Vertical Definition and 997 Threads

Homework Statement A block of mass 0.640 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point B, the bottom...

Sorry to be a bother at this time around. I have a question though about a weird looking function : e^(6-2x) + 5. (The 5 is outside of the parenthesis, so it is a coefficient, not an exponent). I am interested in seeing how to use limits to construct its graph. In particular, I want to find out...

A skier is moving at 85 km/hr straight down a tall mountain having a slope of 60 degrees. At what rate is the magnitude of the vertical component of his trip decreasing? I just don't understand exactly how to find it. The wording doesn't make sense to me and I don't know where to start.

Homework Statement I am doing a lab in which we are to show that the energy in a spring mass system is constant throughout the oscillations. Homework Equations I set y initial = 0 to be the point where the spring was in equilibrium when the mass was attached to it. At any given point...

What symbol is a small vertical bar with an arrow? I know a plain arrow is "determines". Is there a good site that lists the vocabulary of mathematicians?

Homework Statement A solid uniform disk unrolls from a string which is wrapped around it. If tension and weight are the only important forces, find the vertical acceleration of the disk in terms of gravity. Homework Equations The Attempt at a Solution mg - T = ma a = mg - T...

question about "vertical" and "horizaontal" Homework Statement the terms "vertical" and "horizontal" are frequently used in physics. give operational definitions for these two terms. an operational definition defines a term by how it is measured or determined. your definition should apply...

I have two problems: Homework Statement I am given the positions and velocities of a mass on a spring at two times, which is four equations. I need to find the position and velocity of the mass at t=1s. Homework Equations 0.35=-A\omegasin\phi 0.1=Acos\phi...

http://img158.imageshack.us/img158/6946/blockspringcy2.gif A block of mass 10 kg hangs on a spring. When a second block with an identical mass of 10 kg is tied to the first, the spring stretches an additional ho = 1.3 m. a) What is the value of the spring constant k? Now the string is...

How do you calculate vertical velocity when you're not given an angle? For example, A player kicks a football at the start of the game. After a 6.6 second flight, the ball touches the ground 59 m from the kicking tee. If air resistance is disregarded, find. a. The maximum height...

Homework Statement A bowling ball weighing 71.2 N is attached to the ceiling by a 3.80m rope. The ball is pulled to one side and released. It then swings back and forth like a pendulum. As the rope swings through its lowest point, its speed is 4.20 m/s. At that instant, find a) the...

Homework Statement GIVEN: mass = .34 kg radius =.5 m If a solid rubber ball attached to the end of a light string is swung at a constant speed in a vertical circle, what is the tension a quarter of the way around the circle (i.e. when the string attached to the...

Homework Statement A projectile is fired at an angle of 60 degrees above the horizontal with an initial speed of 300 m/s. Calculate A) the horizontal distance traveled and B) the vertical height attained in the first 6 s. Homework Equations The Attempt at a Solution I did...

Homework Statement You swing a 6.5 kg bucket of water in a vertical circle of radius 1.2 m. (a) What speed must the bucket have if it is to complete the circle without spilling any water? m=6.5 r=1.2 Homework Equations maybe f=ma f=m(v^2/r) The Attempt at a Solution What I did...

I want to understand this: In the case of a dropped object, the horizontal component of the velocity with which the object hits the ground is not the same thing as the horizontal velocity itself, am i right? The horizontal component of the velocity when the object hits the ground means the...

Homework Statement A girl throws a ball vertically upwards with speed 8ms^-1 from a window which is 6m above horizontal ground. (a) Find the greatest height above the ground reached by the ball. (COMPLETE) (b) Find the distance below the window of the point where the balls meet...

Homework Statement On takeoff, the combined action of the air around the engines and wings of an airplane exerts a 7049N force on the plane directed upward at an angle of 58.7 above the horizontal. The plane rises with a constant velocity in the vertical direction while continuing to...

