Tuesday

February 28, 2017
Number of results: 79,512

**physics**

An interstellar ship has a mass of 1.20 X10^6 kg and is initially at rest relative to a star system. a) what constant acceleration is needed to ring the ship up to a speed of .10c (where c is the speed of light, 3.0X10^8 m/s) relative to the star system in 3 days? b) what is ...

*November 21, 2006 by Bri*

**Calculus**

A piece of wire 40cm long is cut into two pieces. One piece is bent into the shape of a square and the other is bent into the shape of a circle. How should the wire be cut so that the total area enclosed is a) a maximum? /b) a minimum? Perimeter of square = x Circumference of ...

*January 20, 2010 by sh*

**Physics**

Calculate the height through which a crane can lift a load of 4 ton when it's motor of 4 H.P operates for 10 sec. Acceleration due to gravity is 10 m/s2

*September 20, 2015 by Sarthak*

**Math-which is correct**

1 euro is worth 1.2 U.S dollars if I budget 150$ per night for a hotel room. What is the maximum number of euros I should spend for a room? My answer is 108 euros as a maximum (with an actual number of 107.425) Correct??? * Math-check my answer - DrBob222, Tuesday, September ...

*September 15, 2009 by Christy*

**pre-calc**

Physics: a ball is thrown vertically upward with an initial velocity of 80 feet per second. the distance (in feet) of the ball from the ground after t seconds if s=80t-16tt^2 a) draw the illustration b) for what time interval is the ball more than 96 feet above the ground? c) ...

*November 10, 2011 by steph*

**MATH**

You are asked to calculate the weight that a hotel elevator can safely carry. You should expect your answer to be

*January 14, 2016 by JOSEPH*

**physics**

A solid block of mass m2 = 1.0 $kg$, at rest on a horizontal frictionless surface, is connected to a relaxed spring (with spring constant k = 260 N/m whose other end is fixed. Another solid block of mass m1 = 2.4 kg and speed v1 = 3.3 m/s collides with the 1.00 kg block. If ...

*March 21, 2014 by Tay*

**Math**

The parabola, B, represents a shuriken's maximum throwing distance, which was 60 meters of the enemy ninja, A, from a height of 7 meters. Figure out the trait of the enemy ninja that can be observed from the ellipse formed by the shuriken, and figure out the maximum throwing ...

*May 24, 2013 by Alan*

**Physics**

A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 174.0 N at an angle of 27.0 degrees with the horizontal. The box has a mass of 39.0 kg, and the coefficient of kinetic friction between the box and floor is 0....

*March 15, 2011 by Chris*

**Physics**

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of F = 84.4 N at an angle of 64degrees. The acceleration of gravity is 9.8 m/s/s. The box of books has a mass of 14 kg and the coefficient of kinetic ...

*October 30, 2011 by Amanda*

**physics**

A small sphere of mass m = 7.50 g and charge q1 = 32.0 nC is attached to the end of a string and hangs vertically as shown in the figure. A second charge of equal mass and charge q2 = –58.0 nC is located a distance d = 2.00 cm below the first charge. (a) Find the tension in ...

*November 6, 2012 by renee*

**math**

The profit in dollars in producing x- items of some commodity is given by the equation P = - 40 x^2 + 1000 x - 5250 . How many items should be produced to maximize the profit? What is the maximum profit?

*February 9, 2014 by Lucy*

**basic geometry**

for safety reasons , anyone parasailing behind a boat needs to stay at least 25 feet away from the back of the boat. if you were parasailing using a 250 foot rope , how far from the boat would you be if you were 100 feet high in the air ? round to the nearest tenth. what is ...

*December 11, 2013 by anabelle need help!*

**Physics**

A bullet with the mass of 45 g is fired into an 8.3 kg block of wood resting on a floor against a spring. This ideal spring (k = 76 N/m) has a maximum compression of 28 cm. What was the initial speed of the bullet?

*July 17, 2012 by KnowsNothing*

**physics**

The two angled ropes used to support the crate in Figure P5.7 can withstand a maximum tension of 1500 N before they break. What is the largest mass the ropes can support?

*October 8, 2012 by charlie*

**Physics**

An object with a mass of 20.1 kg is hung from two identical springs vertical. The springs both stretch 0.23 meters from equilibrium with the attached mass. One of the those springs is placed on a horizontal surface without friction and the mass of 20.1 kg is held still next to...

