Monday

December 22, 2014

December 22, 2014

Number of results: 51,612

**physics**

You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 273 N for 7.2 s, during which time the refrigerator moves a distance of 3.4 m at constant velocity.
*July 11, 2012 by Sierra*

**Physics**

A 75.0 kg skydiver is free falling at 65.0 m/s when she pops her parachute. As the 'chute opens she slows to 5.50 m/s over a distance of 45.0 m. What force does the parachute exert of her harness during this time?
*May 30, 2014 by Anonymous*

**Physics**

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?
*June 30, 2010 by Todd*

**Phy**

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?
*June 30, 2010 by Todd*

**Physics**

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?
*June 30, 2010 by Todd*

**physics**

A baseball player exert a force of 125 N on a 0.18 kg baseball for 33 sec. what is the baseball change of momentum ?
*December 13, 2014 by Tsion*

**Physics**

Two dogs are pulling on opposite ends of a bone. One dog pulls to the right with a force of 50N while the other pulls to the left with a force of 40N. Are the forces balanced or unbalanced? How do you know? What is the net force on the bone? Would the bone's velocity change? Why?
*March 7, 2011 by Rosie *

**Science**

Explain: You pull a door open. If the door exerts on you is equal to the net force you exert on the door, why don't you move?
*March 16, 2008 by Jennifer*

**Physics**

A child pushes a toy box 4.0 m along the floor with a force of 6.00 N directed downward at an angle 37.0 degrees to the horizontal. (a)How much work does the child do? (b)Would you expect more or less work to be done if the child pulled upward at the same angle? try asking for...
*September 9, 2006 by fluffy*

**PHYSICS**

Junes Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 255 m long cannon with a launch speed of 11.42 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch? Compare your answer with...
*November 1, 2008 by maybo*

**physic**

Jules Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 220-m-long cannon with a launch speed of 10.97 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch? Compare your answer with...
*October 8, 2009 by aRd*

**math**

A rocket is launch from the top of an 40 foot cliff with an initial velocity of 140 feet per second, the height h of the rocket after t seconds is given by the equation h=16t^2+140t+40. How long after the rocket is launch will be 30 feet from the ground?
*November 26, 2013 by Wes*

**physics**

A 5.0-kg block at rest on a frictionless surface is acted on by forces F1 = 5.5 N and F2 = 3.5 N. What additional horizontal force will keep the block at rest? Answer: F3 = (-7.6 N)
*April 20, 2011 by rex*

**Physics**

Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 93.3 N, Jill pulls with 73.1 N in the northeast direction, and Jane pulls to the southeast with 181 N. (Since the donkey is involved with such uncoordinated people, who can blame it for ...
*November 14, 2013 by James*

**physics **

A cannon fires a shell at an angle of 55.0° above the horizontal. The shell has a mass of 17.5 kg, and its initial speed as it leaves the cannon is 289 m/s. The cannon is not anchored to the ground. It is mounted on a base—a large block of wood—which is sitting on a level ...
*November 1, 2010 by becca*

**statics**

A 10kg block rest on top of a 50kg block. A force of 120n is being pushed on the 10kg block at an angle of 45 deg. What is the magnitude of frictional force between the blocks? The cofficient is force is .4
*December 9, 2012 by james*

**Physics**

Find the magnitude of the gravitational attraction force that the earth exerts on a 62-kilogram astronaut who is 8.00 X 10^7 meters away from the center of the earth. Useful numbers: M^earth=5.98 X 10^24kg; G=6.67 X 10^-11 N*m^2kg^-2 Please walk me through your steps, don't ...
*June 11, 2012 by Jen*

**physics**

An astronaut of mass 80 kg lands on a planet,the radius of which is half that of the earth and the mass of which is three times that of earth.what will be the force of attraction which this planet has on him?
*February 26, 2014 by natty*

**Physics**

Two dogs are pulling on opposite ends of a bone. One dog pulls to the right with a force of 50 N while the other pulls to the left with a force of 40 N. Are the forces on the bone balanced or unbalanced? How do you know? What is the net force on the bone? Would the bone's ...
*November 28, 2010 by Jasper*

**Physics**

A 4.3 kg particle starts from rest and moves a distance of 3.6 m in 2.5 s under the action of a single, constant force. Find the magnitude of the force. Answer in units of N.
*September 27, 2010 by Wendia*