Homework Statement A research balloon of total mass 410 kg is descending vertically with a downward acceleration of 1.0 m/s2. How much ballast must be thrown from the car to give the balloon an upward acceleration equal to 1.6 m/s2, presuming that the upward lift of the balloon does not...

Hey guys, I am stuck on this question. I was wondering if anyone can help me. I am going to attach a picture. Here is the question. The magnitude of the vertical force F is 82.5 N. If you resolve it into components Fab and Fac. What are the magnitudes of these components? (unit...

vertical displacement!? help anyone. =] i have no idea wat to do!?? In a scene in an action movie, a stunt man jumps from the top of one building to the top of another building 3.9 m away. After a running start, he leaps at an angle of 13◦ with respect to the flat roof while traveling at...

Homework Statement A kangaroo jumps to a vertical height of 2.55 m. How long was it in the air before returning to Earth? Homework Equations v = v(initial) + a*t x = x(initial) + v(initial)*t + 1/2*a*t^2 v^2 = v(initial)^2 + 2*a*(x - x(initial)) The Attempt at a Solution I...

Homework Statement A ball is thrown vertically from the edge of a cliff. It rises 10 m above the cliff, then falls 50 m below the cliff. Find the inital velocity and determine the time the ball was in the air. Homework Equations (v final )^2 - (v initial)^2 = 2a (delta y) The...

I have to calculate the vertical reactions at point A and C. I know that the sum of all vertical forces is equal to zero but i can't solve the equation since there's two variables. http://users.on.net/~rohanlal/Q3.jpg Bv=50 Cv=55 Dv=45 w=80

An aircraft flying in a straight line at constant height h and speed U drops a package on a target at ground level. The package is subject to air resistance whose magnitude is kmv where v is the speed of the falling package, m its mass, and k > 0 a constant. (a) Show that the vertical...

Why does the vertical line test work? If the line hits the graph more than once, it is said to not be a function. But why?

Homework Statement Find the volume of the solid obtained by rotating the region under the graph of y=1/x and y=1/x^2 about the vertical axis x=-1 Also given are points on the y-axis (0,2) and (0,5). I guessing these points are specific sections of the graphs where we find the volume...

Homework Statement A spring is standing upright on a table with its bottom end fastened to the table. A block is dropped from a height of 3.0 cm above the spring. The block sticks to the top end of the spring and then oscillates with an amplitude of 10 cm. What is the oscillation frequency...

Hi, If we have a vertical spring with a mass attached to it, how does the energy of the system work. Let's say we set the zero point as the point where the spring is unstretched (basically with no mass attached). Then at the top we have zero kinetic, zero spring potential as well as zero...

Homework Statement Show that, at the bottom of a vertical mine shaft dug to depth D, the measured value of g will be g = g_{s}\left(1-\frac{D}{R}\right)g_{s} being the surface value. Assume that the Earth is a uniform sphere of radius R. Homework Equations F = \frac{GMm}{r^{2}} V_{S} =...

Homework Statement Two masses, 1.5 KG and 3.0 KG, are tied together by a light string and looped over a frictionless pully. They are allowed to hang freely. Determine the magnitude of the acceleration for each mass. [Answer: 3.3 m/s2) Homework Equations Fnet = ma Fg = mg The...

I am going to test a full body harness. I need to know how far a 420 pound weight needs to drop to exert the same force as a 350 pound weight dropped 5 feet. Thank You Norm Wood

[SOLVED] Finding a Vertical Force given friction and a horizontal force Homework Statement Problem: A box with a weight of 50 N rests on a horizontal surface. A person pulls horizontally on it with a force of 10 N and it does not move. To start it moving, a second person pulls vertically...

I have to find the vertical displacement of a potato shot out of a potato launcher (Gr. 11 Physics assignment). It would make sense (and make this easier) to assume that the potato went straight up and down and I am allowed to assume that air resistance is negligible. My main problem is proving...

Homework Statement Calculate any or all of the following: horizontal velocity, initial vertical speed, angular launch speed, launch angle, and maximum height all for an object with a mass of 7.3g that is projected 24.5m. Homework Equations The Attempt at a Solution V=d/t...