*November 15, 2012 by Chelsea*

**Physics**

A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 130 N at an angle of 30.0° above the horizontal. The box has a mass of 24.0 kg, and the coefficient of kinetic friction between box and floor ...

*March 8, 2012 by Cindy*

**Physics**

A 2010 kg car traveling to the west at 18.5 m/s slows down uniformly under a force of 8880 N to the east. a) How much force would be required to cause the same acceleration on a car of mass 3120 kg? How far would the car move before stop- ping? Answer in units of m

*November 13, 2011 by Eileen*

**physics**

mass of passenger is 90 kg and mass of scale is 40 kg what is scale reading inside an elevator moving at 7.8 m/s2 upward? does the mass of the scale affect the scale reading ?

*November 3, 2013 by andy*

**science**

a bicyclist and his bike have a combined mass of 105 kg. He is traveling at 15.0 m/s along the path when he sees a fallen tree 4 m in front of him. In order to stop before hits the tree, find the boy's minimum acceleration and the minimum force that must be applied. Thank You...

*December 30, 2006 by leafprincess*

**physics**

To move a large crate across a rough floor, you push on it with a force F at an angle of 21°, below the horizontal, as shown in the figure. Find the acceleration of the crate, given that the mass of the crate is m = 38 kg, the applied force is 329 N and the coefficient of ...

*October 14, 2011 by anonymous*

**Physics**

In the picture to the right, a ring pulls a box of mass m = 5.0 kg across a level table. The string pulls with a tension F = 25.0 N at an angle θ = 25˚ above the horizontal. A frictional force of 4.0 N also acts on the box. Calculate a. the normal force on the box. b...

*January 31, 2015 by Madison*

**Calculus**

The hypotenuse of a right triangle has one end at the origin and one end on the curve y=x^(7)e^(-7x) , with x greater than or equal to 0. One of the other two sides is on the x-axis, the other side is parallel to the y-axis. Find the maximum area of such a triangle. Round your...

*October 21, 2008 by George*

**Math**

Using h(t)=gt^2+v0t+h0, where g= -16, h0= initial height, v0= initial velocity, and t= time A rocket is fired into the air from the top of a building that is 200 feet tall. The initial velocity of the rocket is 600 feet/sec. If necessary, round answers to the nearest hundredth...

*April 14, 2012 by Brandon*

**physics**

A test rocket is launched vertically from ground level (y = 0 m), at time t = 0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 49 m and acquired a velocity of What is the maximum ...

*September 26, 2013 by D*

**Physics**

A hang glider and its pilot have a total mass equal to 120 kg. While executing a 360 degree turn, the glider moves in a circle with an 8-m radius. The gliders mass is 10 m/s. a) what is the net force on the hang glider? b) What is the acceleration?

*June 21, 2011 by Isaac*

**Physics**

A hang glider and its pilot have a total mass equal to 120 kg. While executing a 360 degree turn, the glider moves in a circle with an 8-m radius. The gliders mass is 10 m/s. a) what is the net force on the hang glider? b) What is the acceleration?

*November 5, 2013 by Bill*

**physics**

A baseball pitcher throws a ball with a maximum speed of 150. km/h. If the ball is thrown horizontally, how far does it fall vertically by the time it reaches the catcher's glove 20. m away? Give your answer numerically in meters using decimal notation (omit the units). Use ...

*September 21, 2009 by Rose*

**Business Mathematics**

A local travel agent is organizing a charter ride to a well known resort. The agent has quoted a price of $30 per person if 100 or fewer sign up for the ride. For every person over the 100, the price of the ticket for all will decrease by $2.50. For instance, if 101 people ...

*October 15, 2016 by Arslan*

**Physics**

A man seeking to set a world record wants to tow a 110000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 70 kg, and the coefficient of static friction between his shoes and the runway is 0.76. What is the greatest...

*September 22, 2012 by StressedStudent*

**Physics**

A man seeking to set a world record wants to tow a 122000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 95 kg, and the coefficient of static friction between his shoes and the runway is 0.74. What is the greatest...

*March 20, 2013 by Kelly*

**Physics**

A man seeking to set a world record wants to tow a 122000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 95 kg, and the coefficient of static friction between his shoes and the runway is 0.74. What is the greatest...

*March 20, 2013 by Heather*

**English**

1. In conducting a personal interview, setting limits on what will be covered should occur: A. at the beginning of the interview. B. in the middle of the interview. C. at the end of the interview. D. during the strategy stage. i'm confused between A & D 2. For Thomas to ...

