Saturday

January 21, 2017
Number of results: 76,843

**Physics**

While moving in, a new homeowner is pushing a box across the floor at a constant velocity. The coefficient of kinetic friction between the box and the floor is 0.27. The pushing force is directed downward at an angle θ below the horizontal. When θ is greater than a ...

*October 13, 2014 by Anonymous*

**physics help grade11**

In a physics laboratory experiment, a 6.00 kg box is pushed across a flat table by a horizontal force F. A. If the box is moving at a constant speed of 0.35 m/s and the coefficient of friction is 0.12. What is the magnitude of F? B. What is the magnitude of F if the box is ...

*May 18, 2016 by jyne*

**Physics**

A man pulls a 50 kg box with an acceleration of 2m/s^2 across the floor. He applies a 200 N force at an angle of 30 degrees what is the coefficient of the kinetic friction?

*December 2, 2012 by Tori*

**physics**

A 2.20 kg box slides down a rough incline plane from a height h of 1.39 m. The box had a speed of 2.77 m/s at the top and a speed of 2.34 m/s at the bottom. Calculate the mechanical energy lost due to friction

*November 21, 2010 by help*

**I guess this is physics related?**

What is the biggest source of error in measuring the acceleration of a ball down a ramp? knowing the length of the ramp accurately measuring the time knowing the height of the ramp knowing the mass of the ball****

*December 29, 2014 by Robert*

**physics**

A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the right as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal acceleration?

*January 19, 2012 by Vicki*

**physics**

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?

*October 8, 2010 by Bolo*

**Physics**

A 45kg block slides down an incline that is angled at 41 degrees. If the coefficient of kinetic friction between the block and the incline is 0.45 what is the block's acceleration?

*February 19, 2014 by Taylor*

**Physics**

A person pushes with a horizontal force of 25 N 4kg block, initially at rest on a horizontal table, a distance of 3m. The coefficient of kinetic friction between the block and table is 0.35. determine external work on the block-table system. the energy dissipated by friction ...

*April 16, 2014 by Star*

**physics**

Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The object m1 is held at rest on the floor, and m2 rests on a fixed incline of θ = 39.0°. The objects are released from rest, ...

*September 28, 2011 by Anonymous*

**Physics**

A 2.00 kg box slides down a rough incline plane from a height h of 1.15 m. The box had a speed of 2.77 m/s at the top and a speed of 2.34 m/s at the bottom. Calculate the mechanical energy lost due to friction (as heat, etc.). (in J)

*December 12, 2015 by Shaxx*

**Physics**

A 10kg suitcase is placed on a horizontal conveyor belt the top of which moves to the right. The coefficient of static friction between the belt and box is µs = 0.5 and that of kinetic friction is µk = 0.3. a) Sketch a free body diagram for the suitcase, showing all forces ...

*March 25, 2015 by Jim*

**Physics Lab**

We have a metal ball and a ramp that we can clamp to the edge of a table. We are supposed to find the coefficient of friction between the ball and the ramp. We think we should use projectile motion and the law of conservation of energy. We don't know what to do with them ...

*November 12, 2010 by Heather*

**Science**

It takes a force of 22 N to push a 10 kg box horizontally with a constant velocity over concrete. What is the coefficient of kinetic friction between the box and the concrete? My guess is 10 kg/22 N = 0.4545 but I'm not sure if you have to take in account vertical forces or if...

*November 30, 2016 by Fred*

**Physics**

A car sits in an entrance ramp to a freeway, waiting for a break in the traffic. The driver sees a small gap between a van and an 18-wheel truck and accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves in a straight line, ...

*July 5, 2011 by Holly*

**physics**

What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.30 and 0.20, respectively.

*March 15, 2010 by norm*

**physics**

What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.35 and 0.25, respectively.

*June 14, 2010 by Anonymous*

**physics**

What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.38 and 0.28, respectively.

*June 7, 2012 by garth*

**physics**

A 55.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300. What horizontal force must be applied to the box for it to start sliding along the surface?

*January 13, 2016 by chyenne*

**physic**

A box of mass 2 Kg lies on a rough horizontal floor with the coefficient of friction between the floor and the box being 0.5 (Figure 3). A light string is attached to the box in order to pull the box across the floor. If the tension in the string is TN, find the value that T ...

