Ball Definition and 999 Threads

Hi everyone, For an experiment I wanted to investigate the forces acting on a ball when rolling down an incline. Basically I have a wooden incline with a photogate at the bottom to measure the velocity of the ball at the bottom of the ramp. At the top of ramp the sphere has potential energy...

Homework Statement A peaked roof is symmetrical and subtends a right angle, as shown. Standing at a height of distance h below the peak, with what initial speed must a ball be thrown so that it just clears the peak and hits the other side of the roof at the same height? Diagram...

Homework Statement A ball is thrown upwards at 20 m/s at an angle of 15 degrees to ground. How long until the ball touches the ground? Givens for vertical: Acceleration = -9.8m/s2 v1= 5.2 m/s (20SIN15) v2=0 displacement=0 t=? Givens for horizontal Acceleration= 19.3 m/s (20COS15)...

I am making a game where a ball rolls along the ground collecting coins. The ball is inside four walls. I want to know what the equation for the ball hitting the wall and coming back is. I want the speed and to find the angle aswell. The ball stays at a solid speed of 10 and has a mass of 1 kg...

Homework Statement A ball of mass 65 g is thrown vertically upwards from ground level with a speed of 16 m s–1. Air resistance is negligible. The ball takes time t to reach maximum height. For time t 2 after the ball has been thrown, calculate the ratio of the potential energy of ball to the...

Homework Statement A ball of mass M and radius R can rotate round an axis through it's center. a bullet of mass m travels with speed v, hits the ball near the surface and gets stuck in it. What's their angular velocity after the collision. Homework Equations Moment of inertia of a ball round...

Homework Statement A ball of mass m rotates without sliding at velocity v1 and hits a wall. it rotates backwards at velocity v2. what is the energy loss. Homework Equations Kinetic energy of a rigid body: ##E=\frac{1}{2}I\omega^2## Moment of inertia of a ball round it's center...

Homework Statement For part aiii), the mark scheme states "Use of set squares to indicate height". I know what are set squares, but how does it aid to determine the rebound height, h? I thought set squares are to ensure two objects are perpendicular to one another? How does it help in...

A ball travels vertically downwards until it hits a concrete floor with speed 16.1-m/s. It then bounces vertically upwards at 3.4-m/s. Examination of a high speed video shows that the collision took 1.1-ms. Considering just the collision, what is the magnitude of the average acceleration? b)...

Homework Statement A rod of length L hangs on a nail. a ball of mass m hits and sticks to it. the rod rotates to angle θ. What is the velocity of the ball and what's the loss of energy. Homework Equations Kinetic energy of a rigid body: ##E=\frac{1}{2}I\omega^2## Angular momentum...

Homework Statement : [/B]I asked a question on this topic before, but I want to make sure I know the material well. So, I looked up another question similar to it (and a little more complex) to check my understanding. Here is the practice problem: A board with mass M, when placed into a coil...

Homework Statement During a game of billiards, a white cue ball traveling at speed v strikes a green ball that was initially at rest. The green ball's speed after the collision is twice the speed of the white ball after the collision. The billiard balls have equal mass. What is the angle...

Suppose I first charge a capacitor so that one plate is positively charged and another negatively. Now I remove the charging source and ground only one of the terminals say negative terminal, will there be a net positive charge in the capacitor that can be detected by a pith ball? Can a...

Assuming air resistance, when a tennis ball and a feather are dropped from the same height? Which statement is true: A: Tennis ball has more mass so it will fall faster. B: Tennis ball has less surface area so it will fall faster I think the answer should be A, but the textbook say B is true...

Homework Statement You hit a golf ball (mass 50g) squarely with the club face from ground level on a flat golf course. The ball leaves the club at an angle of 20 degrees above horizontal and travels 250m before hitting the ground. The force vs time graph below shows the force exerted on the...

An open elevator is moving with an upward velocity of 0.52ms-1 with an upward acceleration of 2.4ms-2. A ball bearing then rolls off the floor with zero horizontal speed. Determine the speeds of ball bearing and elevator 2s after the ball rolls off the floor. Using v=u+at, speed of ball bearing...

