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Conservation of Energy

Problem 1: Finding the acceleration of gravity at a higher altitude Problem 2: Conservation of momentum Problem 3: Comparing a rolling hollow cylinder down an incline and a sliding block of mass. Please see the attachment for the full description of the problems.

Problem 1: Finding the acceleration of gravity at a higher altitude Problem 2: Conservation of momentum Problem 3: Comparing a rolling hollow cylinder down an incline and a sliding block of mass. Please see the attachment for the full description of the problems.

work done

An 80 kg jogger starts from rest and runs up the hill into a stiff breeze. At the top of the hill the joggers body has done a work of 1.8 X 10^4 J, air resistance has done work of 4420J, and the joggers speed is 3.5 m/s. (1) Is the work done by the joggers body positive or negative? I this work done by a conservative or non-c

Height of a Bullet, Velocity of a Cart

- A 38g bullet is fired at a stationary bag which is hanging vertically from the ceiling. The speed of the bullet is 180m/s. If the mass of the bag is 5.0kg, what is the maximum height it will reach? - A spring is compress 8.7cm between two carts of 1.0kg and 1.5kg respectively. If the spring constant is 89N/m what is the vel

Potential Energy & Energy Conservation - Springs

An 80kg man jumps from a height of 2.5m onto a platform mounted on springs. The spring compress 0.240 below its initial position and then it rebounds. Platform & spring have negligible mass. a) What is the spring's force constant? b) What is his speed when the spring is compressed 0.120m? c) If he gently steps on the plat

Physics Home Experiment: Conservation of energy and momentum

Home Experiment 1 PURPOSE This experiment was designed to understand and confirm the conservation of energy and the conservation of momentum. Part I - Conservation of Energy Equipment Setup Slotted plastic ruler Steel ball bearing Put the ruler at a shallow incline on a table or a chair. Your setup should look somethi

Conservation of momentum and energy, rotation.

1. The 20-lb cart B is supported on rollers of negligible size. If a 10-lb suitcase A is thrown horizontally on it at 10 ft/s, determine the time t and the distance B moves before A stops relative to B. The coefficient of kinetic friction between A and B is μk =0.4. 2. Determine the magnitude of the angular momentum of

Objectives of a Marketing Campaign

Based on the information given in the following scenario, I need help answering the three questions at the end of the scenario: Clif Bar and Co., which makes Energy-bar, is taking its concern about global warming to the ski slopes in a Save Our Snow Winter Roadtrip. The van, powered by vegetable oil, will visit ski areas and

Bullet Motion and Conservation of Energy

A bullet with a mass of 45 g is fired upward through a hole in a table into a block of wood with a mass of 5.2 kg. The bullet lodges in the block and the two rise to a height of 3.1 m above the table. 1. Calculate the potential energy of the block above the table. 2. Calculate kinetic energy and velocity of the block as it

Calculating horizontal distance

A shotputter throws the shot (mass = 7.3 kg) with an initial speed of 14m/s at a 40* angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.2 m above the ground.

X-Ray Problem

An X-ray photon of wavelength 6 pm (1 pm = 10^-12 m) makes a head-on collision with an electron, so that the scattered photon goes in a direction opposite to that of the incident photon. The electron is initially at rest. (a) How much longer is the wavelength of the scattered photon than that of the incident photon? (b) W

Bouncing Ball: Velocities, distances by Law of conservation of Energy.

Q. Bouncing a ball: Let g be the acceleration of gravity near the Earth's surface. The acceleration of gravity near the surface of the Moon is (approximately) g/6. Using the law of conservation of energy, i.e. the principle of conservation of energy, solve the following. (a) Suppose that a ball is dropped from 9 feet above

Problem on frictionless movement of a particle

A particle, starting from point A in the drawing, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height of 4.00 m above the floor before falling back down. Ignoring friction and air resistance, what is the speed f the particle at point A? See at

Conservation of Momentum and Relativity

An electron moving in the positive x-direction is characterized by GAMMA = 1000 and BETA = 1 - 5 x 10^-7 which for this problem you can take as 1. A photon of energy hν, traveling at 45 degrees with respect to the x axis collides with the electron. The collision results in the creation of an electron-positron pair plus an

Physics questions

28-A 7.0 g bullet is fired into a 1.5 kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 12 cm. Find the initial speed of the bullet? 18- A 730 N man stands in the middle of a frozen pond of radius 5.0 m. He is unable to get to the other side because o

Velocity of an electron

2 stationary point charges +3.00 nC and +2.00 nC are seperated by a distance of 50.0 cm. An electron is released from rest at a point midway between the two charges and moves along the line connecting the two charges. What is the speed of the electron when it is 10.0 cm from the +3.00 nC charge?

