April 16, 2014

Search: A force of 5.0 is required to stretch a certain spring by 1.2 .How far must this spring be stretched for its potential energy to be 0.015 ?

Number of results: 48,164

An astronaut and a satellite are in an environment where no net external forces act on them. The astronaut tugs on the satellite with a force of 9.5 N in positive x-direction. What is the x-component of the force exerted by the satellite on the astronaut?
Tuesday, September 11, 2012 at 5:23pm by Anonymous

Compounds formed between elements on the far left and far right of the periodic table tend to be ionic. Those compounds formed between elements on the same side of the table (near each other) tend to be covalent. K and Br will be ionic. Ba and Cl will be ionic. O and F will be...
Wednesday, February 8, 2012 at 6:40pm by DrBob222

physics PLEASE HELP (very very confused)
2 blocks are connected by a rope of negligible mass are being dragged by a horizontal force. Suppose F= 68.0N, m1= 12.0kg, m2= 18.0kg and the coefficient of kinetic friction between each block annd the surface is 0.100. a.) draw free body diagram for each block b.) determine ...
Wednesday, October 17, 2007 at 9:18am by ~christina~

Kate and John both are 100 m far away from each other. They both are 1.5 m tall. They flagpole are somewhere between them. Kate looking up the flagpole at the angle of elevation of 25 degree while John looking at 60 degree. How far the flagpole they both standing and how tall ...
Friday, December 2, 2011 at 1:51pm by Anonymous

A force of 26 lb. acts through a point (4; 5; -7) ft. and is equally inclined to the positive ends of the orthogonal axes. What is the moment of this force about the origin So i'm assuming vector r is 4i+5j-7k? And using the fact that cos^2α + cos^2β + cos^2γ = ...
Sunday, February 12, 2012 at 1:07am by Aaron

Science... plz help~!
A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. (1 point) True*** False A ball slowing down as it rolls across a carpet is an example of (1 point) Balanced force Friction*** Inertia Zero net force If the ...
Tuesday, March 4, 2014 at 10:29pm by Anonymous

physics parallel plate
A proton traveling at a speed 1.0*106 m/s of enters the gap between the plates of a 2.0-cm-wide parallel-plate capacitor. The surface charge densities on the plates are 1*10^-6 C/m2. How far has the proton been deflected when it reaches the far edge of the capacitor? Assume ...
Monday, August 17, 2009 at 7:33pm by Anonymous

Help! How do I complete these magic squares! They're taking me FOREVER! In magic squares, certain numbers have to add up to a certain sum, and be the same sum diagonal,across,and vertical. (Sorry if I didn't explain well) Arrange the numbers 2,4,6,8,10,12,14,16, and 18 so that...
Wednesday, August 25, 2010 at 4:00pm by math

The table below shows the number of hours required in each of two departments to make one unit of various products A, B and C. For example, product B requires 1 hour of time in department I and 3 hours in department II. HOURS REQUIRED PER UNIT OF PRODUCT DEPARTMENT 1 A=1 B=1 C...
Monday, July 11, 2011 at 11:07pm by kIM

Physics check
If mu = 1.2, the friction force opposing motion is M g mu = 1000*9.8*1.2 = 11,760 N The net force pulling the box is F = 20,000 - 11,760 = 8240 N and the acceleration is a = F/m = 8.24 m/s^2. Congratultions!
Monday, November 5, 2007 at 10:55pm by drwls

You haven't done what I suggested. Pick an object, massm, and find the force of gravity on it from the Earth, let the distance be x. Then the same object, the force of gravity on it from the Moon, distance 3.84E8-x, then set the two forces equal, and solve for x.
Sunday, September 13, 2009 at 4:44pm by bobpursley

Two forces act concurrently on a point P. One force is 60nt due east. The second force is 80nt due north. (a) Find the magnitude and direction of their resultant. (b) What is the magnitude and direction of the equilibriant?
Monday, January 17, 2011 at 9:59pm by Elise

The work done by the pulling force is A = F s cos α = 2799.14cos26.3 = 2286.1 Joules. The work done by the kinetic frictional force is Afr = Ffr s cos α =kmgscos180= =0.25975.99,8(-1)= - 195.6.
Monday, February 27, 2012 at 2:46pm by Elena

Impact force
A 65.0 kg professional diver performs a dive from a platform 10 m above the water surface. Find the average impact force she experiences in her collision with the water if the collision lasts for 0.800 s.
Sunday, October 21, 2012 at 9:38pm by Anonymous

