Height Definition and 1000 Threads

Homework Statement A ball is thrown upward in such a way that its speed is 32.3 m/s when it is at half its maximum height. Find (a) its maximum height, (b) its velocity 2.0 s after it's thrown, (c) its height 2.0 s after it's thrown, and (d) its acceleration at its maximum height...

Homework Statement Ball A is dropped from the top of a building of height h at the same time that Ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is twice the speed of B. At what height does the collision...

hi physics forum i am having a issue related to a tank size based on the flow rate and the diameter of the orifice. the dimensions would be the total height of the setup should be 1000mm the flow rate should be 525+/- 25ml/min the Internal diameter of the orifice is 4.3mm what would be...

Would a ball dropped vs launched(horizontally) have the same force of impact? (same starting height) I can't wrap my mind around this... I know there's no acceleration in the x-direction, yet I would imagine the launched object would have a greater force of impact. (negating the ball rolling...

Homework Statement 13. A box of mass m is released from rest at point A, the top of a long, frictionless slide. Point A is at height H above the level of points B and C. Although the slide is frictionless, the horizontal surface from point B to point C is not. The coefficient of kinetic...

According to my knowledge, I am able to apply Newton's second law on an egg for an egg drop; the resulted force from that can would be the force which occurs when it hits the ground. That force would also be reflected when it hits the ground according to Newton's third law. What is confusing...

Homework Statement A canon ball is fired from a canon upwards at an angle above the horizontal. a. Sketch a graph showing the height of this canon ball over time if it was fired at 30°, 45° and 60° above the horizontal. b. Sketch showing the acceleration of the canon ball over time if it was...

Hello all, I recently made some model rockets and thought it would be fun to predict their height before setting them off this weekend. I thought it would also be interesting to compare the difference in the predictions of a model with no drag and a model with quadratic drag. Surprisingly...

Homework Statement a cart slides down an iced incline that is 159m high. initial speed is 0m/s acceleration of gravity is 9.8 m/s^2 neglect friction, air resistance determine carts speed at the bottom of the hill Homework Equations v = u + at, but no time is mentioned v^2 = u^2 + 2ah...

Hi, how does an adjustable chair/microscope work? I need to make an adjustable height box, and I need some basic understanding of the design. -Gary

Homework Statement A daredevil on a motorcycle leaves the end of a ramp with a speed of 39.0 m/s as in the figure below. If his speed is 36.7 m/s when he reaches the peak of the path, what is the maximum height in meters that he reaches? Ignore friction and air resistance. Homework...

Homework Statement Consider a frictionless roller coaster. The acceleration due to gravity is 9.8 ms-2. Passenger cars start at point A with zero initial speed, accelerate as they go down to a point B, swing around the vertical circular loop B-C-B of radius 15m, then go on towards further...

An ant is trying to climb out of a semi spherical bowl that has a radius of 10cm. The static coefficient is .03. How high can the ant reach before it slides back down to the center of the bowl.

Homework Statement A projectile is fired across a horizontal flat plane. Its initial velocity is 25.5 m/s and is fired at an angle of 31.8° above the horizontal (a) How long does it take to get to the maximum height? (b) What is the maximum height? (c) Determine the horizontal and...

Homework Statement Ok, so pretty much, I built an air cannon for my physics assignment. I need to determine the muzzle velocity. I know the angle of the barrel, the height of the muzzle about the ground and the distance the projectile covered. I fired projectile at multiple pressures in order...

ok I am trying to find out how to work out the intial velocity of a projectile dropped from a height h and reaches a distance s. say a ball thrown from a height of 2.8 metres and reaches a distance of 3 metres. I want to be able to work it out WITHOUT having to work out the time. so...

1. A third baseman makes a throw to first base 38.6 m away. The ball leaves his hand with a speed of 38.0 m/s at a height of 1.4 m from the ground and making an angle of 24.2 degrees with the horizontal. How high will the ball be when it gets to first base? 2. d=V0(t) + 1/2(g)(t^2)...

