Horizontal Definition and 960 Threads

A hiker plans to swing on a rope across a ravine in the mountains, as illustrated in the figure, where L = 4.9 m and x = 2.7 m, and to drop when she is just above the far edge. At what minimum horizontal speed should she be moving when she starts to swing(in m/s)? I tried using the...

Homework Statement A small rock of mass m is kicked from the edge of a perfectly vertical cliff of height h, giving it an initial velocity ~vo that’s purely horizontal. The rock lands at a distance d away from the bottom of the cliff. The ground there is assumed horizontal and we neglect air...

We have a spring-mass system which oscillates in one dimension on a frictionless horizontal surface. We act an external force on the mass. F=kχo sin(ωt). Let x=Asin(ωt+φ),A>0 and ωο is the natural frequency of the system. a) What is the phase of the motion of the mass relatively to the phase of...

3. A 52.3-kg trunk is pushed 5.95m at constant speed up a 28.0 degree incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is .19 . Calculate the work done by a) the applied force and b) the force of gravity. Fy = N - mgcos28 = 0 Fx =...

Homework Statement An air track glider attached to a spring oscillates with a period of 1.5s AT t= 0s the glider is 5.0 cm left of the equilibrium position and moving to the right at 36.3 cm/s so from what the question i have determined that T = 1.5s x= -0.05m V_x = 0.363m/s t = 0 Find...

Homework Statement A box (mass = 50.0 kg) is being pulled up a ramp at an angle of (27 ⁰) by a horizontal force, (F→). Given that the coefficient of kinetic friction for the ramp is 0.3, find the force, (F→) on the box. What is the reaction force on the box due to the tramp? (Identify...

[SOLVED] a question a railcart moves along a railway at constant velocity v_0 with a ball attached to its ceiling. at t=0 the ball is drooped from the ceiling and at the same time the railcart breaks are pushed creating deceleration such that its velocity is: v=v_0e^{ -pt}\hat{x} . h is the...

Homework Statement A 30 kg chandelier hangs vertically from a 4 m long wire. What is the horizontal force necessary to displace the chandelier 0.10 m either way? Homework Equations F=ma The Attempt at a Solution I tried to figure out the angle made by the change in the...

Homework Statement A block of mass m is attached to the end of a horizontally mounted spring as shown. The spring has a spring constant k and obeys Hooke’s law. The block is given an initial displacement xo, after which it oscillates back and forth without frictional effects. (a)...

centripetal accel -- airplane flying in a horizontal circle... Homework Statement An airplane is flying in a horizontal circle at a speed of 116 m/s. The 77.0 kg pilot does not want his centripetal acceleration to exceed 6.00 times free-fall acceleration. (a) What is the minimum radius...

Homework Statement A block of mass m lies on a horizontal table. Suppose you push horizontally with precisely enough force to make the block start to move, and you continue to apply the same amount of force even after it starts moving. Find the acceleration of the block after it...

Homework Statement A weightless ladder at 7m long rests against a frictionless wall at an angle of 65degrees to the ground. A 72kg person is 1.2m from the top of the ladder. What horizontal force at the bottom of the ladder is required to keep it from slipping? d= 7m m(man) = 72kg r(man) =...

Homework Statement Its not a very difficult problem, and I really only need to know 1 thing about friction; anyways, here's the summed up problem: (my teacher enjoys making us use constants instead of numbers btw) A horizontal force F is applied to a small block (mass m1), and it slides...

[SOLVED] Horizontal Speed of bullet fragment Homework Statement A 14-kg shell is fired from a gun with a muzzle velocity 125 m/s at 33o above the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the...

Homework Statement A 250 g block is resting on a frictionless horizontal surface. The block is attached to a spring. The mass-spring system is compressed by a 2.5 N force and then released from rest. (a) The resulting oscillation has a 1.0 s period. What is the spring constant? (b) What is...

Homework Statement There is a heavy box across the floor, and you apply a horizontal force just sufficient to get the box moving. As the box starts moving, you continue to apply the same force. Show that the acceleration of the box, once it gets started, is a=(us-uk)*g Homework...