**Physics**

A 3.9 kg particle starts from rest and moves a distance of 2.4 m in 2.4 s under the action of a single, constant force. Find the magnitude of the force. Answer in units of N.
*October 4, 2010 by Wendia*

**Physics **

A 25.0kg pickle is accelerated from rest through a distance of 6.0m in 4.0s across a level floor. If the friction force between the pickle and the floor is 3.8N, how much work is required to move the object?
*January 1, 2014 by Sandara*

**Physics **

An astronaut stands on the edge of a lunar crater and throws a half-eaten Twinkie™ horizontally with a velocity of 2.2 m/s. The floor of the crater is 95.4 m below the astronaut. What horizontal distance will the Twinkie™ travel before hitting the floor of the crater? (The ...
*November 9, 2009 by Katie*

**physics**

A student (m = 68 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From ...
*November 10, 2010 by sean*

**Physics**

3.16. An 1100-kg car accelerates from 0 to 30 m/sec in 12 sec. If a frictional force of 200 N opposes the motion, what forces must the wheels exert backward on the pavement to cause this acceleration?
*January 23, 2011 by Tezara*

**Physics**

A sprinter of mass 63.7 kg runs at a constant speed of 10.2 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.8 m.
*February 13, 2012 by Anonymous*

**Physics**

A sprinter of mass 63.7 kg runs at a constant speed of 10.2 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.8 m.
*February 13, 2012 by Mike*

**logic**

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
*March 5, 2013 by Anonymous*

**math**

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
*March 5, 2013 by nice*

**Algebra**

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
*March 7, 2013 by John*

**Algebra**

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
*March 7, 2013 by John*

**Algebra**

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
*March 7, 2013 by John*

**Physics**

The builders of the pyramids used a long ramp to lift 21000-kg (21-ton) blocks. If a block rose 0.86 m in height while traveling 20 m along the ramp’s surface, how much uphill force was needed to push it up the ramp at constant velocity?
*February 14, 2011 by Olga *

**physics**

The builders of the pyramids used a long ramp to lift 21000-kg (21-ton) blocks. If a block rose 1.0 m in height while traveling 21 m along the ramp’s surface, how much uphill force was needed to push it up the ramp at constant velocity?
*February 26, 2014 by marie*

**chemistry**

While you are at rest, your brain gets about 15% by volume of your blood. If your body contains 5.2 L of blood, how many liters of blood are in your brain at rest? and how many quarts?
*November 29, 2012 by carol*

**physics**

A 7 kg block slides on a horizontal frictionless surface with a speed of 1.2 m/s. It is brought momentarily to rest when it hits a bumper that cmopresses a spring. The acceleration of gravity is 9.8m/s^2. How much is the spring compressed if its force constant is 3kN/m? Answer...
*November 17, 2010 by Jeann*

**Uni Physics**

A 67 kg astronaut (Jeff), an 88 kg astronaut (Brett) and a 17 kg rock are tied together by a light rope during a space walk. The distance between Jeff and the rock is 5.0 m, the distance between Brett and the rock is 2.0 m. Find the position of the centre of mass of the system...
*October 2, 2012 by David Gia*

**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**

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**

1....How much force needed to bring a 3200 lb car from rest to a velocity of 44 m/s in 8 sec.? 2....A ball with a mass of 2 kg move to the right with a speed of 2 m/s. It hits a ball of mass 0.50 kg which is at rest. After collision the second ball moves to the right with a ...
*February 18, 2011 by EM*

**PHYSICS**

A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0170 s. The average force exerted on him by the ground is +16500. N, where the upward direction is taken to be the positive direction. ...
*October 21, 2010 by ZAC*

**Physics**

A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0120 s. The average force exerted on him by the ground is +17000. N, where the upward direction is taken to be the positive direction. ...
*November 12, 2012 by Don*

**PHYSICS **

A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the drawing. As the station rotates, an astronaut in chamber A is moved 3.18 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...
*April 2, 2011 by Jacob*

**Physics**

A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the figure. As the station rotates, an astronaut in chamber A is moved 1.50 x 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...
*October 15, 2013 by Dreama*

**Physics **

A block of mass 12.0 kg is initially sitting at rest on a 30.0o incline. There is a spring mounted to the ramp with spring constant k = 13500 N/m. The block is released to slide down the incline and comes to a stop momentarily after the spring has been compressed a distance ...
*May 30, 2014 by Allen*

