Friday

March 6, 2015

March 6, 2015

Number of results: 39,601

**Physics**

A solid ball and a hollow ball, each with a mass of 2 kg and radius of 0.1 m, start from rest and roll down a ramp of length 2 m at an incline of 34°. An ice cube of the same mass slides without friction down the same ramp. What is the speed of the solid ball at the bottom of ...
*June 18, 2012 by James*

**bobpursley**

I had ask this question of you before but I didn't understand your response. Can you please clearify further. The question is: a skateboarder moving at v = 5 m/s along a horizontal section of a track that is slanted upward by 48° above the horizontal at its end, which is h = 0...
*February 27, 2007 by Mary*

**PHYSICS**

A 16 kg block slides down a 30 degree frictionless incline where it is stopped by a strong Hook's Law spring at the bottom. The spring constant is k = 9.8 x10^4 N/m. If the block slides 9 m from the point where it was released (from rest) to the point where it comes to rest ...
*April 20, 2010 by Jason*

**physics**

A skier of mass 70kg is pulled up a slope by a motor-driven cable. The acceleration of gravity is 9.8m/s^2. How much work is required to pull him 60m up a 30.7º slope (frictionless) at a constant speed of 3 m/s? answer in units of kJ. In this question, I think I gotta use mgh ...
*September 17, 2006 by puff puff*

**AP Physics**

a 45 kg object slides down an uneven frictionless incline from rest without rotating. What is its speed after it travels 2.5 meters vertically
*October 30, 2010 by Asim*

**physics**

If 4.5 kg object is sitting at rest on a 30 degree incline that has a coefficient of static friction of .19, what is the net force down the plane? Does it start sliding?
*February 19, 2013 by Aaron*

**pysics.**

What is the minimum work needed to push a 975 kg car 230 m up along a 17.5° incline? Assume the effective coefficient of friction retarding the car is 0.20?
*October 12, 2009 by Joe*

**physics**

A 75g person on skis is going down a hill sloped at an angle 30.the coefficient of kinetic friction between the skis and the snow is 0.15.how fast is the skier going 10s after starting from rest?
*November 6, 2011 by Anonymous*

**Grammar **

Circle the adjectives that can be used with the nouns on the right . 1)upward 2)growing 3)recent (Problem) 1)steady 2)severe 3)reliable. (Supply) 1)available 2)increasing 3)public. (Concern) 1)immediate 2)effective 3)sufficient. (Solution) 1)affordable 2)rising 3)rapid. (...
*June 3, 2013 by Maryam*

**Physics**

A toy slides down an inclined plane which makes an angle of 60 degrees with the horizontal. It starts from rest and achieves a final velocity of 8 m/s in 5 seconds at the bottom of the plane. a. What is the acceleration down the plane? b. What is the distance along the plane ...
*November 2, 2013 by Tsunayoshi*

**physics**

A 650kg elevator starts from rest. It moves upward for 3s with constant acceleration until it reases its cruising speed, 1.75m/s. (a) what is the average power of the elevator motor during this period? (b) How does this compare with its power during an upward cruise with ...
*October 28, 2007 by Anonymous*

**PHYSICS**

An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table 5.50m away at a constant speed of 2.50m/s, returning just in time to catch the falling ball. (a)With what ...
*July 13, 2010 by Francis*

**physics**

Search: A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +18.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +11.0 revolutions. How much time does it take for the bike to come to rest? What ...
*February 25, 2011 by Taylor*

**physics**

A 23.0 kg box is released on a 39.0° incline and accelerates down the incline at 0.268 m/s2. Find the friction force impeding its motion.
*March 1, 2011 by md8*

**math**

jim's 10-foot garage casts a 7-foot shadow. his house has a 17.5-foot shawdow. how tall is his house
*May 23, 2011 by selena*

**Scientific studies**

A stone is thrown vertically upward with a speed of (a) How fast is it moving when it reaches a height of 11.0 m? (b) How long is required to reach this height? (c) Why are there two answers to (b)?
*February 17, 2010 by Aly*

**Physics**

A rok is thrown 24 meters/sec upward and lands in a 10 meter deep hole. How long is the rock in the air until it reaches the bottom of the hole?
*August 26, 2012 by Alex*

