Height Definition and 1000 Threads

http://home.cc.umanitoba.ca/~loly/102-dec_word.pdf The above is a link to the problem - Question #3. Homework Statement A glass tube has several different cross-sectional areas with the values indicated in the figure. A piston at the left end of the tube exerts pressure so that the mercury...

Homework Statement A child and sled with a combined mass of 50.0 kg slide down a frictionless hill. If the sled starts from rest and has a speed of 12.0 m/s at the bottom, what is the height of the hill? Homework Equations KE = 1/2 m v^2 PE = mgh The Attempt at a Solution KE = 1/2...

you are standing on top of your snow fort, defending yourself from a horde of evil attackers. if you hurl a 2.1 kg slush ball at an angle of 35 degrees from the horizontal, and a velocity of 15 m/s, how far will it travel before it hits the ground? assume you launch it from a height of 1.6 m...

Homework Statement 79kg person jumps from a platform that is 100m above the water. He is attached by a bungee chord with sprint constant 40 N/m and length 35 m. Now he jumps off. How far is he above the water now when the chord has reached maximum elongation Homework Equations F=ma...

Homework Statement Let y be the the solution of the initial value problem. The maximum value of y is? y" + y = -sin(2x) y(0) = 0 y'(0) = 0 Homework Equations N/A The Attempt at a Solution Factor out original equation to find general equation. r2 + 1 = 0 r = 0 + i; 0- i Thus...

Good day, I have a homework problem I'd like help with. I got into getting the impulse (not sure if correct, though), but don't really know how to get the rest of the things. Any tips on what direction I should be going are appreciated. Homework Statement Starting from rest, 65kg athlete...

Homework Statement A helium filled balloon is tied to a 2.00-m-long, 0.050 0-kg uniform string. The balloon is spherical with a radius of 0.400 m. When released, it lifts a length h of string and then remains in equilibrium as shown in figure P14.51. Determine the value of h. The envelope of...

[b]1. A model rocket with a mass of 4.3kg is launched straight up at a speed of 65m/s. Kinetic energy when it takes off is 9083.75 J. Total energy when it takes off is also 9083.75J. When the rocket reaches its maximum height, what is its kinetic energy? [b]2. KE(kinetic energy)=1/2MV^2...

Homework Statement Radio waves from a star, of wavelength 231 m, reach a radio telescope by two separate paths. One is a direct path to the receiver, which is situated on the edge of a cliff by the ocean. The second is by reflection off the water. The first minimum of destructive...

Homework Statement A hydraulic lift has two connected pistons with cross-sectional areas 25 cm2 and 250 cm2. It is filled with oil of density 510 kg/m3. a) What mass must be placed on the small piston to support a car of mass 1200 kg at equal fluid levels? I got this answer - 120 kg...

Homework Statement What is the maximum height that the body reaches when thrown vertically upwards from the surface of the Earth at a velocity of 5km/s, if we neglect the impact of the atmosphere? The radius of the Earth is r= 6400km; the acceleration of gravity on the surface is g = 10...

Homework Statement Given your assigned projectile launcher determine the muzzle velocity. angle of launcher = 45degrees distance to bottom of barrel = 25.6 cm distance traveled when fired = 119.2cm Ignore Air resistance Homework Equations I don't know where to start since I have...

Hello! My question is...What is the maximum height obtained by a 125 g apple that is slung from a slingshot at an angle of 78 degrees from the horizontal with an initial velocity of 18 m/s? Thanks!

Problem: An 8 m, 200 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is .45, and the ladder makes a 60 degree angle with the ground. How far up can an 800 N person climb before the ladder begins to slip? a. 7.8 m b. 6.8 m c. 5.8...

Homework Statement A ball having mass 1.2 kg is connected by a string of length 1.6 m to a pivot point and held in place in a vertical position. A constant wind force of magnitude 23 N blows from left to right.If the mass is released from the vertical po- sition, what maximum height...

Homework Statement A block of mass 20 g sits at rest on a plate that is at the top of the fluid on one side of a U-tube as shown below. The U-tube contains two different fluids with densities ρ1 = 1090 kg/m3 and ρ2 = 595 kg/m3 and has a cross sectional area A = 4.7 10-4 m2. The surfaces are...