(a) Suppose you throw a football. At some instant, when the ball is in contact with your hand, your hand exerts a force of 100 N on the ball in the +x direction. What is the force of the ball on your hand?
Thursday, November 19, 2009 at 9:38pm by Sasha

ETH 125
This is what I have so far. Native Americans are at risk of losing their children because of poor living conditions on the reservation, lack of food and clean water, and substance and alcohol abuse. Some Native Americans are told they are too old or not qualified to be parents...
Friday, December 17, 2010 at 5:04pm by Amanda

College Calculus 1
I suggest the following approach. Let the friend (outside of the tracks) be at the origin. Express the x and y coordinates of the runner in terms of t, for example, X(t)=rcos(st/r)+d Y(t)=rsin(st/r) s=speed in m/s r=radius d=given distance Express the distance between the two ...
Friday, October 1, 2010 at 3:33pm by MathMate

wat causes an apple to fall down from a tree a pulling force towards the tree or a pulling force towards the earth
Friday, November 14, 2008 at 1:11pm by Anonymous

The maximum force the crate can withstand is mass*g*.35 Its maximum acceleartion is Force/mass or g*.35 So that is the max deacceleartion of the train.
Wednesday, October 21, 2009 at 1:09pm by bobpursley

at constant speed, horizontal force*distance=workdone where horizontal force is 41cos52 workdone= mg*mu solve for mu
Thursday, April 15, 2010 at 4:40pm by bobpursley

power= work/time=force*distance/time but force= m*a you have those. distance= 1/2 a t^2 power= ma*at/2= mta^2/2 you are given m, t, and a
Tuesday, November 16, 2010 at 1:26pm by bobpursley

Ahhhhh. You have to add g to it. a= Force/mass + g so break up force/mass into vertical, horizontal, then add g to vertical.
Saturday, November 20, 2010 at 3:18pm by bobpursley

A 95 kg tennis player hits a 0.5 kg tennis ball with a force of 150 N What force does the ball exert on the raquet?
Wednesday, February 1, 2012 at 7:58pm by Kayy

principles of physics
force lasts longer impulse = force * time = change of momentum longer time --> more impulse
Sunday, February 19, 2012 at 5:03pm by Damon

f = GMm/r^2 if you replace r by r/2, you have GMm/(r/2)^2 = 4GMm/r^2 = 4f so, the force increases 4-fold If r changes by a factor of k, the force changes by a factor of 1/k^2
Monday, November 26, 2012 at 9:42am by Steve

the ratio of the inlet pistol force and outlet pistol force is 2:7.calculate the diameter of the inlet pistol if the radius of pistol one is 15cm
Thursday, May 2, 2013 at 3:36am by khomotso

sry i will write whole questions: Do you know how big the Sun is? The Sun is 400 times as big as the Moon and 400 times as far away. The Moon: 2.5mm diameter a) How big would the Sun be if the Moon were the size shown above? b) The Sun is actually about 865,000 miles in ...
Friday, January 9, 2009 at 8:28am by luca

Do you mean a constant SPEED of 3.00 m/s? At maximum load, the motor must provide a maximum force (1000 kg)*g + 800 kg*g + 4000 N = 21,640 N. Maximum power requirement = Force x velocity = 65 kw
Thursday, March 12, 2009 at 6:01pm by drwls

In a tug-of-war between two athletes, each pulls on the rope with a force of 270 N. What is the tension in the rope? ______ N If the rope does not move, what horizontal force does each athlete exert against the ground? ______ N is the first on 250 and is the second one 0?
Tuesday, October 20, 2009 at 7:40pm by Ashlynn

What is the minimum downward force on the box ( m=30 kg)that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.40 and 0.30, respectively.One person is pulling the box forward with a force of 125 N.
Tuesday, December 7, 2010 at 8:46am by vinu

Use the equation Fnet,x = M*a, to solve for M. Fnet,x is the net force on the crate in the +x direction. That is equal to 752 cos22 - Ff The friction force Ff is Ff = (M*g-752sin22)*(0.347) Put it all together and turn the algebra crank to get M.
Sunday, March 20, 2011 at 11:48pm by drwls

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
Tuesday, April 26, 2011 at 10:01pm by Merlin

College Physics
A force, F = (2x + 3y) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (5x + 4y + 2z) m. Calculate the torque (in units on Nm) created by the force about that pivot point.
Sunday, November 3, 2013 at 5:48pm by Kimmy