Respected all my bros,, I want to creat force of 3000 joul to push the iron ball of 100 gm? The ball should go straight upto 10 meters at speed of 700 miles per sec.

Homework Statement A small ball has mass 3.4x10^-8 kg and charge of 2.0x10^-5 C. It enters a box with initial speed 1.2x10^4 m/s. The point where the charge leaves the box is at a voltage 350kV higher than the entry point. Find the speed of the ball as it leaves the box. [/B]Homework Equations...

Homework Statement Starting from rest, a child throws a ball of mass m with an initial speed v , at an angle B with the horizontal direction. The child then chases after the ball, accelerating at a constant acceleration a . If the child wants to catch the ball at the same height as it was...

Greetings, I have a question about the classic Archimede's principle. A ball inflated with air will not sink into water. My understanding is that it will be pushed from all directions by the surrounding water trying to fill the space occupied by the ball. So there will be a pressure downwards...

Homework Statement In the figure, a 0.400 kg ball is shot directly upward at initial speed 40.4 m/s. What is its angular momentum about P, 6.65 m horizontally from the launch point, when the ball is (a) at maximum height and (b) halfway back to the ground? What is the torque on the ball about P...

Homework Statement Ball of mass M collide two balls of mass m , elastic collision . initially, M has velocity v , and two balls are stationary. after the collision the two masses move ,like in figure , v_a , v_b / What is the velocity V ,of mass M after the collision ? Homework...

So I just finished reading my textbook on special relativity and am a bit confused by the discussion of time dilation. We equip an observer with a light source, a mirror, and a clock and herd him onto a train moving at constant velocity relative to a second observer located at the station. If...

I have been trying to understand the wave function around an atom.. Is it more like a soccer ball where the shell is smooth but is more likely to be found in say the dark areas, or is it more like a golf ball where it is not only angularly undulating, but also radially undulating?

Homework Statement A ball bounces down a uniform flight of stairs of height [FONT=Book Antiqua]H , rising after each bounce to to the level [FONT=Times New Roman]h of the previous stair . the velocity of the ball before the impact is equal in all the impacts . what is the average power of...

Hi all, I'm working on a problem from the Feynman exercise book, and have been racking my brains for an answer, so would really appreciate some help here. The problem seems simple enough: A ball with a 3cm radius, weighing 1kg rests on an inclined plane (angle alpha) and also touches a...

Hello, 1. Homework Statement A spherical continuous ball is sliding with a constant velocity v along a frictionless lane. Thereafter it enters an inclined surface (the angle between the surface and the horizontal plane is α) with the coefficient of friction µ between the ball and the surface...

Hi, I've been wondering is there anyway of calculating the angular speed of a ball after there is a collision of it and another mass. For example a baseball bat hitting the ball. I have not looked up on angular momentum, but is angular momentum involved in this? Based on common sense, I think...

1. A cannonball is fired toward a vertical building 400 m away with an initial velocity of at 36.9° above the horizontal. The ball will hit the building in A. 4.0 s. B. 5.0 s. C. less than 4.0 s. D. more than 5.0 s. 2. If the cannonball in the previous question is fired horizontally from a...

Homework Statement Objects A and C are made of different materials, with different “springiness,” but they have the same mass and are initially at rest. When ball B collides with object A, the ball ends up at rest. When ball B is thrown with the same speed and collides with object C, the ball...

Homework Statement A ball of mass m and radius r starts off on top of a fixed ball of radius R. it rotates down without slipping. What's the ball's center of mass velocity as a function of θ. The angular velocity is ω. Homework Equations Moment of inertia: ##I=\frac{2}{5}mr^2## Potential...

Homework Statement Imagine that you are flying on an airliner on a long flight to Europe at a constant speed of 300 m/s a) you throw a ball towards the back of the plane at 20 m/s. You then shine a beam of light towards the back of the plane. How will these two things i) the ball and ii) the...

Homework Statement Why does a ball bounce less and less high, even though the force exerted by the ground on the ball is the same, due to Newton's third law. I do understand the ball loses energy as heat energy. Homework Equations F=ma ; F1=-F2 The Attempt at a Solution I'm just curious why...