*March 25, 2014 by zainab*

**mechanics**

A 2kg box sits at rest on a level floor. Two children push on the box at the same time. Eli pushes horizontally to the right on the box with a force of 4N. Jamie pushes straight downward on the box with a force of 3N. The box does not move (there is friction between the box ...

*July 6, 2014 by juanpro*

**physics**

A box having a mass of 50kg is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must be excerted on the rope to ...

*January 11, 2011 by Elise*

**phsyics**

A box have a mass of 50 Kilograms is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must be exerted on the rope...

*November 25, 2012 by Anonymous*

**physics**

A manager of a restaurant pushes horizontally with a force of magnitude 150 N on a box of melons. The box moves across the floor with a constant acceleration in the same direction as the applied force. Which statement is most accurate concerning the magnitude of the force of ...

*October 9, 2009 by leslie*

**Physics**

A 250N force is applied at an angle of 32 degrees above the horizontal to a 96kg box causing it to slide along a floor. The coefficient of friction between the box and the floor is 0.18. What is the magnitude of the net force on the box? The answer is 67N, I'm just not sure ...

*March 10, 2013 by Julia*

**Physics**

A mover has to move a heavy sofa of mass 146 kg to the second floor of the house. He uses a rope to pull the sofa up a ramp from the first to the second floor. As he pulls the sofa he makes sure that the rope is parallel to the surface of the ramp which is at 30.0° to the ...

*September 27, 2015 by Anna*

**Physics**

Block 1 of mass m1 slides from rest along a frictionless ramp from height h and then collides with stationary block 2, which has mass m2 = 3m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction is μk and comes to a stop in ...

*November 1, 2011 by Isabel*

**Physics**

*I really don't know how to get started. I have done lots of the homework, but this one (and a couple of others) are really giving me PROBLEMS.* A pickup truck is carrying a toolbox, but the rear gate of the truck is missing, so the box will slide out if it is sent moving. The...

*October 1, 2006 by John*

**PHYSICS**

A dock worker is loading a 25 kg solid cylindrical barrel to a ship by rolling it up a 9 meter long and 1.5 meter high ramp. At the top of the ramp the dock worker stop to go around the barrel but he loses the grip and the barrel starts to roll down the ramp without slipping ...

*April 8, 2015 by S*

**physics**

A box is given a push so that it slides across the floor. How far will it go, given the coefficient of kinetic friction is .21 and the push imparts an inital speed of 4.2 m/s?

*September 26, 2009 by Jennifer*

**physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.15 and the push imparts an initial speed of 3.9 m/s?

*October 13, 2009 by DJ*

**physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.17 and the push imparts an initial speed of 4.1 m/s?

*November 19, 2009 by shawn*

**physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.17 and the push imparts an initial speed of 4.3 m/s?

*December 3, 2009 by Kyle*

**physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.17 and the push imparts an initial speed of 4.3 m/s?

*December 3, 2009 by Kyle*

**Physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 3.8 m/s?

*October 14, 2010 by John*

**Physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.16 and the push imparts an initial speed of 4.2 m/s?

*December 20, 2010 by Thao*

**Physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.25 and the push imparts an initial speed of 6.0m/s?

*September 25, 2014 by Whitney*

**physics**

a box is given a push so that it slides across the floor. how far will it go, given that the coefficient of kinetic friction is 0 .2 and the push imparts an initial speed of 4m/s?

*May 3, 2015 by Scar*

**physics**

a box is given a push so that it slides across the floor. how far will it go, given that the coefficient of kinetic friction is 0.2 and the push imparts an initial speed of 4m/s?

*May 3, 2015 by Scar*

**Physics**

A 9.7-kg watermelon and a 7.1-kg pumpkin are attached to each other via a cord that wraps over a pulley, as shown. Friction is negligible everywhere in this system. The angle beneath the pumpkin is 53 degrees and the angle beneath the watermelon is 30 degrees. (a) Find the ...

*October 10, 2010 by Ammora*

**physics**

A 11.0 box is released on a 37 incline and accelerates down the incline at 0.25 .What is the coefficient of kinetic friction?

*October 15, 2010 by Anne*

**Physics**

A box weighting 200N is pushed on a horizontal floor. What acceleration will result if a horizontal force of 100N is applied to the box.? coefficient of friction is 0.4

*May 27, 2013 by silent_klr*

**calculus**

It is desired to design a ski jump ramp. The ramp will be represented by a polynomial whose graph is a side view of the ramp. The ramp must fulfill the following specifications: The ramp begins at a height of 100 feet and ends at a height of 10 feet above the ground. From ...

