Friday

August 26, 2016
Number of results: 167,996

**physics**

a worker lays a rubber handled 0.500kg hammer down a sloped roof. it slides down the roof to a level portion of the roof where it slides another 2.oo m long this horizontal surface. the coefficient of friction between the rubber handle and the shingles is 0.850 a)draw free ...
*January 12, 2013 by teed*

**physics**

An 70.0 N box of clothes is pulled 24.0 m up a 30.0° ramp by a force of 115 N that points along the ramp. If the coefficient of kinetic friction between the box and ramp is 0.22, calculate the change in the box's kinetic energy.
*December 2, 2010 by Bailey*

**Physics**

An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
*October 11, 2012 by Angela*

**Physics**

An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
*October 11, 2012 by Angela*

**physics**

An 66.0 N box of clothes is pulled 5.5 m up a 30.0° ramp by a force of 116 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
*May 29, 2014 by Anonymous*

**physics**

An 56.0 N box of clothes is pulled 5.2 m up a 30.0° ramp by a force of 104 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy. J
*December 11, 2014 by Anonymous*

**physics**

An 56.0 N box of clothes is pulled 5.2 m up a 30.0° ramp by a force of 104 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
*December 11, 2014 by Anonymous*

**Physics**

A mass m1 on a horizontal shelf is attached by a thin string that passes over a frictionless pulley to a 2.5 kg mass (m2) that hangs over the side of the shelf 1.2 m above the ground. The system is released from rest at t = 0 and the 2.5 kg mass strikes the ground at t = 0.82 ...
*February 26, 2012 by J*

**Physics**

In the figure, a 52 kg rock climber is climbing a “chimney” between two rock slabs. The coefficient of static friction between her shoes and the rock is 1.20; between her back and the rock it is 0.707. She has reduced her push against the rock until her back and her shoes are ...
*October 24, 2014 by Anja*

**college physics**

In the figure below, two particles, each with mass m = 0.82 kg, are fastened to each other, and to a rotation axis at O, by two thin rods, each with length d = 10 cm and mass M = 2.0 kg. The combination rotates around the rotation axis with angular speed ù = 0.34 rad/s. (a) ...
*December 1, 2009 by Ryan*

**physics**

Two blocks of equal masses are connected by a string. Block 1 is pulled by a force of 30 N which accelerates both blocks at 3 m/s2 along a surface of negligible friction A) find the masses of each block B) find the tension
*January 26, 2015 by Thikha*

**Physics**

A block of mass m_1 is connected by a string over a pulley to a block of mass m_2 that is sliding on a flat table. The string is light and does not stretch; the pulley is light and turns without friction. The coefficient of friction between the sliding block and the table is...
*October 1, 2010 by Anonymous*

**Physics**

A crate with a total mass of 18.0 kg is pulled by a person along the floor at a constant speed by a rope. The rope is inclined at 20 degree above the horizontal, and the crate moves 20.0 m on a horizontal surface. The coefficient of kinetic friction between the floor and the ...
*August 8, 2013 by Anonymous*

**physics**

A 4.90 kg particle moves along the x axis. Its position varies with time according to x = t + 3.4t3, where x is in meters and t is in seconds. (a) Find the kinetic energy at any time t. (Accurately round any coefficient to exactly two decimal places. Use t as necessary.) K...
*November 14, 2011 by carlton*

**Physics **

A box is pushed down an incline from point A to point B by a force F (and also under the influence of its weight). The distance from A to B, along the ramp, is 5.0 m. The force F is parallel to the incline, as shown, and has a magnitude of 2.0 N. The force of kinetic friction ...
*May 30, 2014 by Abby*

**Physics**

A ring (hollow cylinder) of mass 2.89kg, inner radius 5.35cm, and outer radius 6.35cm rolls (without slipping) up an inclined plane that makes an angle of θ=35.6°, as shown in the figure below. At the moment the ring is at position x = 1.87m up the plane, its speed is 2....
*July 4, 2016 by Tim*