[SOLVED] A woman pulls a suitcase..what is the angle with the horizontal? Homework Statement A woman at the airport tows her 20.0kg suitcase at constant speed by pulling on strap angle theta above the horizontal. She pulls on the strap with 35.0N force. The frictional force on suitcase is...

Homework Statement What would happen to the coefficient of friction if the applied force was not horizontal to the surface? Homework Equations Ff=_{\mu}FnThe Attempt at a Solution I am unsure of how to proceed with this question, but I am thinking that you can't have friction against a...

using \frac{v_0^2}{g_0}=R_{max} for this problem: You buy a toy dart gun and you want to calculate its Max Horizontal Range. You fire the gun straight upward and find that it takes 2.9 seconds for the dart to leave the barrel and then return to the barrel. Can this be done without the...

This is a general question and one that I cannot get an answer for. What is the difference between the 2? How do they alter how we approach to solve a problem for each type? Answers kindly welcomed

Okay here is the problem: A dart gun is fired while being held horizontally at a height of 1.55 m above ground level, and at rest relative to the ground. The dart from the gun travels a horizontal distance of 7.77 m. A child holds the same gun in a horizontal position while sliding down a 39.7...

A 125 kg mail bag hangs by a vertical rope 3.3 m long. A postal worker then displaces the bag to a position 2.0 m sideways from its original position, always keeping the rope taut. a)What horizontal force is necessary to hold the bag in the new position? b)As the bag is moved to this...

"At what points, if any, are the tangents to the graph f(x)=x^2-3x horizontal?" I know how to figure this out using a graphing calculator and using the 'short-cut' (nx^n-1), but I can't do it using limits. Help! I'd like to use the equation lim x->a = f(x) - f(a) / x - a Thanks!

Homework Statement A person standing on a cliff throws a stone with a horizontal velocity of 15.0m/s and the stone hits the ground 47.0 m from the base of the cliff. A. How much time does it take for the stone to hit the ground? B. How high is the cliff? C. What was the impact velocity of...

Homework Statement a person sstanding on a cliff throws a stone with a stone horizontal velocoty of 15.0m/s and the stone lands on the ground 47.0m from the base of the cliff. a. how much time does it take for the stone to hit the ground? b. how high was the cliff? c.what is the impact...

if an object is fired at a 20 degree angle and has a horizontal velocity of 30m/s, what is the vertical displacement, how long the ball is in the air, horizontal displacement, original velocity of the ball?

Homework Statement A simple pendulum (sting has no mass, no air resistance) has a weight on the end of mass m (unknown). The string has a length A horizontal (and always horizontal) force, F, acts on the weight, but it moves so slowly that acceleration is 0. a)What is the work done by force...

Homework Statement A man stands on the roof of a building of height 14.1 m and throws a rock with a velocity of magnitude 31.6 m/s at an angle of 25.0 above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. Calculate the magnitude...

Horizontal Projectile Motion Question...please help! 1. A ball is thrown horizontally from the top of a building 22.8 m. high. The ball strikes the ground at a point 52.1 m. from the base of the building. a. Find the time the ball is in motion. b. Find the initial velocity of the ball. c...

Want to make sure I'm doing this right... it seems too easy Homework Statement A horizontal rope is tightly tied to hooks between two walls separated by a distance of 5m. A 100N weight is suspended from the middle of the rope and it sags so that the middle of the rope is displaced a...

Homework Statement In general, I know that the dynamic equation of pendulum is theta'' + (k/m)*thata' + (g/l)*sin(theta) = 0 , where k=friction co, m=mass, l=length of string, g=gravity. But if the pendulum is placed in a constant draft, the equation has to be changed. Assuming...

A football is thrown upward at a(n) 43 degree angle to the horizontal. The acceleration of gravity is 9.8 ms^2 : To throw a(n) 77.8 m pass, what must be the initial speed of the ball? Answer in units of ms.

A mass is tied to a string and whirled in a horizontal plane. The tension in the string provides the centripetal force required for circular motion of the mass. But which force balances the weight mg of the mass?