Someone left out the word WORK in your question. The question should read: "How much Work do you do if you push a garbage can with a force of 30N while sliding it 4 meters" The answer is Work = Force x Distance, which is 120 Joules in this case.
Wednesday, May 29, 2013 at 2:24pm by drwls

College Physics
6. A tall bald student (height 2.1 meters and mass 93.1 kg) decides to try bungee jumping from a bridge. The bridge is 36.7 meters above the river and the "bungee" is 25.3 meters long as measured from the attachment of the bridge to the foot of the jumper. Treat the "bungee" ...
Wednesday, June 29, 2011 at 2:46pm by Jane

The freezing point of a solution is A. higher than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstruction by solute particles. B. lower than the freezing point of the solvent alone ...
Wednesday, April 2, 2008 at 5:30pm by allan

vf^2= 2ad = 2 (force/mass) d force= vf^2*mass/2d
Monday, November 19, 2007 at 4:16pm by bobpursley

Physics Normal force
Yes. The "normal" force is the perpendicular component. There can be a parallel component as well.
Saturday, August 3, 2013 at 2:37am by drwls

Nautical Studies/Tides
New moons & Full moons are responsible for Spring Tides. Moon's & Sun's gravity in line. 1st quarter & last quarter are responsible for Neap Tides. Moon's gravity 90 degrees to Sun's gravity. This is generally accepted & understood. However if you look in a tide table or ...
Wednesday, October 10, 2007 at 2:09am by Mike

Check my answers please- Physics
What is an equilibrant? (Points : 1) an object that has zero net force acting on it two chemical reactions proceeding at the same rate in opposite directions a force that makes the net force on an object zero a force in the same direction as the net force <-- Question 2. 2...
Monday, November 18, 2013 at 12:25pm by Gynelli

holidays and temp.
what season is easter in? is it spring? how about thanksgiving day? what season is that in? How's the weather in winter for Alaska and Seattle?
Monday, February 25, 2008 at 12:25pm by anonymous

I can not think of 2 more questions to ask a teacher.When and If I interview a teacher. The teachers in my area are on spring break like the students.
Sunday, April 6, 2008 at 7:49pm by Dawn

Physics - please help
The potential energy of the spring would be PE=1/2 200 ( .2)^2 this could be translated to a height of.. 1/2 200 *.02^2= .5 * 9.8*h solve for h.
Thursday, October 2, 2008 at 10:23pm by bobpursley

It travels up until the gravitational energy gain, m g h, equals the potential energy of the compressed spring, (1/2) k X^2. Solve for h
Thursday, November 19, 2009 at 3:08am by drwls

(1/2)K X^2 With compression you use a negative X, but get the same answer as stretching by the same amount, because the X is squared. K is the spring constant, 4.5*10^4.
Tuesday, March 9, 2010 at 11:36pm by drwls

Explain why a heavy rainfall on a fruit orchard in the spring might result in a poor fruit yeild in the fall.
Wednesday, May 5, 2010 at 8:55pm by Christina

What do you get for the spring scale? The weight of liquid displaced should be the difference in each scale if they had been weighed separately.
Friday, December 3, 2010 at 1:11am by MathMate

Use this formula to solve for the spring constant k (in Newtons per meter): P = 2 pi sqrt(M/k) You know P amd M. Solve for k
Friday, March 4, 2011 at 12:07pm by drwls

A simple harmonic oscillator has spring constant = 8.8N/m , amplitude = 11cm , and maximum speed 4.6 m/s. what is the speed at x=6cm?
Thursday, October 20, 2011 at 12:16am by Alan

Physics - Verification
your second quesion. Friction absorbs energy, as does the spring. They add to equal the energy input of the system.
Friday, February 3, 2012 at 6:33pm by bobpursley

I think your solution tells us when the spring moves 18 cm, not 9 cm. Thank you, though. This was really useful.
Saturday, June 2, 2012 at 8:13pm by Jimmy

Tropical storms often hit Japan during the ________. summer winter spring fall Summer?
Thursday, December 12, 2013 at 10:15pm by Anonymous

A block of mass 9.00 kg is pushed up against a wall by a force P that makes a 50.0 angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.245. Determine the possible values for the magnitude of P that allow the block ...
Wednesday, June 6, 2012 at 6:24pm by Kathy

Hopefully, some of the following links will help: Sra
Wednesday, February 9, 2011 at 6:19pm by SraJMcGin

could someone please break this down and show me how to do it? A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms The ...
Tuesday, September 13, 2011 at 9:19am by noone