*October 5, 2015 by Jennifer*

**Vectors - check calculation**

A box is dragged with a force of 115 N up a ramp a distance of 3 m. If the force makes an angle of 35 degrees with the ramp and the ramp makes an angle of 20 degrees with the ground, how much work is done? This is what I have so far: W = F * D * cos Theta =(115) (3) (cos 55...

*May 16, 2010 by Ria*

**Physics**

A wood block with a mass of 100 grams is held at the top of an inclined board (point A in Figure 2). If we assume force of friction (Ff) is 0.35N and constant as the block slides down the ramp, what will the velocity be at point B after the block is released and slides down ...

*January 21, 2011 by Anonymous*

**Physics**

Really need help with this asap plz~ there is a 4kg wooden block on top of a wooden ramp forming an angle of 37 degrees above surface.The block is placed 1.2 m up on the ramp and the ramp is connected to another wooden flat board.So when the block slides down, it continues a ...

*December 8, 2013 by Joanne*

**physics**

A box,is resting on a smooth(frictionless)table.The mass of the box is 10 kg. (a)Determine the weight of the box and the normal force acting on(b)If the box is pushed down with a force of 40 Newton determine the normal force(c) If the box was pulled up with a force of 40 ...

*July 22, 2008 by Jodie*

**physics**

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1- $kg$ block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and the surface is 0.201. ...

*February 20, 2014 by Mimi*

**physics**

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1- kg block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and the surface is 0.201. ...

*February 20, 2014 by Mimi*

**pysics**

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1-kg block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and the surface is 0.201. ...

*February 21, 2014 by Ted*

**11 grade physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 4.2 m/s?

*November 14, 2010 by Cameron*

**Physics**

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.210 and the push imparts an initial speed of 3.50 m/s? (in m)

*February 10, 2015 by Ashley*

**physics**

A wooden box weighing 281 N is pushed across the floor by a workman who exerts a horizontal force of 166 N. If the force of friction between the box and the floor is 21 N, what is the acceleration (in meters/second^2) of the box?

*March 8, 2011 by nm*

**physics**

wooden box weighing 271 N is pushed across the floor by a workman who exerts a horizontal force of 144 N. If the force of friction between the box and the floor is 28 N, what is the acceleration (in meters/second^2) of the box?

*March 1, 2012 by Anonymous*

**physics**

A wooden box weighing 271 N is pushed across the floor by a workman who exerts a horizontal force of 144 N. If the force of friction between the box and the floor is 28 N, what is the acceleration (in meters/second^2) of the box?

*March 7, 2012 by phil*

**physics**

A 5.4 kg block slides down an inclined plane that makes an angle of 38 with the horizontal. Starting from rest, the block slides a distance of 2.5 m in 5.3 s. The acceleration of gravity is 9.81 m/s2 . Find the coefficient of kinetic friction be- tween the block and plane.

*March 14, 2011 by Sara*

**Dynamics of Rigid Bodies**

A 20 kg box is released from rest at point A. It travels down a slope of 35 degrees. If the coefficient of friction is 30%, what will be the velocity of the box 10 meters from point A.

*April 10, 2013 by Anonymous*

**physics**

While you are in detention after school, your teacher tells you to slide a large, 89.7 kilogram box across the floor. The coefficient of static friction (ìstatic) between the box and the floor is 0.50. Compute the force parallel to the ground (F parallel)required to start ...

*January 12, 2015 by Drew*

**PHYSICSSSSS helpppp please**

Two boxes with different masses M1 = 1.8 kg and M2 = 2.6 kg are tied together on a frictionless ramp surface which makes an angle θ = 21° with the horizontal (see the figure below). What is the tension in the rope connecting the two boxes? N What is the tension in the ...

*February 12, 2012 by Anonymous*

**Physics Help..**

A small cube (m=0.290 kg) is at a height of 261 cm up a frictionless track which has a loop of radius, R = 28.71 cm at the bottom. The cube starts from rest and slides freely down the ramp and around the loop. Find the speed of the block when it is at the top of the loop. A ...

*February 12, 2014 by Ron*

**physics**

A couch with a mass of 100 kg is placed on an adjustable ramp attached to a truck. As one end raises, the couch begins to move downward. If it sldes with an acceleration of .79 m/s^2 at 12 degrees, what is the coefficient of kinetic friction. I still am having troubles with ...