Homework Statement A ramp is made by laying one end of a board on the level floor and the other end on top of a 4.0-foot-high wall, which is 8.0 horizontal feet away. A 3.0 foot-in-diameter ball is rolled under the ramp until it is wedged between the underside of the ramp and the floor. How...

Homework Statement The two hot-air baloons in the drawing are 48.2(Left) and 61.0(right) m above the ground. A person in the left baloon observes that the right baloon is 13.3 degrees above the horizontal. What is the Horizontal distance x between baloon the two baloons Left Air Baloon=...

What does it mean when an integral sign has a short horizontal line drawn on it?

I thought that horizontal asymptotes were asymptotes and now I'm hearing that they can be crossed... Is this true? If so, why and how? Okay, wait a second, I mean horizontal asymptotes. According to: http://www.purplemath.com/modules/asymtote2.htm "As I mentioned before, it is common and...

from Applied Mathematics and Modeling for Chemical Engneers (Richard G. Rice) Two vertical cylindrial tanks, each 10 m high,are installed side-by-side in a tank farm, their bottoms at the same level.The tanks are connected at their bottoms by a horizontal pipe 2 meters long,with pipe inside...

Here's the problem: 2 Battleships are traveling at the same speed and at the same direction. They both have the same range, i.e. they can both only fire a maximum distance which is the same for both of them. BB1 is in front of BB2, who is pursuing BB1. They are out of range. My...

Homework Statement A block with a weight of 2.9 N is at rest on a horizontal surface. A 1.3 N upward force is applied to the block by means of attached vertical string. (a) What is the magnitude of the force of the block on the horizontal surface? Homework Equations I'm not sure...

A bridge rises 321m above the Arkansas river. Suppose you kick a rock horizontally off the bridge. The magnitude of the rock's horizontal displacement is 45.0 m. Fine the speed at which the rock was kicked. (This is not what i ask you here) Does the ball travel 321m vertically in free fall...

Prove this... A particle of mass m is traveling along the x-axis with a constant horizontal velocity v0i. When the particle passes through the origin, it experiences a Drag Force which is proportional to the square of the particle's speed (F[SIZE="1"]d = - b/v^2i... drag coefficient b...

Homework Statement A hawk flies in a horizontal arc of radius 13.5 m with a speed of 3.9 m/s. What is its centripetal acceleration? (I correctly found this to be 1.1267 m/s².) Next question is: If it continues to fly along the same horizontal arc but increases its speed at a rate of...

Homework Statement The half a sphere with a 'm' mass and 'r' radius is equilibrated on a plan absolutely polished horizontal with the side of the AB wire. So the surface of the half a sphere has with the horizontal plan an alpha angle. Find, after the break of the wire, the velocity of the O...

Homework Statement A soccer player kicked a ball up at a 30-degree angle at 20 m/s. Find the hang time, max. height and horizontal range. Homework Equations x(sub y)=(1/2)at^2 + v(sub i sub y) Meaning... displacement = half of acceleration times time squared plus initial velocity in...

Homework Statement The inside diameters of the larger portions of the horizontal pipe in Figure P9.40 are 2.80 cm. Water flows to the right at a rate of 2.00 10-4 m3/s. Determine the inside diameter of the constriction. Answer in (cm) Here is the picture...

What causes the horizontal lines that move down a computer or TV screen when you video tape it?

https://chip.physics.purdue.edu/protected/IEalgebraMimg/uiuc101-09-block.ie/pic.gif A small block of mass 0.91 kg slides without friction on a horizontal table. Initially it moves in a circle of radius r0 = 0.63 m with a speed 1.5 m/s. It is held in its path by a string that passes through a...

1. A uniform 5m ladder of mass 12kg rests against a wall with its base 3m from the wall. A painter of mass 55kg sits 3.5m of the way up the ladder. what is the horizontal force in N exerted on the ladder by the wall? a)110.45 b)178.45 c)232.67 d)327.08 in the previous problem what is the...

Homework Statement A microwave's turntable spins 3.0 revolutions per minute. It has a 250.0g cup of coffee placed 15.0cm from its centre. Find its period of revolution, its tangential velocity and the centripetal force on the cup. 2. The attempt at a solution period of revolution...