*April 5, 2013 by Amy*

**physics**

A train consists of 40 freight cars, each having a mass of 2.71 × 105 kg. If the engine (which has twice the mass of a freight car) exerts a net force of +1.12 × 105 N, what will be the acceleration of this train?

*August 24, 2012 by tyler*

**Weight Is Force! Science**

A space ship has a mass of 9000kg. the space ship is launched from Earth and lands on a distant planet where it has a mass of 390000 N. What is the acceleration of the gravity on this planet?

*March 3, 2016 by Anonymous*

**physics**

Calculate the maximum acc. of a car that is heading up a 4 degree slope. Assume that only half the weight of the car is supported by the two drive wheels and the static coefficient friction is involved- the tires can not slip during the acceleration a) on dry concrete, us=10 ...

*May 25, 2011 by jake moose*

**physics**

Chapter 02, Problem 62 A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 90.3 m/s2 for 1.75 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum ...

*December 16, 2015 by trish*

**Physics**

An astronaut is taking a space walk near the shuttle when her safety tether breaks. What should the astronaut do to get back to the shuttle? Answer: Take a tool from her tool belt and throw it away from the shuttle. Next Question:Assuming that the astronaut can throw any tool ...

*October 13, 2009 by Anonymous*

**Physics**

A car of mass 1000kg is travelling along a straight flat road at a constant speed of 30.0ms^-1. It then accelerates with constant acceleration of 3.00ms^-2 for 10.0s, after which it continues to travels at a constant speed. Determine: (a) The final speed of the car (b) The ...

*October 17, 2016 by Saphina Almatary*

**physics**

3- An electric motor can accelerate a Ferris wheel of moment of inertia (I =20 000 kg.m2) from rest to (10.0 rev/min) in (12.0 s). When the motor is turned off, friction causes the wheel to slow down from (10.0 to 8.00 rev/min) in (10.0 s). Determine (a) the torque generated ...

*March 16, 2013 by a*

**physics**

two dogs play tug of war with a rope toy that has a mass of 0.50 kg. if one dog pulls on the toy with a force of 140.0 N, and the other dog pulls in the opposite direction with a force of 138.0 N, what is the horizontal acceleration of the toy?

*November 30, 2011 by kristi*

**physics**

21.At the airport, a person pushes a luggage cart with an applied force of 150 N [forward]. Assuming the cart and luggage have a total mass of 46.0 kg and the force of friction is 95.0 N [backward], the magnitude of the acceleration of the luggage is _____ m/s2.

*March 22, 2015 by Trex*

**precalculus**

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree. For example degree 4=3...

*December 9, 2011 by Melinda*

**Math**

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree. For example degree 4=3...

*December 9, 2011 by Melinda*

**PHYSICS**

A 200g block slides back and forth on a frictionless surface between two springs, as shown. The left-hand spring has k = 130 N/m and its maximum compression is 16cm. The right-hand spring has k = 280 N/m. Find (a) the maximum compression of the right-hand spring and (b) the ...

*February 12, 2014 by Sarah*

**math**

If a projectile is launched from a platform 30 feet high with an initial velocity of 128 feet per second, then the height of the projectile at t seconds is given by s(t) = –16t2 + 128t + 30 feet. (a) At what time does the projectile attain its maximum height? Show some work...

*November 9, 2010 by Math is HARD*

**Physics**

If a dog chases its tail in a perfect circle of radius r at constant speed v, which of the following is true? A. The dog's acceleration is zero. B. The dog's velocity is constant. C. The sum of the forces, F , acting on the dog is zero. D. The time it takes the dog to make one...

*September 24, 2016 by Lyon*

**Physics**

A cup of coffee is sitting in an airplane flying at constant speed and altitude. Mu between cup and table is .36. The plane accelerates, maintaining constant altitude. What is the maximum acceleration that the plan can have without the cup sliding backwards?

*September 18, 2007 by Anonymous*

**Physics**

In a 100 m race, Maggie and Judy cross the finish line in a dead heat, both taking 10.6 s. Accelerating uniformly, Maggie took 2.20 s and Judy 2.90 s to attain maximum speed, which they maintained for the rest of the race. What was Maggie's acceleration?

*February 2, 2012 by Stacy*

**Physics**

A 10 m platform diver during his diving can increase his rotation rate from an initial rate of 0.8 rev/s to a maximum of 3.3 rev/s. If his initial moment of inertia was 10 kg·m2, what is his moment of inertia at his maximum rotation rate?