**physics**

A ball of mass .15 kg and a radius of .24 m is at the top of a 3.5 m tall hill with a 25 degree incline. What is the velocity of the ball as it reaches the bottom of the hill if it (a) rolls without slipping? (b)slips without rolling?
*October 28, 2010 by Anonymous*

**physics**

There is a block on top of an incline plane. The incline is going down to the right. The angle to the right of the 90 is 36.9 degree. There is a force pushing on it from the left. Find the applied force (F) needed to prevent the block from sliding down the incline; ignore ...
*June 26, 2011 by k9*

**Physics**

A physics book slides off a horizontal tabletop with a speed of 1.10m/s . It strikes the floor in 0.350s . Ignore air resistance. The height of the tabletop above th floor is .600m.The horizontal distance from the edge of the table to the point where the book strikes the floor...
*October 15, 2010 by Kara*

**Physics**

A physics book slides off a horizontal tabletop with a speed of 1.10m/s . It strikes the floor in 0.350s . Ignore air resistance. The height of the tabletop above th floor is .600m.The horizontal distance from the edge of the table to the point where the book strikes the floor...
*October 15, 2010 by Sam*

**Geometry**

I need help in this problem: A 14-foot ladder is leaning against a house so that its top touches the top of the wall. the bottom of the ladder is 8 feet away from the wall. which of these can be used to find the height of the wall? A. in a right triangle with 14-foot leg and ...
*March 27, 2014 by Alex*

**Physics**

A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...
*October 31, 2010 by Scott*

**physics**

You're quietly sitting by a street one day, enjoying the sun, when you notice a speeding car traveling at 20 m/s down the street. The driver notices that there's a stop sign in the street and hits the brakes 40 m before the stop sign, coming to a stop right at the sign itself...
*May 20, 2013 by hemant*

**PHYSICS**

An electron is initially at rest in, but not on the axis of, a solenoid that is carrying a steady current I directed as shown in the cross section below (counterclockwise). The electron is initially at rest on the -x axis. The current in the solenoid is suddenly increased to ...
*December 17, 2013 by asha*

**physics**

A rock is given a KE of 2.00*10^4 J when it is launched vertically upward. If the rock reaches a height of 50m determine the mass of the rock.
*January 6, 2015 by moooose*

**Physics**

A small block slides along a track from one level to a higher level, by moving through an intermediate valley (see Figure). The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. Assume that the block's ...
*December 26, 2013 by George*

**College Physics**

A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...
*October 31, 2010 by Scott*

**Physics**

Mass 1 with a mass of 28.5 kg starts at rest at the top of a frictionless from a height of 17 meters. It then slides down the incline and moves over a horizontal frictionless surface and collides inelastically (head on) with mass 2 which is of unknown mass. After the ...
*November 15, 2012 by Chelsea*

**physics **

What is the minimum work needed to push a 950 kg car 890 m up along a 8.0 degree incline? Assume the effective coefficient of friction retarding the car is 0.22.
*October 10, 2011 by Luke *

**physics**

Starting from rest, a crate of mass m is pushed up a frictionless slope of angle (theta) by a horizontal force of magnitude F. Use work and energy to find an expression for the crate's speed v when it is at height h above the bottom of the slope. Express your answer in terms ...
*November 10, 2012 by Ohimai*

**physics**

A m = 2.51 kg mass starts from rest and slides a distance d down a frictionless theta = 34.6° incline. While sliding, it comes into contact with an unstressed spring of negligible mass. The mass slides an additional 0.220 m as it is brought momentarily to rest by compression ...
*October 31, 2009 by Anonymous*

**physics**

You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 17 m/s2. After 20 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect any effects due to ...
*August 9, 2014 by Danielle*

**physics**

a block moves up 45degree incline w/ constant speed under the action of a force of 15n applied parallel to the incline.If the coefficient of kinetic friction is 0.3, determine the weight of the block and minimum force required to allow the block to move down the incline at ...
*March 6, 2014 by kmae*

**Physics**

A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 22◦ below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
*October 23, 2013 by John*

**11th grade**

A 16.0 kg box is released on a 39.0° incline and accelerates down the incline at 0.267 m/s2. Find the friction force impeding its motion
*November 27, 2010 by Anonymous*