Projectile Motion - V0 is 5 times v @ max height?!? Thanks prior, all... Homework Statement A projectile's launch speed is 5 times its speed at maximum heigth. Find launch angle theta0. Homework Equations Not sure which are relevant on this one, but the given for the section are...

1. To Find The Height Of a Room by an Experiment using Simple Pendulum MATERIALS REQUIRED A simple pendulum, metre scale, stop clock, bobs of different masses, wooden blocks, a long string which has greater than the height of the laboratory. INTRODUCTION The period of a simple pendulum...

Find the height or length of these of these natural wonders in kilometers , meters , and centimeters . (a)The longest cave system in the world is the Mammoth Cave system in Central Kentucky. It has a mapped length of 384 miles (b)In the United States , the waterfall with the greatest...

A 65.0 kg student climbs a set of stairs in 25.0 s with a power output of 95 W. What is the vertical height of the stairs? I came up with the formula: W=P x (delta t) W=95w(25.0s) 2375 Im not sure how this comes into play: W = mg (delta h) Im really confused :|

Homework Statement what is the flux entering a cone of radius r and height h located in a uniform electric field E parallel to its base? Homework Equations flux = E.ds The Attempt at a Solution

Hello; According to the GPE formula you gain gravitational potential energy as you go higher up (further from the centre of gravitation). Does this mean that your mass increases with distance? Thanks.

Homework Statement A hiker is at the base of a mountain and can get the horizantal distance between himself and the peak through GPS device:750 m. And suppose we know the actual measurements: It's a right triangle with an opposite= 750 tan (pi/6) = 433 m , an adjacent= 750 m, and a...

Homework Statement A 10-g bullet moving at 1000 m/s strikes and passes through a 2.0 kg block initially at rest as shown in the diagram. The bullet emerges from the block with a speed of 400 m/s. [PLAIN]http://img34.imageshack.us/img34/554/82265240.gif To what maximum height will the...

A 48 kg skier starts from rest at a height of H = 28 m above the end of the ski-jump ramp. As the skier leaves the ramp, his velocity makes an angle of 28° with the horizontal. Neglect the effects of air resistance and assume the ramp is frictionless. Could u give me a formula i need to start...

if an unlimited source of water was dropped twenty meters directly downwards into a meter cubed steel box through a hose, would there be the same psi in the box as there would be twenty meters under the sea?

Homework Statement The U-shaped tube in the figure has a total length of 1.0 m. It is open at one end, closed at the other, and is initially filled with air at 20C and 1.0 atm pressure. Mercury is poured slowly into the open end without letting any air escape, thus compressing the air. This is...

A 65.0 kg student climbs a set of stairs in 25.0 s with a power output of 95 W. What is the vertical height of the stairs? Im not quite sure where to start with this one?

Homework Statement A ball of mass m is launched at an angle theta from a spring gun of length D. The lower end of the gun, where the spring is attatched, is at ground level. The spring has spring constant k and an unstretched length D. Before launch, the spring is compressed to a length d...

Homework Statement Triangle ABC formed by two vectors a = ( 2, 10, 25 ) and b = ( 5, 4, -2 ) attached at a point A. The area of the triangle is (81 root 5) / 2 And I need to find the length of the height AM (AM perpendicular to BC and the point M belongs to the line BC). Don't know where to...

Homework Statement Two 54kg blocks are held 30cm above a table. As shown in the figure, one of them is just touching a 30cm long spring. The blocks are released at the same time. The block on the left hits the table at exactly the same instant as the block on the right first comes to an...

Homework Statement "The initial speed of a stone projected vertically upwards is 21.0m/s a)What is the maximum height it will reach? b) How long does it take to reach the highest point and what is the total time which it is in the air?" Relative information: a=9.8 m/s/s u=21.0...

Homework Statement A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised bottle to a needle inserted in the vein. The inside diameter of the 4.07 cm long needle is 0.388 mm and the required flow rate is 3.90 cm3 of blood per minute. How high should the...