1. Suppose that the money supply is currently $500 billion and Fed wishes to increase it by $100 billion. Given a reserve ratio of 0.25 what should it do? 2. Determine the impact on each of the following if 2 million formerly unemployed workers decide to return to school full ...
Sunday, December 7, 2008 at 12:33am by woedred

This question was answered elsewhere. If you assume the net force includes the weight, multiply 385 N by 2.0 m to get the kinetic energy when it is released. Call that K.E.= 770 J Then use K.E = M g h = W h to get the additional height H that it rises after release. W is the ...
Thursday, January 3, 2008 at 5:40pm by drwls

The charged particle on the incline stays in the middle because the electrstatic force of repulsion balances the gravitational force acting along the incline downwards. If the distance between the charged particles is x: k Q^2/x^2 = mg*(sin21deg) here k =1/4*pi*epsilon0 ...
Wednesday, June 13, 2012 at 11:21pm by ajayb

College Physics
Let the tension force be T and the angle be A. Vertical and horizontal force balance equations tell you thatL T cos A = m g T sin A = m a Divide the secnd equation by the first. tan A = a/g a = artan a/g Now solve for T Hint: Add the squares of each of the first two equations
Saturday, February 20, 2010 at 12:31pm by drwls

A 1.20*10^2 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0 below the horizontal. The coefficient of kinetic friction is 0.350. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is ...
Tuesday, October 19, 2010 at 4:09pm by peter

7th science
Many forces act on a car, even when it is standing still. Gravity, for instance. They should be asking you if there is a NET force on the car if it is traveling at constant speed while turning. The answer to that is yes. A net force is needed perpendicular to the direction of ...
Saturday, January 21, 2012 at 8:42pm by drwls

A 1.60 102-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0 below the horizontal. The coefficient of kinetic friction is 0.200. What should be the magnitude of , so that the net work done by it and the kinetic frictional force is zero?
Saturday, November 17, 2012 at 2:50pm by Anonymous

Forces are applied to two ropes which are attached to the bumper of a stalled car. If F1 = 100 lbs at an angle of θ1 = 58 degrees, find the necessary magnitude and direction of force F2 so that the resultant force is 190 lbs in the direction shown.
Friday, December 6, 2013 at 6:51pm by nick

No friction so any work done on it = change in PE + change in KE Assume both PE and KE are zero at start. How far up did it go? h = .5 sin 30 = .25 meters up How much potential energy did it gain? PE = m g h = 3.0 * 9.8 * .25 = 7.35 Joules How much work was done on it Force in...
Wednesday, February 13, 2008 at 4:41pm by Damon

You observe an arti cial satellite orbiting the earth and estimate it is at an altitude h = [03] km above the earth's surface and has a mass m = 3500 kg. You wish to calculate when the satellite will be back in the same position. From the second law of motion and the ...
Thursday, April 1, 2010 at 7:53pm by Adrianne

9x-5y = 2; y = 9/5x -(2/5) (using y=mx+c) Slope of the given line = 9/5 hence the required line will have the same slope(9/5) since it is parallel. Now putting the given point(5,-8)in y=mx+c; since it passes through (5,-8) -8 = m * 5 + c where m= slope = 9/5 or -8 = (9/5)*5...
Sunday, October 18, 2009 at 4:10pm by Vipster

Writing sentence and Paragraphs. Does the below look correct? Paragraphs 2 I am very excited about making medical billing and coding as my new field of my career. Since I use to work for Mary Brecking Ridge Hospital for 6 years. I learned a lot so now I have decided to get ...
Friday, January 13, 2012 at 5:53pm by Mama

6(4x+3)^5(4)(3x-5)^5+ 5(3x-5)^4(3)(4X+3)^6 common factors: (4x+3)^5 (3x-5)^4 [(4x+3)^5 (3x-5)^4] [24(3x-5) + 15(4x+3)] Take the second term, combine like terms. f(x)=(4x+3)^6(3x-5)^5 Find the derivative. This is what I did so far. =6(4x+3)^5(4)(3x-5)^5+ 5(3x-5)^4(3)(4X+3)^6 =...
Sunday, December 10, 2006 at 9:16am by bobpursley

Two point charges, Q1 = -6.7 C and Q2 = 1.2 C are located between two oppositely charged parallel plates. The two charges are separated by a distance of x = 0.32 m. Assume that the electric field produced by the charged plates is uniform and equal to E = 75000 N/C. Calculate...
Tuesday, January 29, 2008 at 9:04pm by Peace