I could use some help starting and solving this problem. It is due tonight. Any help would be appreciated. A 190 ball is dropped from a height of 1.8 and bounces on a hard floor. The force on the ball from the floor is shown in the figure (use the link). How high does the ball rebound...

1. A container of uniform cross-sectional area A is filled with liquid of uniform density rho. Consider a thin horizontal layer of liquid (thickness dy) at a height y as measured from the bottom of the container. Let the pressure exerted upward on the bottom of the layer be p and the pressure...

Homework Statement Mass of person jumping off bridge = 60 kg The bridge is 60m above the river The cord only starts stretching after he falls 20m. k = 50 N/m Homework Equations gravitational potential energy = mgh elastic potential energy = (1/2)kx^2 The Attempt at a Solution...

Homework Statement A bale is 0.25 m wide, 0.50 m high, and 0.80 m long, with mass 30.0 kg. The center of gravity of each bale is at its geometrical center. It is dragged along a horizontal surface with constant speed by a force \vec{F}. The coefficient of kinetic friction is 0.35. A) Find...

Homework Statement Gravitational roller coaster makes a circular loop of radius 8 m. - What should the minimum height be for the roller coaster to make the loop without falling at the top? - What is the velocity of the cart in the point B, after it finishes the loop? (See picture) - What is...

Homework Statement Consider the earth’s atmosphere assuming it is a mixture containing 79% N2 and 21% O2 gas. Furthermore, assume that the atmosphere is at an average constant temperature of 10o Celsius and that the acceleration due to gravity is g = 9.81 ms-2. Using the barometric height...

Homework Statement "A golfer can hit a golf ball a horizontal distance of over 300m on a good drive. What maximum height will a 301.5m drive reach if it is launched at an angle of 25 degrees to the ground? Here's a second problem I got right: "A quarterback throws the football to a stationary...

Homework Statement Consider a frictionless track. Imagine point A to B is one quarter of a circle; point B to C is a horizontal flat plane; point C to D is also one quarter of a circle. The block m1 is released from A. It makes a head-on elastic collision at B with m2 (that is initially...

1. An object of mass 1.2kg is fired vertically in a barrel velocity 25n acting over a period of 0.25 seconds, calculate A) The velocity when leave the gun. B). Height reached. C). Time taken to return to initial height. 2. a= f/m, V^2=U^2+2as 3. A), A=F/M for acceleration, 25/1.2=...

I have a very simple question. If I know that a projectile reaches a maximum height of 15m from its launch point, how to I work out the original speed and the time of flight given the only force is the downward acceleeration due to gravity. I'm sure its very easy, but I can';t remmeber the...

Hello. I went to get a new router because I finally decided to get wireless. I got a Linksys WRT120N which supposedly has a decent range, according to the sellsman. On my apartment the router is about ten meters and has a couple walls between it and the computer. The computer receives really...

Homework Statement An arrow is shot at 30.0° above the horizontal. Its initial speed is 50 m/s and it hits the target. (a) What is the maximum height the arrow will attain? (b) The target is at the height from which the arrow was shot. How far away is it? Homework Equations SOH...

1. A man is working in a building when he drops a screwdriver from the top, mass 400 grams, from a height of 40metres. Assuming g = 10N/kg a)If the screwdriver loses 95% of its kinetic energy as heat and sound when it hits the ground, what will be the height of its first bounce? 2...

When a body is fired upward with escape V (i.e 11.2 km/s) then what will be the height when the body leaves the gravitational field? I found by using formula 2gh=Vf^2 - Vi^2 keeping vf= 0 and vi=11200m/s then I got h=6400km= radius of the earth. Is it range of the gravitational field?

Homework Statement 0.25-kg skeet is fred at an angle 30 to horizontal with a speed 25m/s. when it reaches tha max. height, it is hit from below by a 15g pellet traveling verticaly upwared at speed of 200m/s. the pellet is embedded to the skeet. 1) how much higher did the skeet go up? 2) how...

Homework Statement A tank in the form of a right-circular cylinder standing on end is leaking water through a circular hole in its bottom. When friction and contraction of water at the hole are ignored, the height h of the water in the tank is described by: \frac{dh}{dt} =...