I am a coach for athletes in various sports and have a problem that I can't figure out, but I'm hoping will be easy for someone here. I am looking to determine the height of a vertical jump from some limited information via an accelerometer. The accelerometer is attached near the center of...

An 5 kg block is fastened to the top of a vertical spring (perpendicular to the floor) with a spring constant of 1000 N/m. A 3 kg block sits on top of the 5 kg block. The springs are pushed down so that they oscillate. I need help finding the magnitude of the maximum acceleration the...

Supposedly taking off horizontally costs less and is more energy efficient than vertical takeoff. Aside from the issues of staging, and rocket vs. propeller, does anyone know why HTO is better than VTO?

A mass is attached to a spring supported from the ceiling of an elevator. We pull down on the mass and let it to vibrate. If the elevator starts to accelerate(fixed accelerate) upward, 1) How the maximum velocity changes? 2) How the amplitude changes? 3) How the total energy changes? I...

Homework Statement A mass m starts at rest on a frictionless track a distance H above the floor. It slides down to the floor-level where it encounters a loop of radius R. A) What is the minimum height H for which the object makes around the loop without losing contact with the track? B) What...

Hey guys. This might not be the right place for this, but any ideas on how I can use a vertical bar to represent evaluation in LaTeX? Example \displaystyle \frac{d}{dt} |_{t=0} f(t) I would like the vertical bar to be the size of the differential. I've tried using \left|, \right|...

Homework Statement A force of magnitude 39.5N stretches a vertical spring a distance 0.256m. a) What mass must be suspended from the spring so that the system will oscillate with a period of 1.10s? got 4.73kg b) If the amplitude of the motion is 5.00×10−2m and the period is that...

Homework Statement a particle P of mass m is projected vertically upwards with velocity U_0\mathbf{k} in a uniform gravitational field -g\mathbf{k} with air resistance proportional to the square of the velocity. This is a five part question for which I have found the solutions but there is one...

Homework Statement A massless spring hangs from the ceiling with a small object attached to its lower end. The object is initially held at rest in a position yi such that the spring is at its rest length. The object is then released from yi and oscillates up and down, with its lowest...

Homework Statement A 70kg climber is suppored in a "chimney" by the friction forces exerted on his back and shoes. The coeffcients of static friction of his feet against the wall and his back against the wall are 0.8 and 0.6 respectively. What is the minimum normal force he needs to apply to...

Homework Statement A parachutist is falling vertically with a uniform speed of 12 m/s. At the instant he is 50m above the ground, he drops a coin. (Ignore Air Resistance) A) What is the seed with which the coin strikes the ground? b) How long does it take for the coin to reach the ground...

hey guys, i studied "applied maths" in "high school" [the irish version!] we studied projectile motion and velocity vectors etc, we worked on the premise that gravity affects only the verticle velocity of the projectile so that: for a projectile given an initial velcoity both horizontally...

I want to move 30lbs vertically on a platform. To do this I will have a rotating threaded rod driven by a motor. How much torque, hp, rpm do I need? I'm guessing the pitch of the threads will be important. As far as speed goes, I only want the platform to move about an inch in 1-2 seconds...

Homework Statement A kangaroo jumps to a vertical height of 2.8m. How long was it in the air before returning to Earth? Homework Equations delta y= Vot + 1/2at^2 The Attempt at a Solution I had to get t by itself so I rearranged the equation to say: t= delta y/.5(9.8) all under...

(I have already posted this problem in the physics help, but it is more math than physics, so I am also posting it here) For a physics experiment, we had to take a kong (dog toy with a rubber ball on the end of a rope), twirl it and then throw it as far as we could. We were told to record how...

[SOLVED] Vertical Circular Motion & Centripetal Acceleration Homework Statement 1) A car travels at a constant speed around a circular track whose radius is 2.1 km. The car goes once around the track in 410 s. What is the magnitude of the centripetal acceleration of the car? Homework...