**Physics**

Determine the acceleration of a 1500 kg automobile that rolls down an incline of 30° from the horizontal if a coefficient of friction between the tires and the incline is 0.12
*June 10, 2014 by Corey Brown*

**physics**

Fred the otter climbed to the top of an inclined plane. His friend, Giselle the giraffe, suggested that he was so small that gravity would ignore him and he would be unable to slide down. "On the contrary", said Fred, "Since this slope makes an angle of 48.4 degrees with the ...
*November 13, 2012 by swag*

**physics**

Fred the otter climbed to the top of an inclined plane. His friend, Giselle the giraffe, suggested that he was so small that gravity would ignore him and he would be unable to slide down. "On the contrary", said Fred, "Since this slope makes an angle of 48.4 degrees with the ...
*November 13, 2012 by zach*

**algebra 2**

A skier has decided that on each trip down a slope, she will do 2 more jumps than before. On her first trip she did 6 jumps. Derive the sigma notation that shows how many total jumps she attempts from her fourth trip down the hill through her twelfth trip. Then solve for how ...
*October 20, 2014 by Please Help Me*

**Math**

A skier has decided that on each trip down a slope, she will do 2 more jumps than before. On her first trip she did 6 jumps. Derive the sigma notation that shows how many total jumps she attempts from her fourth trip down the hill through her twelfth trip. Then solve for how ...
*October 20, 2014 by Take a look Please*

**physics**

a 200 kg block was moved along an inclined plane to a height of 10m. during this process 3000J of energy was lost due to friction. a. calculate the efficiency of the inclined plane. b. what would the efficiency of the simple machine be if the incline were frictionless? c. how ...
*January 31, 2009 by april*

**physics**

An ambulance is traveling east at 60.7 m/s. Behind it there is a car traveling along the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 521 Hz. At what frequency does the driver of the car hear the ambulance’s siren? The velocity of sound in...
*January 26, 2014 by Need answer by 10pm*

**Physics**

"An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1 250 m/s when it enters a cylindrical tube of radius 0.500 m centered on the x axis. Inside the tube is a uniform electric field of 4.50 X 10^-4 N/C pointing in the negative y direction. How far ...
*February 21, 2011 by Anonymous*

**science**

A ? is a channel along which water is continually flowing down a slope
*February 27, 2009 by alison*

**math**

can someone help me set this up so i can solve. Problem #3 the posted speed limit for trucks along national route 3 is 35 MPH. how many kilometers will a convoy cover after 3.7 hours on the road traveling at the posted Problem # 5 IF the formula to figure volume for a cubic ...
*March 26, 2007 by jasmine20*

**Analytic geometry - finding point by intersect lin**

I have a triangle ABC. The slope of AB is -1/ab, the slope of AC is -1/ac, and the slope of BC is -1/ac. My question is, I have 3 lines: Altitude from A to BC, altitude from B to AC, and altitude from C to AB. I know their slope because it is just -1/slope. But I want to know ...
*March 5, 2013 by Knights*

**Physics**

A 2 kg ball is rolled down a hill 25 m tall. When it reaches the bottom of the hill it is traveling at 15.1 m/s. How much energy was dissipated due to friction?
*March 4, 2014 by Tyler*

**Physics**

a 300kg piano is being lifted at a steady speed from ground level straight up to an apartment 10.0m above ground. The crane that is doing the lifting produces a steady power of 400 W. How much time does it take to lift the piano?
*November 25, 2008 by Delli*

**physics**

A 40-kg sled rests at the top of a 34˚ incline that is 500 m long. If the coefficient of friction is 0.2, what will be the speed at the bottom of the slope? The 40-kg mass includes the mass of the person on the sled.
*March 31, 2012 by rahul patel*

**math**

a 4 foot by 8 foot panel, the top of wich is located 18 foot below the water line on a dam wall is subject to how much forec? ( assume the panel is oriented with the long side horizontal)
*September 29, 2011 by Anonymous*

**Physics**

In the flying ski jump, a skier acquires a speed of about 62 mph (this ended up being 27.7 m/s) by racing down a steep hill and then lifts off into the air off of a horizontal ramp. Beyond the ramp, the ground slopes at an angle of 45 degrees. a) Predict the distance downslope...
*September 6, 2013 by Lawon*

**Physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.6 m/s2 for 4.5 seconds. It then continues at a constant speed for 7.3 seconds, before applying the brakes such that the car...
*January 6, 2014 by Shreyas*

**physics**

a 0.40kg ball is thrown vertically upward with a speed of 30m/s. The ball reaches a height of 40m. What is the energy dissipated due to air friction?... please help i don't know what to do:(
*April 7, 2009 by julie*

**Math**

A carpenter purchased 25.25 feet of hardwood at $25.20 per foot, and 3 types of trim molding: 2.6 feet $1.90 per foot, 2.8 feet at $3.90 per foot, 7.5 feet at $4.90 per foot. How much did he spend on this purchase?
*March 2, 2010 by Nikki*

**College Physics I**

A helicopter traveling upward at 120 m/s drops a package from a height of 500 meters. To the nearest second how long does it take to hit the ground?
*August 26, 2012 by Dylan*

**physics**

I am having so much trouble with this D: A rocket is traveling straight up from its launch pad. An observer 5.00 km from the launch pad notices that at one instant, she must tilt her telescope 45.0 degrees upward to see the rocket. 10.0 seconds later, she must tilt her rocket ...
*August 25, 2011 by Jasmine*

**Physics**

A 200 toy car is placed on a narrow 64--diameter track with wheel grooves that keep the car going in a circle. The 1.5 track is free to turn on a frictionless, vertical axis. The spokes have negligible mass. After the car's switch is turned on, it soon reaches a steady speed ...
*November 7, 2011 by Hsieh*

**physics**

A body is thrown vertically upward from the top of the cliff 50m high. Has the body reaches the ground in 10. What is the initial velocity of body?
*August 21, 2010 by Anonymous*

**physics**

A body is thrown vertically upward from the top of the cliff 50m high. Has the body reaches the ground in 10. What is the initial velocity of body?
*August 21, 2010 by Anonymous*

**Physics.**

A mass of m1 = 12 kg is placed on an incline with an inclination angle of 50 degrees, a coefficient of kinetic friction of 0.16, and a coefficient of static friction of 0.89. m1 is tied to a rope which runs parallel to the incline and runs over a pulley to a hanging mass of m2...
*October 21, 2011 by Amanda *

**PHYSICS**

A 62 kg water skier, moving at 14 m/s , lets go of the towline. Momentum= 868 kgm/s Impulse= -868 Ns c.If the water exerts an average force of -275 N on the skier, how long must the force act? 3.16 s d. How far does she travel during this time? I'm guessing "this time" ...
*January 6, 2012 by Anon*

**Physica**

A man of 60 kg standing on a floor at rest. The normal force exerted by the floor on the man is: A)588 N upward B) 120 N downward C) 60 N downward D) 588 N downward E) 60 N upward
*July 11, 2012 by Q99*

**Physics**

A block initially at rest, slides down from the top of an inclined plane 30degrees above the horizontal. The plane is 100feet long and frictionless. what distance will it travel on a frictionless horizontal surface at the foot of the plane 6seconds after it has started from rest?
*January 12, 2015 by Albert*

**physics**

A block slides down a 10 angled incline at a constant speed. what is the coefficient of sliding friction between the blocks surface and the incline?
*November 8, 2008 by kim*

**physics**

A 5-kg box is released on a 30 degree incline and accelerates down the incline at 2.79 m/s^2. To the nearest tenth of a Newton, what is the friction force impeding its motion?
*November 16, 2012 by Danielle*

**Math**

Starting with the formula mg sin A = umg cos A, you can derive tan A = u to find the angle A of an incline and the coefficient of friction u of objects on the incline.
*October 13, 2014 by TeeKay*

**Math (trig)**

A force of 35lb is required to hold a 72lb toolbox on an incline. What angle does the incline make with the horizontal? Please help me set this up.
*November 23, 2014 by Alexis*

**trig**

I need help setting this problem up. A force of 36lb is required to hold a 70lb toolbox on an incline. What angle does the incline make with the horizontal?
*November 23, 2014 by IHS*