**Physics**

A ring (hollow cylinder) of mass 2.89kg, inner radius 5.35cm, and outer radius 6.35cm rolls (without slipping) up an inclined plane that makes an angle of θ=35.6°, as shown in the figure below. At the moment the ring is at position x = 1.87m up the plane, its speed is 2....
*July 5, 2016 by Andrea*

**physics**

A father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10 m, as illustrated below. If the total mass of the sled and the girl is 35 kg and the coefficient of kinetic friction between the sled runners and the snow is 0.20, ...
*April 11, 2010 by Anonymous*

**Spring Physics**

A 2.0 kg box rests on a plank that is inclined at an angle of 65° above the horizontal. The upper end of the box is attached to a spring with a force constant of 19 N/m, as shown in Figure 6-32. If the coefficient of static friction between the box and the plank is 0.21, what ...
*November 4, 2009 by Stefanie*

**physics**

determine the acceleration of a 25 kg crate being dragged across a floor by a 150 N force at a 42 degree angle above the floor where the kinetic coefficient of friction is .52.
*April 23, 2012 by Syd*

**Physics Dynamics**

A 5.0-kg box is pulled horizontally with a 45-N force that makes angle of 40 degree with the horizontal. The coefficient of kinetic friction of the surface is 0.20. What is the magnitude of the acceleration of the box?
*February 8, 2015 by Anonymous*

**science**

A 10-kg box is pulled along a horizontal surface by a force of 40N applied at a 30° angle above horizontal. The coefficient of kinetic friction is 0.3. Calculate the acceleration.
*October 26, 2015 by mustafa*

**physics**

A 5.4 kg wagon is pulled along a horizontal surface. The acceleration of the object is 0.9 m/s^2. What is the coefficient of friction between the surfaces? Any help is much appreciated! I am not sure how to go about the problem other than I think I must use the Fn (normal ...
*December 29, 2010 by Jenni*

**Physics**

A brick of mass 1.0 kg slides down an icy roof inclined at 30.0 degrees with respect to the horizontal. (a) If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 2.00 m away? Ignore friction. (b) Redo part (a) if the coefficient of kinetic ...
*March 26, 2011 by Anonymous*

**Physics**

A brick of mass 1.0 kg slides down an icy roof inclined at 30.0 degrees with respect to the horizontal. (a) If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 2.00 m away? Ignore friction. (b) Redo part (a) if the coefficient of kinetic ...
*March 26, 2011 by Physics*

**another physics problem that i dont understnad..**

An 58.0 N box of clothes is pulled 5.2 m up a 30.0° ramp by a force of 95 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
*April 15, 2010 by brittany*

**physics**

Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as in Figure 7.10, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic frictional forces ...
*October 15, 2011 by riley*

**physics**

what is the greatest acceleration can be generated by a runner if coefficient of friction between shoes and road is 0.95
*February 17, 2012 by momi*

**College physics-oscillations**

A ball is attached by two spring as shown [vvvOvvv]. If the mass is displaced a distance â–³x BELOW the equilibrium position h (see figure A). Determine whether vertical SHM is possible for the system shown.If so, find the natural frequency. [Assume that the vertical extension...
*December 4, 2010 by Marco*

**Physics ASAP**

A block of weight 20 N is pushed with a force of 30 N through a horizontal distance of 5 m using a stick which is at an angle of 37° from the horizontal as shown. The coefficient of kinetic friction µk between the table and the block is 0.25. For your own reference, draw a ...
*December 10, 2012 by Sierra*

**physics**

Persons A and B are standing on a board of uniform linear density that is balanced on two supports, as shown in the figure. What is the maximum distance x from the right end of the board at which person A can stand without tipping the board? Treat persons A and B as point ...
*April 10, 2011 by I need help*

**physics**

In the figure below, a slide loving pig slides down a certain 18° slide in twice the time it would take to slide down a frictionless 18° slide. What is the coefficient of kinetic friction between the pig and the slide? Explanation would be helpful.
*September 23, 2009 by Nick*