*January 20, 2011 by ash*

**Physics**

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight....the angle and normal force

*October 8, 2010 by Bolo*

**Physics**

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight....the angle and normal force

*October 8, 2010 by Bolo*

**Physics**

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight....the angle and normal force

*October 8, 2010 by Bolo*

**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**

The system of blocks shown in the diagram below is being accelerated to the right at 4.4 m/s2 What is the applied force Small box mass- 0.10 kg Big box mass - 0.20 kg Acceleration - 4.4 m/s2 Coefficient kinetic - 0.35

*October 26, 2014 by Sanda*

**physics**

a block slides down a frictionless ramp. at the bottom of the ramp is a vertical circular loop with a radius of 75 cm. from what minimum height does the block need to be released in order to make it around the loop?

*October 12, 2016 by kassy*

**Science**

A 110.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 35.0 deg with the horizontal. Find the magnitude of the applied force F.

*October 26, 2011 by Mark*

**Physics**

Which of the following forces does NOT have a zero work done on the object. Choices The normal force on a box that slides across a horizontal level floor. The weight on a box that slides across a horizontal level floor. The normal force on a box that slides down an inclined ...

*November 11, 2010 by rose*

**Physics**

1)An elevator is moving down with an acceleration of 1.40 m/s^2. A 14.5 kg block hangs from a spring balance fixed to the roof of the elevator. What is the apparent weight of the block? m*g+m*a 14.5*9.80+14.5*1.40 142.1+20.3 162.4 N 2)A 2.7 kg box is released on a horizontal ...

*April 15, 2008 by Jon*

**physics**

3. A wheelchair ramp is to be rated at 8%, which means that it rises 8 cm for every 100 cm of horizontal distance. The height of the ramp is 35 cm. A.What is the length of this ramp? B.What is the angle this ramp makes with the horizontal? C.To what minimum length should the ...

*September 6, 2012 by Mr.T*

**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 coach with a mass of 100 kg is placed on an adjustable ramp attached to a truck. As one end raises, the couch begins to move downward. If it sldes with an acceleration of .79 m/s^2 at 12 degrees, what is the coefficient of kinetic friction. I think I found the normal force, ...

*January 20, 2011 by ash*

**Trigonometry**

The advertisement for a new shoe promises runners less slip. The coefficient of friction (μ) between concrete and a new material used in the sole of this shoe is 1.5. The force of friction that causes slip is equal to mg sinθ, where m is a runner’s mass and g is ...

*June 24, 2010 by Mary*

**Physics**

A wooden block slides directly down an incline plane at a constant velocity of 6 m/s. What is the coefficient of kinetic friction if the plane makes an angle of 30 degrees with the horizontal? the coefficient of kinetic friction = force of kinetic friction/normal force. How ...

*October 10, 2007 by Tammy*

**Physics**

1. The problem statement, all variables and given/known data A student pulls on a box up an incline of 10 degrees. The student pulls with a force of 180 N directed at 30 degrees above the line of the incline. The box has a mass of 28 kg, and the coefficient of friction between...

*October 7, 2007 by Tim*

**physics**

a wooden box weighing 286N is pushed across the floor by a workman who exerts a horizontal force of 143N. If the force of friction between the box and the floor is 28N, what is the acceleration (in meters per second) of the box?

*October 3, 2016 by kassy*

**Physics**

Two boxes on a horizontal surface, as shown in the figure above, are moving together under the influence of a horizontal force, F. The coefficient of kinetic friction between the boxes and the surface is 0.40. Use g = 10 m/s2. In case (a), a horizontal force F directed right ...

*October 10, 2011 by Jeanne*

**Physics please help!!**

A 1.94 kg solid sphere (radius = 0.105 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.710 m high and 5.17 m long. When the sphere reaches the bottom of the ramp, what is its total kinetic energy?

*March 13, 2011 by Megan*

**physics**

a box slides down a smooth inclined plane 30m long and 10m high.determine the speed of the box at the bottom of the plane if it starts from rest at the top.

*July 3, 2011 by Anonymous*

**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*

**pyshics**

8. The coefficient of static friction between a 150-kg box of medical equipment and the floor is 0.35. Would 450-N force applied horizontally be enough to cause the box to move from rest?