**Algebra HELP!!**

Write the equation of the line that contains the points (2, 2) and (-3, 12). Here is part of the answer. Can you identify the missing part? y = -2x + ___ I think it's 12 You've got the slope so use y-y1=m(x-x1) where (x1,y1) is either point. If you use (2,2), then y-2=-2(x-2) ...
*October 11, 2006 by Margie*

**Physics**

A cylinder and a solid disc are released from rest from the top of a ramp.They roll down the hill without slipping. Which statement iscorrect? a. The cylinder reaches the bottom first b. The disc reaches the bottom first c. They both reach the bottom at the same time d. Could ...
*April 21, 2009 by Sandy*

**Physics**

A car traveling 56 km/h is 21.0 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.17 s later. a)What was the car's constant deceleration before impact? b)How fast was the car traveling at impact?
*September 2, 2009 by Nick*

**physics**

There is a 0.225 T magnetic field directed along the +x axis and a field of unknown magnitude along the +y axis. A particle carrying a charge of 7.20 10-5 C experiences a maximum force of 0.455 N when traveling at a speed of 2 104 m/s through the region where the fields are. ...
*February 10, 2008 by rick*

**math**

A farmer is planting squashplants that need 2 3/8 feet to spread out. he has an area along a fence that is 20 feet long. Round the amount of space the squash plants need to the nearest 1/2 foot. How many squash plants can the farmer grow along the fence?
*January 26, 2010 by Anonymous*

**Physics**

A semitrailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway-truck ramp that is inclined at an angle of 10.0° above the horizontal. The semitrailer coasts to a stop after traveling 137 m along the ramp. What was the truck's ...
*October 20, 2012 by Elizabeth*

**Physics**

A 5 kg ball rolls down a 10meter long slope. Ignoring friction, how fast will the ball be rolling when it reaches the bottom?
*October 21, 2013 by Nina*

**Physics**

A 521 N box is sitting on a 33.5° incline. Find the force of gravity parallel (Fp) to the surface of the incline, and the force of gravity perpendicular to the surface of the incline (FN). a. If the coefficient of static friction is 0.227, find the Ff . b. Will the box slide ...
*October 23, 2012 by MaKayla*

**Phisics (Urgent)!!!!!!!!!!!!!!!!!!!!!!**

A small block of mass m=1 kg glides down (without friction) a circular track of radius R=2 m, starting from rest at height R. At the bottom of the track it hits a massless relaxed spring with spring constant k= 9 N/m, which starts to be compressed as the block continues to ...
*January 12, 2014 by Anonimus*

**physics**

- A 1600-KG ELEVATOR accelerates downward at 2.00 m/s2 starting from rest. how much work does gravity do on the elevator? b) how much does tention in the elevator cable do on the elevator? c) use the work kinetic energy theorem to find the kenetic energy of the elevator as it ...
*November 29, 2010 by Anonymous*

**Pre-Calculus**

help please Identify the slope and intercept of the following linear equation. y=3/7x-5 Slope: 3/7; intercept: 5 Slope: -5; intercept: 3/7 Slope: 5; intercept: 3/7 Slope: 3/7; intercept: -5
*September 24, 2014 by Anonymous*

**Physics**

A ball thrown vertically upward is caught by the thrower after 20.0 s. FInd (a)the initial velocity and (b) the maximum height it reaches. All I am given is time. How am I suppose to find (a) and (b)?
*September 12, 2007 by Anonymous*

**Physic **

A ball is thrown vertically upward with a speed of +12.0m/s. A. how long the ball take to hit the ground after it reaches it highest point? B. What is its velocity when it returns to the level from with it started?
*September 23, 2009 by Chan*

**physics**

A ball is thrown vertically upward with a speed of +12.0 m/s. How long does the ball take to hit the ground after it reaches its highest point? What is its velocity when it returns to the level from which it started?
*May 14, 2011 by anne*

**slope algebra**

given ab and its midpoint m. the coordinates of a are (-10,-3) and the coordinates of M are (-4,-1) a. find the coordinates of B. b. find the slope of am. c. find the slope that is perpendicular d. find the slope that is parallel e . write the equation of AM answers. please ...
*December 13, 2010 by SKipper*

**Physics**

A car traveling on a flat (unbanked) circular track accelerates uniformly from rest with a tangential acceleration of 1.70 m/s2.The car makes it one quarter of the way around the circle before it skids off the track. Determine the coefficient of static friction between the car...
*February 22, 2010 by engmath*

