Ball Definition and 999 Threads

The question is, Is the K.E. energy conserved during the collision ? Given Data : Collision is elastic, ball of same mass. P.S. It is asked if the K.E. is conserved DURING the impact; not before or after it. After the collision & before it, I know the K.E. is conserved.

Homework Statement A conductive ball of diameter 0.4 [m] is charged equally with a concentration of \sigma=8 [micro-coulon/m^2]. What's the total number of electric field power lines, N, that extrude from the ball Homework Equations The electric field near a conductor is like in a capacitor...

Homework Statement You swing a ball around a piece of string(vertically). M = 0.150kg r= 1.10m Calculate the Tention at the bottom of the arc assuming velocity is twice as fast. Homework Equations When I do the problem I'm not sure how to set up the NetForce = ma How do which force is...

I have a cricket ball and I place a dual axis accelerometer on it and throw is up in the air and catch it repeatedly. What would I expect its acceleration trace to look like. I am getting myself confused as I think there is an error in my trace.

Hi everyone, this problem involves smooth rolling and translational motion: 1. Homework Statement A bowler throws a bowling ball of radius R= 11 cm along a lane. The ball slides on the lane with initial speed vcom = 8.5 m/s and initial angular speed w0 = 0. The coefficient of kinetic friction...

Homework Statement When an object is static (not moving), forces and moments must balance to zero. A moment here is defined as the force applied to an object multiplied by the distance from the point of rotation (torque). A simple way of thinking about moment balances is to consider a seesaw...

1.Small ball with mass m falls from hight h. Find how velocity, acceleration and height depend on time. Air resistance is linear and depends on velocity ##F = kv##. 2. Air resistance ##F=kv## where ##k## is constant. 3. I do not know where to go after ##ma = mg - kv ##.

Homework Statement A ball was dropped through a known vertical distance with the time of drop also recorded. The aim of the task is to create a numerical model in excel in order to approximate the drag coefficient. Homework Equations This is my method. 1. FBD for the ball falling. (assume...

Hello, I've come across this toy called a "Switch Pitch" designed by Chuck Hoberman. It's a ball that when tossed into the air (with some amount of rotation), inverts and changes colour. Made of plastic, it's connected with numerous sockets and plates. It's quite hard to describe with words...

Hey all, I need to build a launcher that is capable of throwing a tennis ball over a 1 meter high wall and hit a target 2 meters away. I realize there are some threads already discussing this, but my question is more based on the type of launcher. Would a trebuchet or a spring powered cannon be...

Hi, I am trying to wrap my head around what happens when a ball of mass m bounces against a hard floor. I assume a system that includes the ball and the floor (and eventually the entire planet) and an elastic collision. Before the ball hits the floor it has a momentum of mv. After the bounce...

Homework Statement An astronaut in space weights 100 kg and is holding a cannon which can shoot a 10kg cannonball. The astronaut is moving at 10 m/s. The astronaut wishes to fire the cannonball such that he turns the maximum possible angle. Find this angle in degrees. Homework EquationsThe...

Hello guys, I'm curious in this phenomena: http://www.beaconlearningcenter.com/documents/492_01.pdf. In the second case, why don't the positive charges from pit ball move to the rod which is full of negative charges. If this happened, we would get a neutral rod and a negative pith ball... But...

A 1.2kg ball dropped from a height of 3m onto a steel plate rigidly attached to the ground bounces back up to a height of 2.5m.(a). What is the impulse delivered to the ball by the plate? (b). What is the coefficient of restitution of the collision?I know my instructor wants me to use something...

Homework Statement https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-xaf1/v/t1.0-9/10155063_1485929725016579_7557468199677155885_n.jpg?oh=d575aa48176de7ecda27201b7ce35a5b&oe=54F7F368&__gda__=1425195231_44abd00cc231109df2fbe8d44cef9869 Homework Equations ∫E⋅da⋅n = 4πkQenc ΔV(voltage) = -∫Edr...

Homework Statement A ball of mass 1 Kg is dropped from a height of 7m and rebounds to a height of 4.5m Calculate: its kinetic energy just before impact the initial rebound velocity of the ball and kinetic energy. Account for loss of kinetic energy on impact...

