Block Definition and 998 Threads

7. A block of mass m = 5.5 kg is pulled up a θ = 22° incline as in the figure with a force of magnitude F = 38 N. (a) Find the acceleration of the block if the incline is frictionless So I got this one right, and here is what I did... From the free body diagram I drew: Fnet = (38...

Ok so I already know how to solve it by looking at an example my teacher did in class... This is what I did... 4. A 2.00 kg block is held in equilibrium on an incline of angle θ = 70° by a horizontal force vector F applied in the direction shown in the figure below. If the coefficient of static...

Homework Statement A dockworker applies a constant horizontal force of 80 N to a block of ice on a smooth horizontal floor. The fritional force is negligible. The block starts from rest and moves 11 meter in 5 seconds. What is the mass of the block of ice? Homework Equations Newton's...

A block of ice of mass m is released from rest at the top of a frictionless ramp of length L. at the bottom of the incline the speed of the ice is v1. given m,L,v1 determine the time needed to hit the bottom the angle between the ramp and the horizontal the accel of the ice I made my...

Homework Statement Homework Equations I believe the only necessary equations would be those utilized to find the X and Y components of a certain force as well as the formula used to find μs µ = ffriction/fnormal The Attempt at a Solution Attempt: I'm not really sure where...

Homework Statement The two blocks (with m=16kg and M=88kg) shown in Fig. 6-56 are not attached. The coefficient of static friction between the blocks is \mustat=0.38, but the surface beneath the larger block is frictionless. what is the minimum magnitude of the horizontal force \vec{F}...

Or light rays for that matter. Where does the window open in the atmosphere on the em spectrum, UV? Why is that?

Homework Statement A block of mass 6.7 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 56.0 N at an angle 27.9o above the horizontal. What is the magnitude of the acceleration of the block? Homework Equations f=ma The Attempt at a Solution i split...

Homework Statement A block with mass m1 = 9.4 kg is on an incline with an angle θ = 31.0° with respect to the horizontal. There is also a massless rope that pulls horizontally to prevent the block from moving. What is the tension in the rope? Homework Equations Fg = m*g Fg,x = m*g*sin...

Just a problem for my physics homework and just wondering how to solve this problem.

Homework Statement A block of mass 1 Kg initially at rest at point B is being pulled by a constant force F= 100N along a smooth circular track of radius 10 m . Find the velocity of the block when it reaches point P making an angle 60 with the vertical. Homework Equations The Attempt at a...

Homework Statement The interference pattern formed is given by I(θ)=4I0cos2(∏dsin(θ)/λ). For d=1×10-5m and λ=500nm plot the intensity pattern as a function of θ for small θ. How would this change if a block of material of thickness 500nm and refractive index n=1.5 were placed over one slit...

Hello. I got a 10x10 matrix that I know that has a block diagonal form. How can I put it in that form, using Mathematica? Regards, Marcus.

Homework Statement A block of mass m is moving along a horizontal frictionless surface with a speed of 5.7 m/s. The block encounters a slope which it travels up. If the slope is 11 degrees and the coefficient of kinetic friction between the block and the incline is 0.26, how far does the block...

Why sine wave is the basic building block signal to make other signals? Not any other wave. -Devanand T

Homework Statement Hi all, I've been given a question for homework and I am not 100% sure how to do it exactly! I have included a diagram or the situation Homework Equations The question is Find the resultant force on the block (picture attached) The Attempt at a Solution What i did...

pHomework Statement A 5.03 box sits at rest at the bottom of a ramp that is 8.76 long and that is inclined at 30.0 above the horizontal. The coefficient of kinetic friction is 0.40, and the coefficient of static friction is 0.50. What constant force , applied parallel to the surface of the...

Homework Statement http://img152.imageshack.us/img152/8286/imag0103l.jpg *I'm aware my free body diagram is off and that normal force should be in the left quadrant. Homework Equations F=m*aThe Attempt at a Solution Would I be correct in saying.. Fg of A = mg * sin (20) = 2kg * 9.8 * sin...