*April 26, 2013 by Derrick*

**physics**

An engine moves a boat through the water at a constant speed of 16 m/s. The engine must exert a force of 7.0 103 N to balance the force that water exerts against the hull. What power does the engine develop? answer:___ kW

*April 26, 2011 by Merlin*

**Physics**

I don't necessarily need an answer here... just a step in the right direction. If you drive into a wall at 5 m/sec, rebound at 1 m/sec, and make contact with the wall for .15 sec, with what force did the wall exert on the car? (mass = 220 kg) I can't really put my finger on it...

*May 27, 2008 by Mark*

**how to sketch a graph of..**

Local minimum and local maximum imply that the function approaches negative and positive infinite at opposite sides of the graph. Local minimum (1,1) and local maximum (3,3) means the slope of the function is 0 at these points. Thank you so much. So 1)when the local minima is...

*November 5, 2006 by Leo*

**Science**

What is the magnitude of the charge on two identical spheres that exert a force of 0.300 N when 75.0 apart?

*January 25, 2010 by Michael*

**physics**

How much force does an 60 kg astronaut exert on his chair while accelerating straight up at 8m/s squared?

*June 21, 2011 by Kate*

**physics**

How much force does an 60 kg astronaut exert on his chair while accelerating straight up at 8m/s squared?

*June 21, 2011 by Kate*

**physics**

if you exert a force of 500N to walk 4M up a flight of stairs in 4S , how much power do you use?

*December 17, 2011 by ghada*

**physics**

how much torque do you exert if you push perpendicularly on a door with a force of 30 N at a distance of 0.85 m from its hinges

*April 28, 2012 by Anonymous*

**physics**

what force must the woman in Figure 3.38 exert on the floor with her hands in order to do a pushup?

*April 29, 2012 by Anonymous*

**math**

A plane flying a its maximum speed can go 200 miles per hour with a tailwind and 160 miles per hour into a head wind. a) What is the wind speed? b) What would the maximum speed of the plane be if there was no wind?

*March 31, 2016 by Stormi*

**physics**

A tennis ball of mass 0.057 kg is served. It strikes the ground with a velocity of 54 m/s (120 mph) at an angle of 21° below the horizontal. Just after the bounce it is moving at 51 m/s at an angle of 19° above the horizontal. If the interaction with the ground lasts 0.064 s...

*August 2, 2011 by Ashley*

**physics**

A constant force is exerted for a short time interval on a cart that is initially at rest on an air track. This force gives the cart a certain final speed. Suppose we repeat the experiment but, instead of starting from rest, the cart is already moving with constant speed in ...

*January 29, 2013 by Kristal*

**Physics**

Suppose your car was mired deeply in the mud and you wanted to use the method illustrated in the figure to pull it out. (a) What force in newtons would you have to exert perpendicular to the center of a rope to produce a force of 10,000 N on the car if the angle is 1.80°? ...

*November 7, 2016 by Sara*

**college physics 1**

As part of a fundraiser, the Chancellor has agreed to bungee jump from a crane 45 m above a pool filled with Jello. The plan is for the bungee cord to stop the Chancellor just before his head enters the Jello. Your task is to select a bungee cord that will safely stop the ...

*February 12, 2015 by somoan*

**Physics**

A 400.0 KG mass experiences a horizontal push force of +720N And friction force of 320N A) assuming the mass is initially moving at 5.0 m/s far will it travel in 6.0 s? B) how much work does the 720.0 newton force do over the distance determine in part a? C) calculate the ...

*October 20, 2015 by Anonymous*

**maths,science, physics**

A block of mass 50kg was left to slide down a ramp elevated at an angle of 45 decrease as shown in the diagram below (assume g=9.8 ms^-2). I . Calculate the net force causing the block to slide down the ramp (assume no friction) II. Calculate the net force causing the block to...

*June 5, 2016 by Oxy*

**Math(Please help)**

Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=-16t^2+50t+6 b) How long is the ball in the air? ...

*April 16, 2010 by Abbey*

**Physics help**

A car travels in a circle whose radius is 31 m, with a speed of 19 m/s. (1) What is the magnitude of the car's acceleration? _____ m/s2 (2) What is the nature (origin) of the horizontal force on the car? (What is exerting the force?) The force causing the car to turn is: ...