Physics relationship
Let W1 represent the work required to accelerate an object on a frictionless horizontal surface from rest to a speed of v. if W2 represents the work required to accelerate the same object on the same surface from a speed of v to 2v, then which one of the following is the ...
Tuesday, October 16, 2012 at 12:32am by Cody

organic chem/ melting pt lab
In general, a tighter packed crystal lattice of a solid will have a higher melting point. Impurities tend to disrupt the crystal lattice, so they always lower the melting point to a certain limit, which is called the eutectic point. The blend is called a eutectic mixture. When...
Wednesday, May 27, 2009 at 10:55pm by PC

Wb = mg = 4kg * 9.8N/kg = 39.2N = Weight 0f block. Fb = 39.2N@0deg. Fp = 39.2sin(0) = 0 = Force parallel to surface. Fv = 39.2cos(0) = 39.2N. = Force perpendicular to surface. Fap - Fp - Ff = 0, 20 - 0 - Ff = 0, Ff = 20N. = Force of friction. u = Ff / Fv = 20 / 39.2 = 0.510...
Wednesday, October 26, 2011 at 2:43pm by Henry

W = mg = 11kg * 9.8N/kg = 107.8N. = weight of the mass. Fm = (107.8N.,69deg.). Fv = 107.8cos69 = 38.63N. = Force perpendicular to the incline = The normal force.
Wednesday, October 5, 2011 at 12:12am by Henry

The Republic of Singapore Air Force uses the AIM-9 Sidewinder air-to-air missile which has a mass of 85.6kg. If the missile can accelerate from 300m/s to 700m/s in 6 seconds, what is the average force exerted on the missile?
Monday, October 10, 2011 at 11:24am by Mah

A 2.9 kg body is at rest on a frictionless horizontal air track when a horizontal force F acting in the positive direction of an x axis along the track is applied to the body. A stroboscopic graph of the position of the body as it slides to the right is shown in the figure. ...
Thursday, July 22, 2010 at 12:29pm by Dave

pro forma financial statements are a. the most comprehensive means of financial forecasting b. often required by prospective creditors Thank you for using the Jiskha Homework Help Forum. Here is a definition of Pro Forma Financial Statements: Definition Financial statements as...
Sunday, January 7, 2007 at 9:49pm by evelyn

Four ropes are tied to a stake, and each is pulled toward a compass direction, N, S, E, or W. A force of 10 lb is applied to the rope pulled toward the east. Forces of 20, 30, and 40 lb are applied toward the south, west, and north, respectively. What is the net force exerted ...
Tuesday, September 22, 2009 at 5:48pm by john

HELP Not great in these Express y=2x^2 -12x +23 in the form y=2(x-c)^2 + d The graph of y=x^2 is transformed into the graph of y=2x^2 - 12x +23 by the transformation a vertical stretch with scale factor k followed by, A horizontal translation of p units followed by, a vertical...
Friday, December 10, 2010 at 5:18am by Morie

A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. -------------------------------------------------------------------------------- (a) How does the magnitude of the centripetal ...
Friday, April 11, 2008 at 4:52am by Johnson

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 ...
Sunday, March 25, 2007 at 10:28pm by COFFEE

A uniform rod of length L and mass m initially at rest is struck by a horizontal force F0 a distance x below the pivot O. The rod is free to rotate about its pivot without friction. If F0 is the average value of the force and Δt is its duration. (a) What is the speed of ...
Saturday, November 17, 2012 at 12:13am by Jake

A net external force acts on a particle. This net force is not zero. Is this sufficient information to conclude that (a) the velocity of the particle change, (b) the kinetic energy of the particle changesm and (c) the speed of the particle changes? Give your reasoning in each ...
Thursday, April 24, 2008 at 1:57am by Shante

you dont get it. Divide the force of gravity by the mass of the object which is being accelerated. F/massyou = your acceleration of course, forces come in couplets, so F/massmoon= moons acceleration toward you. where F is the force of gravity, it operates on you and the moon, ...
Saturday, September 12, 2009 at 5:03pm by bobpursley

On the two cords, use symettry arguements: the vertical components will cancel (equal and opposide directions), so the tension in the upper cord= 1/2 net force/cosTheta net force= mv^2/r tension= 1/2 mv^2/(rcosTheta)
Saturday, November 21, 2009 at 12:39pm by bobpursley