**Math**

A 6.4 ton military fighter must land on a flight strip. If the plane lands at a speed of 368 mph, and the coefficient of kinetic friction is 0.72 between the wheels and the ground. If the runway must be at least 150% as long as the shortest possible landing distance of the ...
*June 2, 2009 by Chelsea*

**physics**

4. Two masses of 3 kg and 5 kg collide head-on, the former moving to the right with the speed 5 m/s and the latter moving to the left with the speed 3 m/s.After collision they stick together. What amount of mechanical energy is lost? 5. A cylinder with a uniform density is ...
*May 24, 2010 by ray*

**High School Physics**

Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000 acting on its torso when it hit the ground. Assuming the torso has a mass of 3800 kg, find the magnitude of the torso's upward acceleration as...
*September 23, 2009 by Mia*

**Math**

Two particles X and Y joined by a rigit rod of negligible mass, move along a smooth horizontal plane. Particle X has mass 7.7kg and is pushed by an external force Fx of magnitude 73.01N. Particle Y has mass 5.68kg and is pulled along the plane by an external force Fy of ...
*September 7, 2012 by Anonymous*

**Physic**

Ok so this question was posted before but I'm confused by the answer. The problem is: The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in Figure 10-23 are released from rest, with m1 at a height of 0.87 m above the floor. When m1 hits the ground its ...
*March 8, 2010 by Kelsey*

**physics**

A 90 kg box is pushed by a horizontal force F at constant speed up a ramp inclined at 28°, as shown. Determine the magnitude of the applied force. when the ramp is frictionless. when the coefficient of kinetic friction is 0.18.
*June 25, 2014 by Anonymous*

**Physics**

A toboggan approaches a snowy hill moving at 11.1 m/s . The coefficients of static and kinetic friction between the snow and the toboggan are 0.410 and 0.280, respectively, and the hill slopes upward at 42.0 ∘ above the horizontal. A)Find the acceleration of the toboggan...
*February 14, 2016 by Samantha*

**physics**

Consider two frictionless inclined planes with the same vertical height. Plane 1 makes an angle of 25.0 degree with the horizontal, and plane 2 makes an angle of 55.0 degree with the horizontal. Mass m_1 is placed at the top of plane 1, and mass m_2 is placed at the top of ...
*February 22, 2011 by andrea*

**physics**

A 3.00 kg block starts from rest at the top of a 33.0° incline and slides 2.00 m down the incline in 1.75 s. Find the coefficient of kinetic friction between the block and the incline
*October 22, 2011 by Johnna*

**Physics**

A student on a piano stool rotates freely with an angular speed of 2.85rev/s . The student holds a 1.10kg mass in each outstretched arm, 0.789m from the axis of rotation. The combined moment of inertia of the student and the stool, ignoring the two masses, is 5.23kg⋅m2...
*November 7, 2013 by Patricia*

**Physics**

A 2.3 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.65 m/s. The incline is 1.6 m long. What is the coefficient of friction?
*December 20, 2012 by Mat*

**physics**

A triple beam balance, like the scales we use every week in lab, works using rotational equilibrium. If a 253 g mass is placed on the pan, 1 cm from the pivot, and there are three masses, 1 g, 10 g, and 50 g masses on the other side can be slid back and forth between 0 cm and ...
*October 18, 2014 by John*

**Re: Physics/Math**

A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the right.) Calculate the...
*February 10, 2007 by COFFEE*

**Physics(IMPORTANT)**

An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position. The forces acting to stop the airliner arise from friction due to the wheels and from the breaking effort of the engines in reverse thrust mode. The ...
*November 1, 2013 by keitanako*

**math**

A block of mass M1 = 2.7 kg rests on top of a second block of mass M2 = 4.7 kg, and the second block sits on a surface that is so slippery that the friction can be assumed to be zero (see the figure below). (a) If the coefficient of static friction between the blocks is ¦ÌS = ...
*August 28, 2013 by Hei*

**Physics**

A transport plane takes off from a level landing field with two gliders in tow, one behind the other. The mass of each glider is 700 {kg}, and the total resistance (air drag plus friction with the runway) on each may be assumed constant and equal to 2100N . The tension in the ...
*March 12, 2013 by Gareth*