Homework Statement A ball A is thrown upward to a height H with a velocity of 20m/s, another ball B is thrown down from H with a velocity of 20m/s and a third ball C is just dropped from the same height. Find which ball has the maximum velocity when it hits the ground.Homework Equations...

Homework Statement Assume that a ball of charged particles has a uniformly distributed negative charge density except for a narrow radial tunnel through its center, from the surface on one side to the surface on the opposite side. Also assume that we can position a proton anywhere along the...

Homework Statement [FONT=Arial]A ball (like the one used in lectures) generating a sound with a frequency of 594 Hz is swung around in a large circle with a radius of 1.49 m. The time it takes the ball to travel around one complete circle is measured and found to be 0.96 s. the speed of sound...

Hi guys, My logic is obviously flawed here I'm just not sure what I'm missing. I'd love a hint but don't tell me too much as I want to try to figure this out once I'm heading in the right direction :) I'm really upset with myself that I couldn't solve this, so I'd love more SHM problems to...

Imagine a football(soccer) ball passing next to you with a speed of 340 meters per second. Would you be able to see that? I would like to ignore realistic details as the ball burning or leaving trails etc. I'm just interested if I would be able to see the actual ball passing next to me at that...

I am working with a set of alloys that must first be ground up in a ball mill at cryogenic temperatures. It is important that no contamination makes it into the material and careful steps are taken to ensure this end. Unfortunately when we ran a set of samples through our RBS lab and then again...

Homework Statement This is not exactly homework, but is homework level so this is probably the best place to ask rather than the more learned sections. However, I'm prepared to defer to your better judgement. I want to put a web camera inside a foam ball. The camera is a retail product so...

Throwing a ball which is (m)kg on the ground If the velocity of the ball just before it reaches the ground is (v)m/s Assume it is a elastic collision The velocity of the ball when it leaves the ground should be (-v)m/s According to conservation of momentum,the ground has a change of...

Homework Statement A ball of mass m1 is aligned above a ball of mass M2 (with slight separation), and the two are dropped simultaneously from height h. (Assume the radius of each ball is negligible compared to h.) (a) If M2 rebounds elastically from the floor and then m1 rebounds from M2, what...

Homework Statement I want to find the equations of motion for a ball traveling down a cycloid under gravity so I can model the brachistochrone problem on matlab. I've looked online everywhere and can only find the equations for x and y with respect to theta (of the cycloid). I'm guessing then...

Homework Statement [/B] I'm trying to write a program in MATLAB which demonstrates a tautochrone curve and how the starting point of a ball is irrelevant as to the time it takes to get to the lowest point in the curve (without friction). At the moment I'm just trying to model it using a simple...

My question is the following. A ball is initially skidding and eventually starts rolling on a flat plane with friction, and later comes to a halt. Which direction does friction act? (see diagram) If friction acts to the right, then the translational speed will go up, and that's not right...

There is a question i have done in my textbook and it initially asks you to calculate: the maximum height of the ball, and how long it takes to arrive at that maximum height. They give you a vertical velocity component of 5m/s. So i made an equation using t= (v-u)/a Which gives me...

Homework Statement A ball, which is launched in the air with velocity V, has inelastic collisions with the floor: the kinetic energy after each collision is k times the kinetic energy before the collision, where k<1. Assume that the gravitational acceleration is constant: g [m/s^2]. I was asked...

Homework Statement A cannonball is fired with a velocity of 125 m/s at 25.0° above the horizontal a) Determine the horizontal and vertical components of the initial velocity. b) Determine the maximum height the cannonball reaches in its path c) Determine the time it takes to reach maximum...

Homework Statement A soccer player, kicking a soccer ball, gives the ball a velocity of +26.8 m/s. The mass of the ball is 0.425 kg, and the duration of the impact is 1.05  10–3 s. a) What is the momentum of the soccer ball after it has been hit? b) What is the change in momentum of the...

when a ball is thrown in upward direction --how can it be a negative displacement?