**Pls help me now**

A 75g person on skis is going down a hill sloped at an angle 30.the coefficient of kinetic friction between the skis and the snow is 0.15.how fast is the skier going 10s after starting from rest?(answer=36m/s)
*November 6, 2011 by Henneh *

**Science**

Abox of mass 60kg starts from the rest at height h and slides down a rough slope of length 10m, which makes an angle of 25 degree with the horizontal. It undergoes a constant acceleqation of magnitude 2m/ while sliding down the slope. Calculate the work done on the box by the ...
*July 2, 2014 by Sphelele*

**Physics**

(1) A bullet of mass 1.9×10−3 kg embeds itself in a wooden block with mass 0.987 kg, which then compresses a spring (k = 120 N/m) by a distance 3.5×10−2 m before coming to rest. The coefficient of kinetic friction between the block and table is 0.42. What fraction ...
*October 8, 2010 by Fred*

**physics**

Question: The swim portion of a triathlon takes place in a river and is an out-and-back course. The river has a steady current that is 0.400m/s and the athletes swim against the current for 750m before turning and swimming with the current for the second 750m. If one ...
*September 16, 2014 by Sydney*

**Geometry **

The grade of a road or a railway road bed is the ratio rise/run, usually expressed as a percent. For example, a railway with a grade of 5% rises 5 ft for every 100 ft of horizontal distance. 1. The Johnstown, Pennsylvania, inclined railway was built as a "lifesaver" after the ...
*April 15, 2013 by Stacey*

**Physics**

A motorist traveling at 15m/s encounters a deer in the road 38m ahead. If the maximum acceleration the vehicle's brakes are capable of is -7m/s/s, what is the maximum reaction time of the motorist that will allow him or her to avoid hitting the deer? Answer in units of s. I ...
*October 16, 2011 by Dawn*

**art**

A piano whose mass is 106 kg is being lifted at a steady speed from ground level straight up to an apartment 12.4m above the ground. The crane that is doing the lifting produces a steady power of 565W. How much time does it take to lift the piano?
*October 25, 2009 by lawless*

**physics**

Three applied forces, F1= 20.0 N, F2= 40.0 N, and F3 = 10.0 N act on an object with a mass of 2.00 kg which can move along an inclined plane as shown in the figure. The questions refer to the instant when the object has moved 0.600 m along the surface of the inclined plane in ...
*November 7, 2012 by naf*

**physics**

Water skiers often ride to one side of the center line of a boat, as shown in the figure . In this case, the ski boat is traveling at 15 {\rm m}/{\rm s} and the tension in the rope is 76 N. If the boat does 3600 J of work on the skier in 53.6 m, what is the angle \theta ...
*April 3, 2011 by Anonymous*

**Physics**

Water skiers often ride to one side of the center line of a boat, as shown in the figure. In this case, the ski boat is traveling at 15 m/s and the tension in the rope is 90 N. If the boat does 3500 J of work on the skier in 42.4 m, what is the angle θ between the tow ...
*October 11, 2011 by kidincoll3ge*

**physics**

water skiers often ride to one side of the center line of a boat, as shown 7-14. In this case, the ski boat is traveling at 15m/s and the tension in the rope is 80 n. If the boat does 3400 J of work on the skier in 50.3 m, what is the angle (theta) between the tow rope and the...
*February 5, 2013 by woody*

**Physics**

When switched off, a spinning ceiling fan slows down with an angular acceleration of 1.2 rad/s2. If the fan was spinning at the rate of 10π rad/sec before it was turned off, how many revolutions did it go through before coming to the stop?
*June 30, 2013 by Al*

**physics**

a 200 newtoon wagon is to be pulled up a a 30 degrees incline at constant speed. how large a force parallel to the incline is needed if friction are negligible?
*August 12, 2013 by stieven *

**Physics**

A skateboarder, with an initial speed of 2.6m/s , rolls virtually friction free down a straight incline of length 18m in 3.3 s. What angle is the incline plane?
*October 8, 2013 by Whitney*

**physics**

A 370kg piano slides 2.9m down a 24∘ incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Ignore friction.
*June 9, 2014 by jim*

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