**physic**

An object of mass m is at rest at the top of a smooth slope of height h and length L. The coefficient of kinetic friction between the object and the surface, μk, is small enough that the object will slide down the slope if given a very small push to get it started. Find ...
*October 23, 2014 by physic ----please help*

**physics**

A 10 kg mass is sitting on a 25 degree incline. A constant force of 49N is applied up the plane. The coefficient of static friction is .25. Does it go up or down or does it stay put?
*February 19, 2013 by Aaron*

**physics**

A box with a mass of 40.0 kg is pulled along a level floor at a constant speed by a rope that makes an angle of 20.0o with the floor as shown below. If the force on the rope is 200 N, then coefficient of sliding friction or ) between the box and the floor is: a) 0.58 b) 0.48 c...
*January 20, 2011 by Anonymous*

**Physics**

A block of mass m1 = 22.0 kg is connected to a block of mass m2 = 40.0 kg by a massless string that passes over a light, frictionless pulley. The 40.0-kg block is connected to a spring that has negligible mass and a force constant of k = 260 N/m as shown in the figure below. ...
*March 12, 2013 by Anonymous*

**Physics **

A skier of mass 64 kg starts from rest at the top of an 18° slope, points her skis straight down the slope and lets gravity pull her down the slope. The slope is 65 m long. Her speed at the bottom is 15 m/s. (a) Assuming zero air resistance, what is the magnitude of the ...
*May 25, 2010 by MD*

**PHysics!!**

Starting from rest at a height equal to the radius of the circular track, a block of mass 25 kg slides down a quarter circular track under the influence of gravity with friction present (of coefficient μ). The radius of the track is 15 m. The acceleration of gravity is 9....
*May 8, 2012 by Bob*

**Physics - KE/inertia**

The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm)consists of three particles ...
*March 27, 2007 by COFFEE*

**Physics**

Two packing crates of masses m1 = 10.0 kg and m2 = 4.10 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 4.10-kg crate lies on a smooth incline of angle 33.0°. (a) Find the acceleration of the 4.10-kg crate. (b) Find the tension ...
*September 30, 2012 by Cora*

**Physics please help**

Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the normal force?
*October 12, 2011 by Dee*

**Physics**

A coefficient of kinetic friction, k , is needed to stop a car in a distance D on dry pavement with the wheels locked if the car starts from speed V_0. What coefficient of kinetic friction (in terms of k ) is needed to stop this car in the same distance if it starts from an ...
*February 19, 2008 by Jose*

**SCIENCE: CONNEXUS HELP!**

Lesson 12: Energy Unit test Unit 3:Energy 1.The diver has the least gravitational potential energy at position A-1 B-2 C-3 D-4 2. Two identical masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass ...
*May 13, 2015 by MM*

**physics**

A block is at rest on the incline shown in the figure. The coefficients of static and ki- netic friction are μs = 0.45 and μk = 0.38, respectively. The acceleration of gravity is 9.8 m/s2 . What is the frictional force acting on the 25 kg mass? Answer in units of N ...
*October 1, 2013 by Anonymous*

**physics**

A freight company uses a compressed spring to shoot 2.00 kg packages up a 1.00-m -high frictionless ramp into a truck, as the figure shows. The spring constant is 481 N/m and the spring is compressed 30.0 cm . A. What is the speed of the package when it reaches the truck? B. A...
*November 13, 2010 by Anonymous*

**Physics HELP!**

A block of mass 3 kg slides along a horizontal surface while a 20-N force is applied to it at an angle of 25°. If needed, use g = 10 m/s2. For a coefficient of kinetic friction of 0.3 between the block and the surface, the frictional force acting on the block is most nearly 9 ...
*May 25, 2012 by Ashley*

**physics**

You and your friend are sledding on two sides of a triangle-shaped hill. On your side, the hill slopes up at 30.0° from the horizontal; on your friend's side, it slopes down at the same angle. You do not want to climb up the hill, so you tell your friend to thread a rope ...
*September 15, 2011 by Anonymous*

**physics**

A ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?
*March 19, 2011 by laila*