**college**

A spaceship lands on the planet whose radius is 5 times that of planet earth and whose mass is 25 times that of planet earth. Find the apparent weight of the astronaut on the second planet if the astronaut weighs 150lbs on planet earth
*November 1, 2010 by Antonio*

**math**

A photographer charge 20 dollars for 8x10 plus sitting fee. If 55 dollars was total for 2 photos and sitting fee. Assume the relationship is linear. Find and interpret the rate of change and intial value.
*December 3, 2014 by kimberly craig*

**Physics**

A ball is thrown straight upward and rises to a maximum height of 16 m above its launch point. At what height above the launch point has the speed of the ball decreased to one-half of its initial value?
*December 19, 2008 by Sara*

**physics**

A ball is thrown straight upward and rises to a maximum height of 14.6 m above its launch point. At what height above its launch point has the speed of the ball decreased to one-half of its initial value?
*September 18, 2012 by gary*

**Physics**

A ball is thrown straight upward and rises to a maximum height of 23 m above its launch point. At what height above its launch point has the speed of the ball decreased to one-half of its initial value?
*August 11, 2013 by Has*

**Physics**

A ball is thrown straight upward and rises to a maximum height of 20 m above its launch point. At what height above its launch point has the speed of the ball decreased to one-half of its initial value?
*January 24, 2014 by Cara*

**math**

A model rocket is launched with an initial velocity of 250 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 250t. How many seconds after launch will the rocket be 730 ft above the ground? Round to the nearest hundredth of a ...
*July 11, 2011 by sabrina*

**math**

A model rocket is launched with an initial velocity of 250 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 250t. How many seconds after launch will the rocket be 730 ft above the ground? Round to the nearest hundredth of a ...
*July 11, 2011 by sabrina*

**math**

A model rocket is launched with an initial velocity of 160 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 160t. How many seconds after launch will the rocket be 350 ft above the ground? Round to the nearest hundredth of a ...
*November 22, 2013 by sydney*

**Physics**

At time t = 0, a projectile is launched from ground level. At t = 2.00 s, it is displaced d = 57 m horizontally and h = 73 m vertically above the launch point. At the instant it reaches its maximum height above ground level, what is its horizontal displacement D from the ...
*September 25, 2011 by Sam*

**Physics**

a 2.5kg block initially at rest on horizontal surface. A horizontal force F of magnitude 6N and a vertical force P are the applied to the block. The coefficients of friction for the block and surface are Ms=0.4 and Mk=0.25.Determine the magnitude of the frictional force acting...
*October 8, 2011 by Fatima *

**Physics**

please i need help with this question. Initailly at rest, a car (mass=1300kg) accelerates north from a set of traffic lights at a constant rate for 10s. 11s after starting to accelerate it crosses an intersection and is hit by a second car (mass=1224kg) heading west at 65k/h. ...
*April 26, 2012 by Rachel*

**Physics question**

1.) If the curling stone was initially sliding at 2.97 m/s and stopped precisely 10.8 meters from its launch point, then the coefficient of friction (the ratio between the magnitude of the frictional force and the magnitude of the normal force) was? 3.) Two curling contestants...
*June 21, 2012 by Christina*

**introductory Facts and concepts**

On page 111 of your reading material there is a problem that requires you to calculate the average speed for a daylong bus trip. The rest stops the driver made are included in the calculations because that is how the problem is defined. However, suppose the bus driver’s ...
*February 18, 2013 by Anonymous*

**English**

Can you please tell me if the following sentences are possible? Thank you very much. 1) A trochee consists of a stressed syllable followed by an unstressed one. A trochee consists in a stress-unstress pattern. 2) The mirror is described as being unprejudiced. 3)t can also be ...
*November 28, 2010 by Franco*

**physic**

9. A 2.00-kg object is attached to a spring and placed on a frictionless, horizontal surface. A horizontal force of 20.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position (the origin of the x axis). The object is now released from...
*June 29, 2013 by Ika Diana*

**English**

1. While he was based on the sketches, Degas painted in his studio. 2. While he was walking on the street, he met a friend of his. 3. While he was driving, he sometimes smoked. 4. While he was chatting, he drank coffee from time to time. (What about the sentences using 'while...
*August 31, 2010 by rfvv*

**chemistry**

While you are at rest your brain gets 15% by volume of your blood. If your body contains 5.2 L of blood, how many liters of blood are in your brain at rest? and how many quarts?
*January 23, 2014 by Anonymous*