Hi, you no those pens, that you have to push the top down, which is loaded with a spring to use? Well I was wondering if I released it on my desk how high would the pen travel? I know that the spring PE=0.5kx^2 and the the spring force is F=Kx, but not sure were to go from there? Thanks James

Homework Statement Hey guys! I am doing a very simple lab, and in need of your expertise! Haha, I am an intro-physics student, please don't get too complicated with me, my knowledge is very limited. The QUESTION is: WHAT IS THE RELATIONSHIP BETWEEN EFFICIENCY VS HEIGHT...

Homework Statement A rock is thrown from the edge of the top of a building with an initial velocity of 12.2 m/s at an angle of 53 degrees above the horizontal. The rock strikes the ground a horizontal distance of 25 m from the base of the building. Assume that the ground is level and that...

Hi, I am calculating about Drive Brake system. Now I am stuck at Hg (I mean car's center gravity of height), I just don't know how to calculate it. Will anybody help me ? I am really need it I look forward to your reply Best Regards,

Homework Statement Your friend is 1.7 m tall. What is the height of her image when she is 4.2 m from you? Homework Equations I used di/do and multiplied that by the height of the friend The Attempt at a Solution I did (4.2/3.5)(1.7) but it was wrong. Not really sure what I'm...

Homework Statement An object is located 27.5 cm from a certain lens. The lens forms a real image that is twice as high as the object. b) Now replace the lens used in Part A with another lens. The new lens is a diverging lens whose focal points are at the same distance from the lens as the...

Homework Statement A) Determine the image distance and image height for a 5-cm tall object placed 10 cm in front of a concave mirror having a focal length of 15 cm. B) Determine the image distance and image height for a 5-cm tall object placed 45 cm in front of a concave mirror having a...

Homework Statement You are 1.9 m tall and stand 3.5 m from a plane mirror that extends vertically upward from the floor. On the floor 1.5 m in front of the mirror is a small table, 0.80 m high. a) What is the minimum height the mirror must have for you to be able to see the top of the...

See the diagram attached. I am trying to find the height marked with a red arrow to height where the ball on top is resting. Each ball has a radius of 1cm... How would you do this. I thought it may be something to do with the surface area or volume, do worked with the SA and Volume eauations...

Homework Statement Caution: Ignore the weight of the bucket itself. The bottom and the top of a bucket have radii rb = 15 cm and rt = 26 cm respectively. The bucket is h = 36 cm high and filled with water. Where is the center of gravity relative to the center of the bottom of the...

Homework Statement Hint: Disregard any dissipative effects of the atmosphere of the planet. A projectile is launched from the surface of a planet (mass M, radius R) with a launch speed equal to 61 percent of the escape speed for that planet. The projectile will rise to a maximum height...

Flow rate, time, height in MATLAB? Homework Statement A tank vertical sides and a bottom area of 100ft^2 is used to store water. The tank is initially empty. To fill the tank, water is pumped into the top at a rate given in the following table. Determine the water height h(t) at t= 10 min...

Homework Statement A hole is drilled through the center of a ball of radius r, leaving a solid with a hollow cylindrical core of height h. Show that the volume of this solid is independent of the radius of the ball. Homework Equations V = \int_{a}^{b} 2\pi x (f(x) - g(x))...

Homework Statement So if a rocket is launched vertically from the surface of the earth, the rocket has a mass of 1000 kg and has a fuel load of 12000 kg. The fuel burns at such a rate that it will be exhausted after 180 secs. The exhaust velocity of the burned fuel relative to the rocket is...

Homework Statement A column of water contains fine metal particles of radius 20nm, which are in thermal equilibrium at 25°C. The density of the metal is 2\times10^{4} kg m^{-3}. If there are 1000 particles per unit volume at given height, what will the particle density per unit...

Homework Statement A projectile os launched with velocity of 200m/s at an angle of 45deg to the horizontal. Calculate: a) the maximum height reached b) the time of flight c) the range Homework Equations v^2=u^2+2as s=ut+1/2 at^2 The Attempt at a Solution I know the first 2 but...