**physics**

ball of mass m = 0.2 kg is attached to a (massless) string of length L = 3 m and is undergoing circular motion in the horizontal plane, as shown in the figure. What should the speed of the mass be for θ to be 46°? What is the tension in the string?
*March 20, 2011 by Anonymous*

**College physics-oscillations**

A ball is attached by two spring as shown [vvvOvvv]. If the mass is displaced a distance â–³x BELOW the equilibrium position h (see figure A). Determine whether vertical SHM is possible for the system shown.If so, find the natural frequency. [Assume that the vertical extension...
*December 4, 2010 by Marco*

**physics**

Physics force of friction question a shuffle board disk is accelerated to a speed of 5.8m/s and released. if the coefficient of the kinetic friction between the disk and the concrete court is 0.3, how far does the disk go before it comes to a stop?The courts are 15.8meters long
*March 28, 2010 by jake*

**Physics**

4830J of work is done by a laborer pulling a 27.0 kg crate across a cement floor at a constant speed of 7.82 m/s by a 454 N force. The rope is being pulled at a 37.0 degree angle to the floor. a)How far was it pulled? b)What is the friction force? c)What is the work done ...
*November 28, 2014 by Brie*

**Physics**

Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the normal force?
*October 12, 2011 by Dee*

**Physics**

Starting from rest, a 5.00 kg block slides 2.50 m down a rough 30.0 degree incline. The coefficient of kinetic friction between block and the incline is .436. Determine the work done by the friction force between block and incline and the work done on the normal force
*October 13, 2011 by Dee*

**Physics**

A hardworking ant must supply 0.00955 N to pull a small piece of fruit at constant velocity over a distance of 8.60 cm up a small hill to the entrance of the colony. If the coefficient of kinetic friction between the piece of fruit and the 16.2° sloped hill is 0.540, calculate...
*November 4, 2013 by Anonymous*

**physics**

A body of mass 5.0kg slides from rest down a plane inclined at 30degrees to the horizontal. After sliding 12m down the plane it is found to have a speed of 10m/s. a) How much work has been done in overcoming friction along the plane? b) Calculate the average value of the force...
*June 13, 2012 by sand*

**Physics**

4.82 kJ work is done by a worker pulling a crate across the deck of a ship at a constant speed of 7.82 m/s by a 453 N force. The rope is being pulled at a 37.0 degree angle to the deck. a)How far was it pulled? b)What is the friction force? c)What is the work done against ...
*November 26, 2014 by Brad*

**Physics**

A crate with a mass of 40 kg is being dragged along a horizontal floor at a constant velocity by an applied force of 180 N. What is the coefficient of kinetic friction? (g = 10 m/s2
*November 9, 2012 by Joshua*

**physics**

A stewardess pulls her 70 N flight bag a distance of 200 m along an airport floor at constant speed. The force she exerts is 40 N at an angle of 50 degrees above the horizontal. Find (a) the work she does, (b) the work done by the force of friction, and (c) the coefficient of ...
*October 22, 2007 by Anonymous*

**physics **

the 5.0 kilogram block shown below is accelerated from rest across a wood floor (coefficient kinetic friction 0.22) by a 40 N pulling force for 3.0 seconds What us the blocks final velocity/speed? I am not sure what force i am supposed to calculate??
*October 25, 2014 by Sanda*

**Physics, newtons laws**

A 50kg block is being pulled up a 13 degree slope by a force directed 30 degrees above the slope. The coeffcienct of kinetic friction between the block and the slope is 0.200. What is the minimum force required for the block to continue to slide up the plane with no ...
*October 29, 2012 by Naf*

**Physics, newtons laws**

A 50kg block is being pulled up a 13 degree slope by a force directed 30 degrees above the slope.? The coeffcienct of kinetic friction between the block and the slope is 0.200. What is the minimum force required for the block to continue to slide up the plane with no ...
*October 29, 2012 by naf*

**Ff**

The coefficient of static friction between the m = 3.50 kg crate and the 35.0° incline of Figure P4.41 is 0.340. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline? Your response differs from the ...
*March 1, 2012 by Avery *

