust T, which ...
February 27, 2007 by Mary

college physics
To stretch a spring 7.00 cm from its unstretched length, 16.0 J of work must be done. What is the force constant of this spring? What magnitude force is needed to stretch the spring 7.00 cm from its unstretched length? How much work must be done to compress this spring 4.00 {\...
September 21, 2010 by jon

physics
Workers who wash windows or paint the outside of buildings use an interesting contraption known as a painter's lift. This consists of a harness that the worker wears suspended by a rope. The rope runs through a pulley mounted on the roof of the building and back down to hang ...
June 4, 2013 by keshav

Science
An astronuat who was outside repairing his spaceship with a wrench lost his tie rope. Now he is stranded in space. Unfortunately, you can't swim in space. How can the law of conservation of momentum help the astronaut return to his ship.
September 28, 2010 by Carolyn

Science
plse help me and thxs you very much. A. What is the anology diffrence between a strong force and electrostatic force. B. What is the anology about the relationship between strong electrostatic forces in nuclear stability. plse help thxs
January 6, 2009 by ADL

Physics (High School)
A 7.24 g bullet moving at 636 m/s penetrates a tree to a depth of 4.87 cm. Use energy considerations to find the average frictional force that stops the bullet. Answer in units of N B) Assuming that the frictional force is constant how much time elapsed between the moment of ...
December 19, 2011 by Ama

Physics
Two lovebirds are held together by a stange force called love. Physicists recently discovered the functional form of love (a conservative force) as a function of distance, for lovebirds. Flove(x)=2x^2+3x^3. (units in meters) Assuming they start off next to each other, how much...
March 14, 2014 by Dan

physics
A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due to the force of friction. A. What was the acceleration of the car. B. What was the car’s initial momentum? C. What was its final momentum? D. What was the change in momentum of the car? E. What was the ...
October 23, 2011 by Anonymous

physics
A person has a mass of 50.0 kg. What is the pressure they exert on the blades of their ice skates if each skate blade is 15.0 cm long and 5.00 mm wide?
November 9, 2010 by Marcy

physics
Measuring in foot pounds of toque what pressure can the world’s strongest man exert by pulling on an object?
September 29, 2011 by Phill

science
A person has a mass of 50.0 kg. What is the pressure they exert on the blades of their ice skates if each skate blade is 15.0 cm long and 5.00 mm wide?
September 26, 2013 by Anonymous

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

Physics
A 4 kg block resting on a horizontal surface is attached to an 8 kg block that hangs freely by a cord passing over a frictionless pulley. The coefficient of kinetic friction between the block and the horizontal surface is 0.4. Find the acceleration of the blocks and the ...
November 18, 2006 by Vv

Physics
Consider a coin which is tossed straight up into the air. After it is released it moves upward, reaches its highest point and falls back down again. Air resistance can be neglected. What force acts upon the coin while it moves upward after it is released? a. Force of zero b. ...
June 30, 2013 by Jill

physics
A person pushes a 10 kg box from rest and accelerates it to a speed of 3.2 m/s with a constant force. If the box is pushed for a time of 2.6 s, what is the force exerted by the person? force*time=mass*changeinvelocity solve for force.
December 16, 2006 by mel

Physical Science
If 30 N of force is exerted over an area of 20 m2, how much pressure is being applied in pascals?
May 31, 2010 by Jonathan

physics
in deep space a gun is fired; how much force will be required to keep the bullet going?
November 29, 2010 by alexis

mechanical engineering
how much is the net force required to accelerate 1000kg of a car in 5mins/sec?
December 18, 2010 by deeva

physics
suppose you apply 3 newtons of force to slide a box 2 meters in 6 seconds, how much work did you do?
May 8, 2011 by Anonymous

physical science
A child pushes a book a distance of 17m. If 5J of work was done, how much force was used?
February 15, 2012 by Sarah

Physics
A force of 150N is exerted horzontally to dispalacement through adstance of 400cm.how much work done?
March 6, 2012 by Jarso

physical Science
How much force is required to give an object with mass of 20kg an acceleration of 12m/s2 ?
December 11, 2012 by Casey

Physics
While sitting in class your body exerts a force of 600 N on your chair. how much work did you do?
January 30, 2013 by Rebeca

sam
How much do you do if you push a garbage can with a force of 30N while sliding it 4 meters down the hall?
May 29, 2013 by pHYSICS

physics
How much force is needed to accelerate a 125 kg block up a 35 degree include at 3.4 m/s2 if the coefficient of friction is 0.28?
January 20, 2014 by Marina

Physics HELP ME PLEASE
A 1250 kg car increases it's speed from 11 m/s to 27 m/s in 5.4 s. - What is the cars acceleration? - How much force is required?
June 2, 2014 by Jamika

physics
An astronaut on Neptune drops a rock straight downward from a height of 0.95 m. If the acceleration of gravity on Neptune is 11.2 m/s2, what is the speed of the rock just before it lands? (m/s)
September 16, 2010 by jack

physics
The mass of a regulation tennis ball is 62.0 (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 34.0 . (This number can also vary, depending on the racket and swing.) We shall assume a 34.0 contact time throughout this ...
March 12, 2012 by Jodi

physics
A car is rounding a circular curve of radius r on a banked turn. As the drawing indicates, there are two forces acting on the car, its weight mg and the normal force FN exerted on it by the road. Which force, or force component, provides the centripetal force that keeps the ...
June 1, 2014 by sally

physics
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8 . A hockey puck with a weight of 0.80 is sliding freely across a section of very smooth (frictionless) horizontal ice. Part A When it is sliding freely, how does the upward force of the ice ...
September 29, 2012 by sammy

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