Homework Statement So I have a block that has had a bullet shot through it at an initial speed of 280m/s. It is 0.03kg and after it leaves the block it is traveling at 190m/s. The block is a length of 0.012m and weighs 1.50kg. What is the average force exerted on the block? Homework...

Homework Statement A 1-lb ball A is traveling horizontally at 20 ft/s when it strikes a 10-lb block B that is at rest. If the coefficient of restitution between A and B is e = 0.6, and the coefficient of kinetic friction between the plane and the block is µk = 0.4, determine the time for the...

Homework Statement A bullet with mass and speed v hits a wooden block of mass M that is situated at rest on a frictionless surface. It penetrates the block and gets trapped inside it as a result of a constant retardation force F_{ret} that opposes relative motion between the two objects...

Hi! I just wanted to ask something. If i have a block, that is resting on the left side of a bar, and everything is floating on water, how can I calculate the mass (m) of that block? (I have the mass of the bar (M) and the volume on the block (V))

A pulley is set up on the edge of a desk. A light string connects a 10 kg block laying on the desk to a 4 kg block hanging off the pulley. The only significant friction is with the desk, and the coefficient of kinetic friction is 0.20. Use the law of conservation of energy to find the speed of...

Homework Statement A block is given an initial speed of 3m/s up a 22° inclined plane. How far up the plane will it go? How much time elapses before it returns to its starting point? Homework Equations D = 1/2at2 a = Δv/t Vf2 = Vi2+ 2a*d The Attempt at a Solution The Vy is 1.12m/s...

Homework Statement A cable is pulling a 200kg block up an inclined plane elevated at 30 degrees with 3.5KN of force. How fast is the block accelerating at? θ = 30 g = 9.81 m = 200kg μ = 0.35 F = kN Homework Equations F = ma The Attempt at a Solution Wasn't sure how to do this problem, I...

Homework Statement How long would it take for the block to travel 10m starting from zero velocity? (i.e. T =?) (Look the the attached picture for the block and the position of it on the plane at 45 degree and 10 m from ground with the same slope) Theta = 45 degrees m = 1.0 kg f = 0.3...

Homework Statement Okay, i am preparing for an exam so the questions i am doing are only for my learining they will not be marked anyway I already know that the answer is C) 0.5ms-2 what i need is an explanation, i don't understand how that answer was derived... I thought it would...

Homework Statement A cubical block of side L rests on a fixed cylindrical drum of radius R. Find the largest value of L for which the block is stable. This is problem 6.35 from the Kleppner+Kolenkow Introduction to Mechanics book. I honestly have no clue where to even start on this problem...

Homework Statement You are given a 10cm Cube of aluminum with Density of 2700kg/m is submerged in water and the weight in water is 13N. If a cavity exist how big is it? Homework Equations The equation i used were B = V * P_water * g to find buoyancy. To find the enclosed cavities i...

Homework Statement : A bullet of mass 25g is fired at 425m/s into a block of wood , mass 1.200kg,hanging at the end of a 1.0m long string which is attached to the ceiling .The bullet becomes embedded in the block causing it to swing back along an arc.Through what angle does the block swing...

Homework Statement Block A weighs 75lbf and the coefficients of static and kinematic friction between A and the plane are both 0.50. Determine the acceleration of A under the action of the 25 lbf force when the velocity at A is (a) 8fps up the plane, (b) 15 fps down the plane. (c) Zero...

Homework Statement finding the overall transfer equation Homework Equations not sure which equation to use The Attempt at a Solution unsure how to solve this, don't know where to start off from

Refraction -- A light ray is incedent on a block of glass at an angle of 30 degrees Homework Statement A light ray is incedent on a block of glass at an angle of 30 degrees,what is the angle of refraction. Given: glass: 1.47 incident angle:30° Homework Equations π1 sin θ1 = π2 sin...

I want to display a real time signal from ECG I use simulink block -scope and want it to be display in gui axes This is a code from some other guy function Command1_Callback(hObject, eventdata, handles) button_state = get(hObject,'Value'); if...