*October 28, 2012 by arcos15*

**physics134**

A ball, with a mass of 0.144 kg, is thrown from the top of a 76.8 m building (point A) at an angle, θ = 65º with respect to the horizontal. The initial speed of the ball is unknown. The ball reaches a maximum height of 12 m above the building after which it hits the ...

*May 4, 2013 by Anonymous*

**Math**

This is for grade 11 math, under quadratic extrema and roots. Fred and Ginger have 24 m of fencing to enclose a garden at the back of their house. From the pictures you can see (shows a large rectangle for the house, with a smaller one attached on the bottom line, to the right...

*November 1, 2007 by Laura*

**physics**

A.A pair of narrow, parallel slits separated by a distance of 0.335 mm are illuminated by green laser light with wavelength = 543.0 nm. The interference pattern is observed on a screen 2.43 m from the plane of the parallel slits. Calculate the distance from the central maximum...

*March 21, 2010 by Andy*

**Algebra 2 HELP plz**

An object is launched upward with an initial velocity of 64 feet per second from a platform 80 feet high. 1.) Write a height model for the object. I wrote my model as .... h=-16t^2 +64t +80 2.) How many seconds until the maximum height is reached? I had 2 seconds as my answer ...

*November 12, 2014 by kylie*

**Physics**

A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 100.0 N at an angle of 25.0° above the horizontal. The box has a mass of 25.0 kg, and the coefficient of kinetic friction between box and floor...

*September 22, 2008 by Jenny*

**physics**

A ping pong ball (m= 6g) bounces off a table. Before striking the table the ball has a velocity of 4m/s in a direction pheta below the x-axis. It leaves the table with the same speed moving in a direction pheta above the x axis. What impulse does the table exert on the tennis ...

*October 22, 2007 by Anonymous*

**math**

A cable company charges $40 plus $12 for each cable jack. If x is the number of jacks installed, the linear equation is C=12x+40. graph the total

*February 20, 2013 by phil*

**physics**

a 3 m long weightless beam is supported at each end by cables. a painter weighing 90 N stands 1 m from the left cable. Calculate the tension in each cable.

*March 20, 2013 by markcampo*

**Physics**

Mass 1 and mass 2 are connected as shown by a massless, non-stretch rope that passes over a massless, frictionless pulley. The masses are on inclines which have friction. When the angles of the string are as given, mass 1 experiences an acceleration up the incline of 1.00 m/s/...

*July 25, 2012 by Zac*

**Physics**

An electron of mass 9.11 10-31 kg has an initial speed of 2.60 105 m/s. It travels in a straight line, and its speed increases to 6.00 105 m/s in a distance of 4.40 cm. Assume its acceleration is constant. (a) Determine the magnitude of the force exerted on the electron. ...N...

*October 2, 2016 by Jack*

**theory of machine**

1. the contact ratio is....... (a)zero (b)more than one (c)less than one (d)none of these 2. the ratio of maximum displacement of the forced vibration to the deflection due to the static force is known as................ (a)damping factor (b)magnification factor (c)damping ...

*August 1, 2012 by raju*

**College Chemistry**

The sun bombards the earth with about 1KJ m^-2s^-1. Calculate the maximum mass of pure ethanol that can be vaporized in 10 min from a beaker left in strong sunshine, assuming the surface area of the ethanol t be 50cm^2.

*August 15, 2012 by James*

**physics**

Could anyone help me set up this equation? I drew my force body diagram but wasn't sure how to include the downward force (im assuming i use either sine or cosine?) A force of 340 N pushes a 54 kg object. Find the acceleration of the box if the force makes an angle of 70 ...

*October 3, 2014 by xxhennessy*

**Physics**

A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 189.0 N at an angle of 30.0◦ with the horizontal. The box has a mass of 39.0 kg, and the coefficient of kinetic friction between the box and floor is 0....

*November 11, 2014 by Shanii*

**Science**

The same force acts on two objects with different masses. Why does the object with less mass have a larger acceleration?

*September 10, 2008 by Stacy*

**biomechanics**

If a soccor ball with a mass of 0.43 kg is kicked while it is in the air, with a force of 15 N oriented 32 degrees above the horizontal, what is the resultant acceleration?

*April 8, 2011 by katie*

**Physics**

A motorcycle with a mass of 350 kg is accelerated from rest to a velocity of 30 m/s by a force of 4000 N. calculate the distance over which this acceleration occurred.