Homework Statement First part of the question (SOLVED) A football player kicks a football so that the angle of incidence is 50 DEG and the initial magnitude of velocity of the ball is 15 m/s. Find the: a) Balls maximum height = 6.7 m b) Time of flight = 2.3 s c) time when the ball reaches...

I've been trying to figure out this problem for hours my whole group and most of the class is stumped. We understand that we need to relate the equations of F=ma, Fd = (Cd*p*v^2*A)/2, Fnet=Fd-Fg. No data is given. The answer is a V=____ equation. Even just an answer to #1 would be very helpful...

Homework Statement A ball is thrown toward a cliff of height h with a speed of 28.0 m/s and an angle of 60.0° above horizontal. What is the ball's impact speed Homework Equations Vf=Vi-at Sf=Si+Vit-1/2gt^2 Vy=sintheta Vx=costheta The Attempt at a Solution first find the vertical velocity =...

A couple friends and I were brainstorming an idea today and thought of a way to make a pump using the waves in the ocean for enrgy. So what it comes down to is say a 6cm i diameter steel ball in a tube, each side of the tube could have "pillows" that are part of a "membrane-pump". When the...

Homework Statement Title might be unclear since I had little space to explain. I'll state my problem from the beginning: I don't know how to determine one of the constants in formula for the velocity (the maximum velocity on the y-axis to be precise). I need that constant because I want to...

Homework Statement A ball is thrown upward at an angle of 30° to the horizontal and lands on the top edge of a building that is 20 m away. The top edge is 5.0 m above the throwing point. How fast was the ball thrown? Homework Equations xcos30 ysin30 The Attempt at a Solution Im not sure what...

Hi, I'm working on a project, the project is to create a ball launcher. the ball being a squash ball. 3 balls must be loaded once only but be able to be fired individually. the energy used to fire these balls is 3 1m long bungee chords. this cannot be changed. there are 3 main parts to it.1...

Homework Statement A satellite has a circular orbit 500 km above earth. A ball is thrown directly downwards radially at 20 m/s. Find the path of the ball relative to the satellite. Homework Equations mv^2/r=GMm/r^2 The Attempt at a Solution From the height of the orbit you can easily solve...

Homework Statement A ball is dropped from a height of 5meters a) what is the velocity of the ball when it reaches the ground ? explain Homework Equations velocity = displacement /timeThe Attempt at a Solution the velocity is increasing due the gravitation of Earth (as 9.8m/s) the ball is at a...

Hello, all! I was searching online for help w/ my Physics homework and I stumbled upon this website. New member here (: 1. Homework Statement A baseball is thrown directly upwards. a. Is there a point on the trajectory where the ball has zero velocity? Explain. b. Is there a point on the...

Homework Statement If a 2.5 kg rubber ball is rolled across the dry concrete floor with an acceleration of 4.0 m/s^2[E]. Determine the friction force required to stop the ball. (Drawing a free body diagram will help illustrate this situation) Homework Equations Fk= µk(Fn) F=maThe Attempt at a...

Homework Statement Homework Equations p=mv[/B]The Attempt at a Solution My thoughts- Answer is C as KE is not conserved since velocity of ball has decreased. Option A also seems correct.[/B]

Thanks in advance... I am trying to conceptually get my arms around backspin placed upon a golf ball when an angled(lofted) putter strikes a ball. -I'm assuming as you can see in the attachment that the two objects meet with the horizontal center of gravity at the same location so any twisting...

Homework Statement A 0.62-kg basketball dropped on a hardwood floor rises back up to 64% of its original height. If the basketball is dropped from a height of 1.6m , how much energy is dissipated in the first bounce? How much energy is dissipated in the fourth bounce? Homework Equations U(x) =...

Homework Statement You have a 10kg ball that is going 10m/s. It is about to collide with a much less massive ball that is stationary. What is the range of final velocities of the small mass? All Collisions Are Elastic Given Case 1: The large mass stops after the collision. Given Case 2: The...

Homework Statement Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them A) increases. [<-- Correct Answer] B) remains constant. C) decreases. D) cannot be determined from the information given...

(Look at attached pic) The red ball is attached to a string which is being spun in a vertical circle. The downwards force is gravity and the other green one is the tension force. The blue is the sum of the green vectors. It is the centripetal force because it's the net force (and thus is equal...