Homework Statement A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.00 m/s at an angle of 16.0° below the horizontal. It strikes the ground 5.00 s later. (Ignore air resistance.) (b) Find the height from which the ball was thrown...

Homework Statement Hello, I need to solve a problem which involves a projectile being fired at a target that is at a different height. Given a firing angle, the distance the projectile needs to needs to travel and gravity, i need to compute the flight time and initial velocity needed to...

Homework Statement A flowerpot falls past two meter tall window in ¼ of a second. From what height did the flowerpot fall? Homework Equations To calculate the velocity of the pot while this is passing the window: v = d/t To calculate the height: v^2= v0^2 = 2gh → h= (v^2 - v0^2) / 2g...

Homework Statement Show that the variation of gravity with height can be accounted for approximately by the following potential function: V(z)=mgz(1-z/R) Where R is the radius of the Earth and z the height above the surface. Homework Equations r=R+z V=-GmM/r F=GmM/r^2 The...

Homework Statement A flowerpot falls past two meter tall window in ¼ of a second. Homework Equations From what height did the flowerpot fall? The Attempt at a Solution

Homework Statement I want to try to find the scale height of a planet using H=kT/Mg, where H is the scale height, k is the Boltzman constant, T is the surface temperature, g is the acceleration of gravity, and M is the mean molecular mass. I am having a great deal of trouble understanding...

Homework Statement Girl kicks ball straight up, makes contact with ball 1 m above ground, initial velocity = 3 m/s a.) How high does the ball go? b.) How long until it hits the ground? c.) If she had given it an initial x-component of velocity of 2 m/s (same y-component), how far would the...

A model rocket is launched with an upward acceleration, after t seconds it runs out of fuel at x height. Sketch the a vs. t, v vs. t, and position vs. t graphs for the rocket from the time of launch until the moment it reaches max height. -I know that after the rocket runs out of fuel it will...

Sorry for the re-post Homework Statement...

Homework Statement If a wood with loft 18 degrees is used to hit a ball that is in the air for 10.9 s, calculate: (a) The distance the ball travels if its intial velociity is 18.5 m/s. (b) The maximum height of the ball Homework Equations The Attempt at a Solution

Homework Statement A liquid-level transducer consists of two parallel plates of conductor immersed in an insulating liquid. When the tank is empty the capacitance of the plates is 200pF. The relative dielectric constant of the liquid is 25. Determine an expression for the capacitance C as a...

Homework Statement A hot-air balloon is floating above a straight road. To estimate their height above the ground, the balloonists simultaneously measure the angle of depression to two consecutive mileposts on the road on the same side of the balloon. The angles of depression are found to be...

Homework Statement Suppose water is leaking from a tank through a circular hole of area Ah at its bottom. When water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cA_{h}\sqrt{2gh}, where c (0 < c < 1) is a...

Homework Statement A small dense ball with mass 1.5 kg is thrown with initial velocity <5,8,0> m/s at time t= 0 from the origin (<0,0,0> m) Air resistance is negligible. When the ball reaches its maximum height, what is its velocity? Homework Equations Momentum Principle Average...

Homework Statement A golf ball with an initial angle of 33◦ lands ex- actly 184 m down the range on a level course. The acceleration of gravity is 9.81 m/s2 . a) Neglecting air friction, what initial speed would achieve this result? Answer in units of m/s. 009 (part 2 of 2) 10.0 points...

Homework Statement I know the base of the trapezium is 20km long. I also know the area of it has to be 1x10^5 m^3. I was just wondering how would you be able to calculate the height of the trapezium without knowing the length of the top line, i want to do it so the height is maximised at...

Homework Statement A basketball player shoots the ball at a height of 1.7m at an angle of 60 degrees into a hoop. The range is 10ft or 3.05m. The height from the ground to the top of the hoop is 10ft or 3.05m. What is the initial velocity m/s to make it to the hoop? Homework Equations...

Homework Statement My lab partner and I were to find the optimum angle a nerf gun could be fired at to provide the longest distance from the starting point. We also need to calculate the initial velocity of the projectile and the range and height the projectile should have reached for each...