I have got a problem in my research. For the following matrix, a a a a a a b b b b a a a a a a b b b b a a a a a a b b b b a a a a a a b b b b a a a a a a a a a a a a a a a a a a a a b b b b a a a a a a b b b b a a a a a a b b b b a a a a a a b b b b a a a a a a, does anyone know how...

Homework Statement A cylinder is cut out of a large block with mass M=4kg sitting on a table. A small block of negligible size and mass m=0.5kg is placed within the hole. All the surfaces are frictionless. The radius of the cut is R=0.80m and the angle is 25 degrees. Basically there's a...

Homework Statement There is a 2-D block with height H, width W, and mass M. (H > W) A force F is applied from behind the block at a height 0.1H from the ground. If the coefficient of friction is μ, what does the force F need to be to cause the block to tip backwards? Homework Equations...

A wooden block of mass M = 1.83 kg is rest on a frictionless, horizontal table attached to the end of an unstretched spring (k = 217 N/m). A bullet of mass m = 8.02 g is fired horizontally into the block at speed vo = 394 m/s. The bullet comes to rest inside the block, and causes the mass to...

Basically we did a lab where you attach a pulley to the desk with a clamp and then have a friction block (three types: cork, plastic, and felt) attached to a string which is attached to a hanging mass. This basic setup is called an atwood's machine. The purpose of the lab was to identify the...

1. Consider a ramp of length L inclined at an angle Ɵ > (the angle of repose) to the horizontal. A block of mass m is placed at the high end and released from rest. (a) If µ = 0; what is the speed of the block at the bottom of the ramp? (b) Suppose now, that µ ≠ 0: What is the speed at some...

A spring is mounted vertically at the bottom of an empty swimming pool. A block of mass M = 857 kg is attached to the spring, and it compresses the spring from its equilibrium position by distance xo. Now the swimming pool is filled with fresh water, and the block is submerged. You find the the...

Homework Statement The spring in the figure below is initially compressed by 0.4 m in the position shown. If released from this position, block A travels 0.9 m before coming to a stop. The kinetic coefficient of friction is 0.8. What is the spring constant? (The spring is not fastened to...

Homework Statement A block of mass 2.96 kg is sliding up a ramp with an initial speed of 12.8 m/s. The ramp is inclined from the horizontal at an angle of 36.4 degrees and the coefficient of kinetic friction is \mu=045. What is the displacement of the block along the ramp from the initial time...

Homework Statement An aluminum block has a mass of 0.25kg and a density of 2700 kg/m cubic. a) calculate the volume of the aluminum block. b) Determine the buoyant force exerted on this block when it´s completely submerged in water of density 1000kg/m cubic. Homework Equations v = m/d The...

A pulley is mounted at the edge of a table. A block is connected to an identical block through the pulley(assumed to be weightless)by a weightless in-extensible thread of length 2l. The left block rests on the table at a distance l from the edge (where the pulley is mounted) while the right...

So I've been working on this problem for a while and can't seem to come up with anything and I don't really understand why I'm wrong in what I did. I could just get the answer online, but I actually want to understand what's happening. Homework Statement A rifle bullet with mass 8.12g and...

Somewhere in a dark corner of the "internet" lies a video of somebody that somehow crossed the leads from the header pipes so instead of all the primaries going into one collector some go into the other side collector...that produced a very exotic sound. Can someone tell me a little more...

I'm working on a small design project and need some help remember what equations to use here. Basically, we are creating a hammering device. A compression spring will be loaded, and a block on the end is accelerated into another block. I need to have it hit with a certain impact force so I am...

Please, I need your help with this... it's starting to annoy me. I just don't know where are the tension forces... I get really confused doing this kind of things with pulleys and ropes. Look at pulley 4, I've seen that the tension force in the right is upward but why? Isn't that the...

Greetings Members I'm a chemistry student doing some research [this is not homework!] on boost conversion and I need help discerning the node analysis for this step-up voltage regulator. I've found pretty decent tutorials on elements such as the comparator, npn transistor, and oscillator. But...