Homework Statement Describe what happens to its velocity as it moves up toward its peak. What is its velocity at its peak? Describe what happens to its velocity after it reaches its peak. Homework Equations The Attempt at a Solution No idea how to solve this.

This is from a practice exam without an answer key. I tried the problem once before and am getting a different solution now. My method is solving for the time t when the x position is the width of ramp, and then evaluating y(t) to see if it is more or less than the height of the ramp. The...

Homework Statement A ball starts from rest and rolls down a hill with uniform acceleration, traveling 130m during the second 6.0s of its motion. How far did it roll during the first 6.0s of motion?Homework Equations I guess: v=v(0)+at v^2=v(0)^2+2ay x=x(0)+v(0)t+0.5at^2The Attempt at a...

Homework Statement a spherical ball of mass = 5kg rests between two planes which make angles of 30 degrees and 45 degrees respectively with the horizontal . The system is in equilibrium . find the normal forces exerted on the ball by each of the planes . The planes are smooth . Homework...

A ball is thrown with an initial speed of v0=39.2m/s vertically to Mars. Its initial height is h=15m from the surface of mars. the acceleration of gravity on Mars is g=3.7m/s^2 (1) what is the maximum height hmax of the ball (2) How long is the ball in the 'atmosphere' (3) What is the speed...

Homework Statement Hi all, in my grade 11 book there is a question, and the question is :- there is a ball rolling on a chair by a speed of 5.0 m/s on the X axis, the ball hit the ground on a distance of 0.25 m on the X axis, What is the Δy and what is the speed on Y axis ϑx (speed on X axis)...

Is it possible to create a ball with a positive magnetic core and a negative exterior? And vice versa?

1. Okay. So, my lab is to bounce a ball at a given high while i calculate the time, mass, and different heights. Given these I find the PE, Velocity, and Difference in PE. I've gotten most of the lab complete but there is a final question that asks "If you wanted the golf ball to rebound to a...

If a metallic ball is place under a giant hollow top, and the top starts to rotate. Along with the top, the metallic ball will also start to rotate. Thus my question is the ball motion is under inertial frame of reference or non-inertial ?

A golfer hits a shot to a green that is elevated 3.00 m above the point where the ball is struck. The ball leaves the club at a speed of 17.1 m/s at an angle of 52.0˚ above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air resistance, find the speed of...

Homework Statement Find the force to stop a 5kg ball at 20m/s instantly. Dont take in account resistance. Homework Equations kinetic energy = 0.5*mass*velocity^2 Energy = force * distance force = energy / distance The Attempt at a Solution 0.5 * 5kg * 20m/s^2 = 1000J 1000J / 0 =...

Homework Statement A tunnel is drilled from the surface of the earth(mass assumed to be M and radius to be R) to its center . A body of mass m is dropped from the surface to the center through the tunnel. What will be the velocity with which the body of mass m will hit the tunnel...

I need a contraption that can keep a ball spinning, smoothly, at a slow speed. If it has a variable speed control, that would be better, but minimally it would need to spin a soccer ball and take around 30 seconds to make a full rotation. The look of the device doesn't matter, just that it...

If you are standing on the Earth and you drop a ball, the ball falls to the ground due to the force of gravity acting on it. Now imagine you are in an upward accelerating elevator in space. You let go of a ball that you are holding in your hand. The ball Is stationary in space, but the...

if a ball of mass m were to strike an fixed incined plane of 45degress with velocity of 3m/s, and was rebounded horizontally, what would be the velocity of the rebounded ball.(elastic collision). this the method i have tried. momentum of the system along the x-axis is conserved.therefore...

A hollow sphere with mass $$M$$ , radius $$R$$ , and moment of inertia $$I=2/3MR^2$$ about its center rolls without slipping with a initial center of mass speed $$v$$ towards a fixed ramp. It then rolls without slipping up the ramp. The ramp forms an angle $$\theta$$ with the horizontal...

Homework Statement If a person drops a 20kg ball from a height of 50m. What is the speed of the ball before it hits the ground? Neglecting air resistance.The Attempt at a Solution I'm not sure if this is a trick question. The formula I would use to solve this is final velocity = initial...