A droplet of ink in an industrial ink jet printer carries a charge of 1.6 x 10 to the power of -10C and is deflected onto paper by a force of 3.2 x 10 to the power of -4N. What is the strength of the electric field to produce this force?
Wednesday, January 6, 2010 at 6:37pm by Anonymous

A droplet of ink in an industrial ink jet printer carries a charge of 1.6 x 10 to the power of -10C and is deflected onto paper by a force of 3.2 x 10 to the power of -4N. What is the strength of the electric field to produce this force?
Tuesday, January 12, 2010 at 6:56pm by AC

college physics
Use the static coefficien, mus, to determine if it will skid. The centripetal force needed to keep from skidding is M V^2/R. The maximum friction force available is M*g*mus Compare V^2/R to g*mus V^2/R = 25^2/250 = 2.5 m/s^2 g*mus = 9.8*0.3 = 2.94 m/s^2 So it won't skid.
Monday, May 24, 2010 at 10:49am by drwls

please help! physics doesn't click with me. thank you for your help! A 23 kg suitcase is being pulled with a constant speed by a handle that is at an angle of 25 above the horizontal. If the normal force exerted on the suitcase is 155 N, what is the force F applied to the ...
Thursday, September 30, 2010 at 10:51pm by jack

(a) The weight Mg acts centripetally at the top of the hill. A smaller "normal" force is applied by the tires in the opposite direction. The net of the two forces is M V^2/R. That is probably what they are looking for (b) M g - M V^2/R is the "normal" force applied to the ...
Saturday, October 23, 2010 at 5:36pm by drwls

A man using a 70 kg garden roller on a level surface exerts a force 20 kgf at 45 degrees to the ground . Find the vertical force of the roller on the ground if he ; a) pulls the roller. b) pushes the roller.
Monday, January 10, 2011 at 7:06am by Joseph

Two charged particles exert an electrostatic force of 8 N on each other. What will the magnitude of the electrostatic force be if the distance between the two charges is REDUCED to one-third of the original distance? Would you just have to multiply 8 by 9?
Monday, January 31, 2011 at 5:05pm by Kim

Physics (Force and Motion)
a 0.20 kg ball is released from a height of 10 m above the beach; the impression the ball makes in the sand is 5.0 cm deep while the ball stops uniformly. what is the force acting on the ball by the sand?
Saturday, February 19, 2011 at 8:56pm by Anonymous

A car that weighs 15,000 N is initially moving at 60km/hr when the brakes are applied. The car is brought to a stop in 30m. Assuming the force applied by the brakes is constant, determine the magnitude of the braking force.
Saturday, June 11, 2011 at 7:03pm by Dale

Let F = 3*M*g be the average resistance force in the water. Let d = 5m be the vertical distance the water is penetrated. Let H = the board height above water. Underwater net force * d = Kinetic energy entering water = Initial potential energy (F - M*g)*d = M*g*H 2*M*g*d = M*g*...
Thursday, February 16, 2012 at 5:12am by drwls

friction on the ramp=mg*mu*cosTheta downward force due to weight=mg sinTheta Net force=mass*acceleration Tension-friction-gravityforcedown=ma solve for tension check my thinking.
Thursday, September 27, 2012 at 7:41pm by bobpursley

(a) You claim you already have the correct answer for k. (b) The friction force is Ff = (k)*(M g -380 sin20) Net horizontal pulling force = 380 cos20 -Ff = M*a Solve for a. M = 1440/9.8 = 146.9 kg
Friday, October 12, 2012 at 7:18pm by drwls

In order for a satellite in free fall to maintain uniform circular motion, ______________. a) there must be a tangential acceleration b) there must be angular acceleration c)there must be a centripetal force d) there must be a circumventing force Its either a or c. Can't ...
Friday, November 23, 2012 at 5:56pm by Kelvin

A student, crazed by the first physics Midterm, uses a pushing force of 80 N angled at 70 to push a 5.0 kg book across the frictionless ceiling of his room. a. What is the block's acceleration? b. What is the force of the ceiling on the book?
Monday, April 8, 2013 at 10:30pm by Corey

A body at equilibrium is under the action of three forces. One force is 10N acting due east and one is 5N in the direction 60 degree north-east. What is the magnitude and direction of the third force?
Saturday, May 25, 2013 at 8:23am by Adigun

A body at equilibrium is under the action of three forces. One force is 10N acting due east and one is 5N in the direction 60 degree north-east. What is the magnitude and direction of the third force?
Saturday, May 25, 2013 at 8:24am by Adigun

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