**physics**

If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at 25.7 ?
*February 25, 2012 by Jack*

**physics**

If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at 25.6m/s ?
*April 27, 2015 by Alkhanssa*

**Physics**

You and your friend are sledding on two sides of a triangle-shaped hill. On your side, the hill slopes up at 30.0° from the horizontal; on your friend's side, it slopes down at the same angle. You do not want to climb up the hill, so you tell your friend to thread a rope ...
*June 7, 2015 by Nguyen Ha*

**Physics**

You and your friend are sledding on two sides of a triangle-shaped hill. On your side, the hill slopes up at 30.0° from the horizontal; on your friend's side, it slopes down at the same angle. You do not want to climb up the hill, so you tell your friend to thread a rope ...
*June 7, 2015 by Average*

**Physic ~ pls help**

A heavy conductor (mass m, length `, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field ~B is now imposed. The acceleration of gravity is 9.8 m/s2 . Which ...
*April 15, 2011 by cr*

**physics**

a box of mass 10kg is at rest on a horizontal plane.a force of 20N is applied to it at 30 degrees to the plane.assuming there no frictional force between the box and the plane,calculate the acceleration of the box.
*March 11, 2016 by Misheck*

**Physics 12**

A block mass m1 lying on a frictionless inclined plane is connected to a mass m2 by a massless cord passing over a pulley. 1.) determine a formula for the acceleration of the system in terms of m1, m2, Ө, and g. 2.)what conditions apply to mass m1 and m2 for the ...
*February 26, 2012 by Anon*

**Physics**

A 2.19 kg block is held in equilibrium on an incline of angle q = 55.0o by a horizontal force, F, applied in the direction shown in the figure below. If the coefficient of static friction between block and incline is ms = 0.283, determine the minimum value of F. Determine the ...
*February 3, 2016 by Weeks*

**phy**

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*January 28, 2013 by christ*

**physics**

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*February 12, 2014 by nandeve*

**physics**

I need help understanding these, please. Thanks! 1. A 2 kg body moves with constant velocity when a force of 10 N is applied. What is the coefficient of kinetic friction between the table and the body? (Would I use F=m*g for this??) 2. Which of the following statements is ...
*October 4, 2015 by Ellie*

**Algebra**

Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help me
*February 24, 2010 by Meghan*

**Algebra**

Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help me
*February 24, 2010 by Meghan*

**physics**

A block is pressed against a vertical wall by a force , as the drawing shows. This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The magnitude of the force is different in the two cases, while the ...
*June 30, 2013 by bill*

**physics**

In the 1950s, an experimental train that had a mass of 3.30 104 kg was powered across level track by a jet engine that produced a thrust of 4.90 105 N for a distance of 600 m. (a) Find the work done on the train. 1 J (b) Find the change in kinetic energy. 2 J (c) Find the ...
*May 10, 2012 by dan*

**physics**

Two packing crates of masses m1 = 10.0 kg and m2 = 4.40 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 4.40-kg crate lies on a smooth incline of angle 41.0°. find the acceleration of the 4.4kg crate find the tension in the string
*September 28, 2011 by Anonymous*

**Physics**

Two packing crates of masses 7.93 kg and 5.13 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 5.13 kg crate lies on a smooth incline of angle 40.0°. a) Find the acceleration of the 5.13 kg crate (b) find the tension in the ...
*September 30, 2012 by Anonymous*

**physics**

Two packing crates of masses 10.89 kg and 2.59 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 2.59 kg crate lies on a smooth incline of angle 40.0°. a) Find the acceleration of the 2.59 kg crate B) find tension in the string
*October 4, 2012 by lib*

**Physics**

Large boxes of pumpkins are set on a ramp to be unloaded out of a truck. The 300.0 lb boxes are set on the ramp which has an incline of 35 degrees. They must then be pushed to get started down the plane towards the bottom. If the coefficient of the static friction between the ...
*September 4, 2012 by Karla*

**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*

**physcis **

What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.82?
*May 7, 2012 by ericka*