*April 19, 2011 by helpp*

**Physics**

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 45 N·m. Using the data in the drawing, determine the magnitude F of the force that you must exert on the wrench. Lenght of the wrench is .28 m ...

*March 24, 2008 by Zach*

**physics**

what is the maximum speed with which a 1050kg car can round a turn of radius 70 m on a flat road if the coefficient of friction between tires and road is .80? is this result independent of the mass of the car?

*January 2, 2011 by Jessie*

**chemistry**

since 1991, house paint produced in Canada must contain no more than 600 ppm of lead. What is the maximum mass of lead permitted ion a 2.50 kg can of paint?

*December 15, 2014 by GEORGE`*

**physics**

1. How much acceleration does a 747 jumbo jet of mass 31600 kg experience in takeoff when the thrust for each of four engines is 30000 N? 2. Two boxes are seen to accelerate at the same rate when a force F is applied to the first and 5F is applied to second. What is the mass ...

*November 22, 2010 by confused*

**physics**

A 100kg mass starts from rest at the top of an incline plane that makes an angle of 35 degrees with the horizontal, the coefficient of friction of 0.005 between the ramp and the mass. The mass slides down the ramp and then slides to a stop on a surface with coefficient of ...

*May 6, 2010 by Ariel*

**physics**

A 100kg mass starts from rest at the top of an incline plane that makes an angle of 35 degrees with the horizontal, the coefficient of friction of 0.005 between the ramp and the mass. The mass slides down the ramp and then slides to a stop on a surface with coefficient of ...

*May 6, 2010 by Ariel*

**algebra 2**

The height of an arrow shot in the air is given by the function h(t)=-16t^2+144t+24, where h(t) represents the height in feet, and t represents the time in seconds. what is the maximum height of the arrow? how long does it take to reach the maximum height? how long does it ...

*June 16, 2014 by Anonymous*

**Static Equilibrium**

This has been causing me some pain. An 89.03 kg person is half way up a uniform ladder of length 3.453 m and mass 22.75 kg that is leaning against a wall. The angle between the ladder and the wall is θ. The coefficient of static friction between the ladder and the floor ...

*November 6, 2014 by Rhyan*

**physics mechanics**

A 2 kg mass rests on a horizontal table with a light spring with a force constant of 200 Nm-1 attached to it. The coefficient of static friction between the mass and the table is 0.7 and the coefficient of kinetic friction is 0.5. How far must the spring be stretched ...

*October 26, 2013 by njood*

**Physics**

1) Planet Zero has a mass of 5.0*10^23 kg and a radius of 2.0*10^6 meters. What is the acceleration of gravity on planet zero? 2)Phobos, a satellite of Mars, has a radius of 11km and a mass of 10^16 kg. Its a bit lumpy, but let's assume its spherical to get a doable problem. (...

*December 6, 2014 by Charlie*

**physics**

The problem propmpts us with the info: "Two friends play with a card-board box on a grassy hill side. The boy in the box has a mass of 50.0 kg and the box has a mass of 5.00 kg. The incline of the hill is 44° and its height is 10 meter. Assume that friction plays a negligible...

*October 11, 2015 by ana*

**Geometry**

Hi, one Professor gave me a very hard question, He has a little Disk (used in machines) that has a big hole in the middle, he measured the thickness every 90°, and he got the following measurements: 0.95 mm 1.02 mm 1.02 mm 0.96 mm He tells me that with 3 of these measurements...

*May 26, 2009 by Alessio*

**Geometry**

Hi, one Professor gave me a very hard question, He has a little Disk (used in machines) that has a big hole in the middle, he measured the thickness every 90°, and he got the following measurements: 0.95 mm 1.02 mm 1.02 mm 0.96 mm He tells me that with 3 of these measurements...

*May 27, 2009 by Alessio*

**physics**

Jennifer, who has a mass of 50.0 kg, is riding at 35.0 m/s in her red sports car when she must suddenly slam on the brakes to avoid hitting a deer crossing the road. She strikes the air bag that brings her body to a stop in 0.500 s. What average force does the seat belt exert ...

*December 3, 2012 by Chelsey Achord*

**Ap physics**

A person pushes a 15.0 kg lawn mower at constant speed with a force of 77.0 N directed along the handle, which is at an angle of θ = 49.0° to the horizontal . (a) Draw the free-body diagram showing all forces acting on the mower. (Do this on paper. Your instructor may ...

*September 10, 2010 by rayray*