**Physics**

How much power does a water pump exert lifting 30 kg of water at a constant velocity 20 m each second
*February 19, 2012 by Bret*

**Physics**

7) Find the force of gravity between two 74.0 kg physics students that are sitting 0.85 m apart 7579.24 N 5.057 x 10(-7) N None of these choices are correct 9.8 x 10(-7) N I'm unsure of how to begin.
*October 31, 2009 by Anonymous*

**physics**

A bookshelf is at rest in a room. A force of 35.0 newtons is applied to a bookshelf. If the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf?
*March 24, 2014 by corey*

**Physics**

The average energy flux in the sunlight on the Earth is ⟨S⟩=1.4×103 W/m2. You might need to use some of the following constants: Distance from earth to the sun=AU=150×109m REarth=6.4×106m RSun=7.0×108m G=6.67×10−11m3/(kgs2) MEarth=5.97219×1024kg MSun=1.9891...
*May 22, 2013 by Annoyingmous*

**@damon physics**

I was wondering if you can help me with these two questions. Thank you Question # 1 A horse is pulling a heavy cart up a hill. The cart has 400 kg of mass inside it. The horse is pulling the cart with 10 N of force. What is the magnitude of the force on the horse due to the ...
*April 22, 2012 by Teal*

**physics**

A 56.0 ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.00 turns each second. The distance from one hand to the other is 1.5 . Biometric measurements indicate that each hand typically makes up about 1.25 of body weight. ...
*November 8, 2010 by steph*

**Physics**

A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood surfaces is 0.61, what ...
*October 19, 2012 by Lily*

**physics**

A piece of wood with mass m = 2.8 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 440 N on the wood. If the coefficient of static friction between the wood surfaces is 0.66, what ...
*October 3, 2013 by holly*

**physics**

a atapult launcher on an aircraft carrier accelerates a jet from rest to 72m/s. The work done catapult during the launch is 7.6 x 10 to the 7th J. a)What is the mass of the jet? b) If the jet is in contact with the catapult for 2s, what is the power output of the catapult?
*March 15, 2010 by Clayton*

**science**

tThe bob of a pendulum swings through a circular arc of constant radius. At what point of the swing does the cord holding the bob exert the greatest entripetal force on it?
*January 9, 2011 by Anonymous*

**physics**

the two upper front teeth of a person exert a total force of 30 N on a piece of steak.IF THE BITING EDGE OF EACH TOOTH MEASures 10mm x 1 mm,find the pressure on the steak
*November 1, 2011 by asembi*

**Physics**

A block of mass 21.0kg kg slides down a frictionless surface inclined at 33 ∘ ^\circ.To ensure that the block does not accelerate, what is the magnitude of the smallest force that you must exert on it?
*February 19, 2014 by Shannon*

**Physics**

A power boat of mass 495 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 780 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 constant, ...
*February 25, 2008 by John*

**Physics**

A power boat of mass 460 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 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 constant, ...
*February 25, 2008 by Peter*

**physics**

A power boat of mass 465 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 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 constant, ...
*October 23, 2010 by Xavier*

**Physics. PLEASE HELP!!**

A 1.3 kg steel ball and 8 m cord of negligi-ble mass make up a simple pendulum that can pivot without friction about the point O. This pendulum is released from rest in a horizontal position and when the ball is at its lowest point it strikes a 1.3 kg block sitting at rest on ...
*April 7, 2012 by Amber*

**Physics/Math**

At a certain instant, a particle-like object is acted on by a force F = (3.0 N) i - (1.0 N) j + (8.0 N) k while the object's velocity is v = - (2.0 m/s) i + (4.0 m/s) k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the ...
*March 5, 2007 by Technoboi11*

**Science**

Moving at 20 m/s , a remote controlled car of mass 1000kg hits a pile of sand and comes to rest in 10 s. Find the average force that acted to stop the car. The same car now hits a wall and comes to rest in 1s. Find the average force that acted to stop the car. Use knowledge ...
*August 22, 2006 by Abby*

**Physics**

A spring oriented vertically is attached to a hard horizontal surface as in the figure below. The spring has a force constant of 1.64 kN/m. How much is the spring compressed when a object of mass m = 2.35 kg is placed on top of the spring and the system is at rest?
*April 26, 2013 by Abdul*