If the lower layer of the liquid in the graduated

1. If the lower layer of the liquid in the graduated cylinder is salt water, and the top half water, what conclusions can you make with respect to the density of the egg. Foe example, is the egg denser than salt water? than pure water? Why? 2. A 325gram piece of gold at 425C is dropped into 200ml of water at 22.0C. The specif

A small steel ball is rolled down an inclined plane.

A small steel ball is rolled down an inclined plane from a table. The inclined plane is a slotted ruler. One end of the ruler is 10cm off of the table. The ball leaves the table horizontally and lands 46cm from the table on the floor. The table is 72 cm from the ground. 1. Using projectile motion equations, determine the spee

Spring Compression with Moving Blocks

A block of mass slides along a frictionless table with a speed of 10 m/s. Directly in front of it, and moving in the same direction, is a block of mass moving at 3.0m/s. A massless spring with spring constant is attached to the near side of (the side facing ). When the blocks collide, what is the maximum compression of th

Simple Harmonic Motion Physical Pendulum, simple pendulum

A file is attached for the sample a mass of 0.5 kg is suspened from a spring, which stretches by 8 cm. the support from which the spring is suspended is set into siusoidal motion. with what frequency should the tip be tapped to make the strip oscillate with the maximum amplitude?

Conservation of energy questions: skier and a particle in a bowl

39) A particle of mass m=30 g slides inside a bowl whose cross section has circular arcs at each side and a flat horizontal central portion between points a and b of length 20 cm. The curved side oft he bowl are frictionless, and for the flat bottom the coefficient of kinetic friction Mk-0.21. The particle is released from rest

Mechanics: Force, energy and momentum.

1. A 0.25 kg ball is thrown straight up into the air with an initial speed of 19 m/s. Find the momentum of the ball at the following locations. (a) at its maximum height (b) halfway to its maximum height 2. A 2.75 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off

Force and Distance: Physics Problems

1. A 5.3 g bullet leaves the muzzle of a rifle with a speed of 336 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.92 m long barrel of the rifle? 2. A shopper in a supermarket pushes a loaded cart with a horizontal force of 12 N. The cart has a mass of 29 kg. (a) How far will i

Series and Parallel

1.) A box has three identical bulbs mounted on its top with the wires hidden inside the box. Initially bulb A is the brightest and bulbs B and C are equally bright. If you unscrew A, bulbs B and C go out. If you unscrew B, A gets dimmer and C gets brighter so that A and C are equally bright. If you unscrew C, A gets dimmer a

Momentum and collisions

1) A 10.0 g moving to the right at 20.0 cm/s makes and elastic head on collision with a 15.0 g object moving in the opposite direction at 30.0 cm/s. Find the velocity of each object after collision. 2) a 90 kg fullback moving east with a speed of 5 m/s is tackled by a 95 kg opponent running north at 3.0 m/s. If the collis

Coefficient of Restitution of a superball

The coefficient of restitution, e, for a ball hitting a stationary surface with a velocity v1 and rebounding with a velocity v2 is: e = - v2/v1 The value of e is positive, because v1 and v2 have opposite directions, and can be any number from 0 to 1 for a passive collision with the surface(no explosive type energy release

Electrostatics: Ootential energy and conservation laws

Two particles each have a mass of 5.4 x 10-2 kg. One has a charge of +4.8 x 10-6 C, and the other has a charge of -4.8 x 10-6 C. They are initially held at rest at a distance of 1.1 m apart. Both are then released and accelerate toward each other. How fast is each particle moving when the separation between them is one-half its