*January 18, 2016 by george*

**physics**

8. The coefficient of static friction between a 150-kg box of medical equipment and the floor is 0.35. Would 450-N force applied horizontally be enough to cause the box to move from rest?

*January 18, 2016 by george*

**PLEASE HELP! SCIENCE**

The system of blocks shown in the diagram below is being accelerated to the right at 4.4 m/s2 What is the applied force Small box mass- 0.10 kg Big box mass - 0.20 kg Acceleration - 4.4 m/s2 Coefficient kinetic - 0.35

*October 26, 2014 by Rosie*

**physics repost**

)An elevator is moving down with an acceleration of 1.40 m/s^2. A 14.5 kg block hangs from a spring balance fixed to the roof of the elevator. What is the apparent weight of the block? m*g+m*a 14.5*9.80+14.5*1.40 142.1+20.3 162.4 N 2)A 2.7 kg box is released on a horizontal ...

*April 16, 2008 by Anonymous*

**physics**

A skateboarder starts up a 1.30m high, 25.0° ramp at a speed of 6.70m/s. The skateboard wheels roll without friction. How far from the end of the ramp does the skateboarder touch down?

*May 12, 2015 by Anonymous*

**Physics**

A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp. If the back of the truck is 1.3 above the ground and the ramp is inclined at 30, how much time do the workers have ...

*September 16, 2010 by LP*

**physics**

20.) A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp. If the back of the truck is 1.5 above the ground and the ramp is inclined at 29, how much time do the workers ...

*March 9, 2012 by Anonymous*

**fizk**

3 - A box of mass 2 Kg lies on a rough horizontal floor with the coefficient of friction between the floor and the box being 0.5 (Figure 3). A light string is attached to the box in order to pull the box across the floor. If the tension in the string is TN, find the value that...

*April 30, 2014 by Anonymous*

**Physical science**

i push a 500n box up an inclined plane that is 4 m long and 1.2 m high. what force is applied to push the box up the ramp?

*March 4, 2015 by Kelly*

**physics**

A block of mass 25.5 kg is released on a ramp with an angle of 31.70 degrees. The coefficient of friction is 0.45. Find the acceleration.

*December 3, 2012 by Jared*

**physic**

A stationary 2.0 kg object is located on a table near the surface of the earth. The coefficient static friction between the surface is .80 and the coefficient of the kinetic friction is 0.65. A horizontal force of 5N is applied to the object. Determine the force of friction. ...

*March 27, 2014 by pam*

**physic**

A stationary 2.0 kg object is located on a table near the surface of the earth. The coefficient static friction between the surface is .80 and the coefficient of the kinetic friction is 0.65. A horizontal force of 5N is applied to the object. Determine the force of friction. ...

*March 27, 2014 by pam*

**physics**

My answer for this question A 11.0 kg box is released on a 37 degreesincline and accelerates down the incline at 0.25 m/s^2. What is the coefficient of kinetic friction? My answer was 68.2 and it was incorrect.

*October 15, 2010 by Anne*

**physics**

Joe pushes horizontally on a heavy box across a rough surface at constant speed. Which one of the following statements concerning this situation is false? If Joe stops pushing on the box, the box will stop sliding eventually. If Joe doubles his force on the box, the speed of ...

*June 8, 2014 by Sam*

**Physics**

Consider the box being pulled across the horizontal surface again. If the box has a mass of 10kg, the coefficient of friction is 0.25,the distance that the box is pulled is 5m, the force is 150N and the angle is 30 degrees, ehat was the initial speed of the box if the final ...

*August 19, 2016 by Aishah*

**science**

1a)A block of mass=100kg is tied to a donkey that moves with constant acceleration of 20cm/s^2 up a 30 degree incline. What is the force with which the donkey pulls on the block parallel to the incline? the coefficient of kinetic friction between the incline and the block is 0...

*May 5, 2010 by Anonymous*

**Physics**

Which of the following forces does NOT have a zero work done on the object: a)The normal force on a box that slides across a horizontal level floor. b)The weight on a box that slides across a horizontal level floor. c)The normal force on a box that slides down an inclined ...

*November 10, 2009 by Nikita*

**Physics**

I have 3 different questions. 1) Calculate the coefficient of kinetic friction if it takes a force of 64 Newtons to keep a 54 kilogram box of books sliding across any icy surface at a uniform speed. 2) A car weighing 14,000 Newtons rests on a 20.0 degree incline. Calculate the...

*October 6, 2010 by Dorothy*