**Physics (please help!!!!)**

A box with a volume V = 0.04 m3 lies at the bottom of a lake whose water has a density of 103 kg/m3. (a) How much force is required to lift the box, if the mass of the box is 1050 kg? (b) How much force is required to lift the box, if the mass of the box is 100 kg? (c) How ...
*April 16, 2011 by Anonymous*

**physics**

An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of +13 m/s and measures a time of 20.5 s before the rock returns to his hand. What is the acceleration (magnitude and direction) due to ...
*July 4, 2010 by Dave*

**physics**

A person pushes a 14.5 kg lawnmower at constant speed with a force of 88 N directed along the handle, which is at an angle of 45o to the horizontal. What is the force required to accelerate it from rest to 1.5 m/s in 2.5 seconds?
*October 11, 2008 by Steve*

**Science**

you draw a 100kg sack of maize meal across the floor of a warehouse for the distance of 10m. You apply a force of 300N, directed at an angle of 30 degree to the floor. a) If the floor is frictionless, how much work do you do on the bag? b) If the coefficient of friction ...
*June 2, 2010 by Akkie*

**physic**

In an accidental explosion, a satellite breaks in half while in circular orbit about Earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?
*April 21, 2010 by bernice*

**ITT**

In an accidental explosion, a satellite breaks in half while in circular orbit about earth. one half is brought momentarily to rest. what is the fate of the half brought to rest? what happens to the other half?
*October 19, 2010 by ed*

**Physics**

In an accidental explosion, a satellite breaks in half while in circular orbit about earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?
*October 20, 2010 by ed*

**Maths**

Humans breathe about 15 breaths in a minute.The average breath at rest contains 0.76 liter of air.About how many liters of air will you breathe while at rest for 25 minutes? Please,show working.
*January 21, 2011 by Anonymous 1*

**Force if Distance is Doubled (Physics 11th Grade)**

Two like-charged balloons, placed at a distance of .5 meters, experience a repulsive force of .32 N. What is the force if the distance between the two balloons is doubled? If you use Coulomb's Law, the equation used to find .32 N was Force = the constant of K multiplied by the...
*February 25, 2011 by Angela*

**physics**

two tractors pull against a 1000 kg log. if the angle of the tractors chains in relation to each other is 18 degrees and each tractor pulls with a force of 800N what forces will they be able to exert
*November 8, 2011 by payton*

**phyics**

You are installing a new spark plug in your car, and the manual specifies that it be tightened to a torque that has a magnitude of 65 N·m. Using the data in the figure, determine the magnitude F of the force that you must exert on the wrench.
*November 1, 2013 by bobby*

**Phsics**

A crate weighing 600. N is being pulled across the floor. You pull up and to the right on a rope which is attached to the crate. You exert a force of 155 N at an angle θ=29.0° above the horizontal.
*September 15, 2014 by Paige*

**physics**

The following data concerns a tennis ball at a given instant before it is struck by a tennis racket; horizontal momentum of tennis ball= 2.4Ns kinetic energy of ball= 45J a) why is correct to give the direction of the momentum but not the kinetic energy b) write down in terms ...
*October 16, 2006 by Kim*

**physics**

A horse pulls a cart with a force of 40lb at an angle of 30 degrees above the horizontal and moves along at a speed of 6mi/hr. A) how much work does the force do in 10 min? B) What is the average power (in horsepower) of the force?
*July 18, 2010 by James*

**Physics**

Tom Brady passes a football – at a velocity of 50 ft/s at an angle of 40 degrees to the horizontal – toward an intended receiver 30 yd straight downfield. The pass is released 5 ft above the ground. Assume that the receiver is stationary, is isolated and that he can catch the ...
*April 25, 2011 by Rob*

**english**

Select the sentence that is punctuated correctly. (Points : 1) Sitting in the medical office waiting room, Veronica smiled nervously at the woman sitting next to her, but then she had to get up suddenly because the receptionist summoned her to the window. Sitting in the ...
*October 25, 2013 by anngelique*

**physics**

what is the equal and opposite force the force of friction like if a block is at rest on a table static friction is stil exerted by the table onto the block keeping it from moving what is the equal and opposite force of this force?
*September 3, 2009 by physics*

**Science Physics**

A rubber ball of mass m1= 10kg is moving to the right with speed v1= 10m/s. it collides elastically with another ball of mass m2= 50kg, which is sitting at rest. m2 is larger than m1, what are the speeds of the balls, v1 and v2 after the collision?
*February 3, 2011 by Alan*

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