1181 Words5 Pages

Roller coasters
Part 1: Research and collecting secondary data
What are the main energy transfers that happen as a “car” travels along the track from the start of the ride to the end?
The main energy transfers are between gravitational potential energy (GPE) and kinetic energy (KE) [1][2][3][4][5], and the eventual decrease of mechanical energy as it transforms into thermal energy. Roller coasters often start as a chain and motor exercises a force on the car to lift it up to the top of a very tall hill [4]. At this height, GPE is at its highest [1][2][3][4][5], as we can see through the formula:
GPE = mass x gravitational field strength x height [3][4] (for all physics in relation to Earth, take g to be 10 m/s2 or 10 N/kg)
We can see through this formula that as the height increases, so does the GPE, which will then be converted into KE, or kinetic energy. This is the energy that takes place as the “car” is falling down the hill. This is calculated through the formula:
KE = 0.5 x mass x speed2 [3][4]
This means that the kinetic energy increases as the speed increases, and vice versa. Therefore, this means the higher the kinetic energy, the faster the “car”. We can actually be extremely specific in terms of this relationship. We know that as the mass doubles, the KE doubles, but as the speed doubles, the KE quadruples [2]. This becomes important when analysing this formula:
KE = GPE/0.5mv2 = mgh [3]
This shows the mathematical relationship between KE and GPE. This formula is in effect as the “car” is falling or rising a hill. The formula shows, that the KE gained, is equal to the GPE lost, and vice versa. To analyse this further, we can observe Newton’s first law of motion. Newton’s law describes how an object in motion, remains in motion. This is why the roller coaster continues going up the slope [1]. However, the KE is lost, as gravity takes effect and

Related

## Gcse Physics Roller Coasters

253 Words | 2 PagesGravity and Potential Energy Gravity is the driving force of a roller coaster. From the moment the roller coaster train passes the peak of the lift hill, it is the acceleration due to gravity that brings it back to the beginning. When the train is released from the top of the lift hill, gravity pulls it down. The train begins slowly, then picks up speed as it approaches the bottom of the hill. As it begins to climb the next hill, the speed decreases.

## Uniform Acceleration Essay

1885 Words | 8 PagesAlso this lab teaches about measurement uncertainty can be calculated using the percent error equation. These are the purposes of the lab. My hypothesis of this experiment is that the velocity of an object, the ball rolling down a ramp or falling down, changes at a constant rate, thus uniform acceleration occurs. Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity over time. An object accelerates if its velocity is constantly changing, also known as speeding up or slowing down.

## Newton; S 2nd Law

1501 Words | 7 PagesNewton’s second law of motion is expressed as a mathematical equation: Fnet = ma (Force = mass*acceleration) A significant notion of this equation is that an object accelerates in the direction of the new force, and acceleration is created by the net force. The SI unit for force in the above equation is Newton (N), SI unit for accelerations is metre per second squared (m/s2) and the SI unit for mass is kilograms (kg). The objective of this experiment was to show the relationship between acceleration and force in a frictionless environment and to show the concept of mass (Lab#1). Other equations used in this experiment were: V22 = V12 + 2ad; used to find the acceleration for each weight V1 = Lt1 and V2 = Lt1; both used to find the acceleration Materials * Two vernier photogate timers * String * Glider * Blower * Air—cushioned track * Weights and Hanger * Pulley and clamps * Vernier Lab Pro Procedure and Observations 1. Two photogate timers, 60 cm apart, were set over the air track.

## Pendulum Lab Essay

579 Words | 3 PagesThe motion is continued until friction comes in contact and slows it down. Some of the physical independent variables of the simple pendulum are the length from the point it pivots, the angular displacement, two different masses of the bob, which is the time it takes the pendulum to complete the vibration. Formulas F = -mgsinθ, This formula explains the Force being up on the oscillating pendulum. The mass times the gravitational pull times the angle at which the pendulum starts at rest. It can be expressed as F= -mgθ because sinθ and θ are very close together in terms of radians.

## Newton's Second Law

1021 Words | 5 PagesNewton’s Second Law and the Work-Kinetic Energy Theorem October 13, 2010 Abstract This experiment utilizes an air track first as an inclined plane with the slider accelerating due to gravity and second as a level surface with the slider accelerating due to the pull of an attached free-falling object of known mass. In both cases, the Work performed is calculated based on formulas for mechanical work and for kinetic energy. The two results are compared. The first part yielded an average acceleration of 0.715 m/s2 (a 1.58% error) and the average result for the Work performed was 0.0204 N*m with only a 0.9% difference. The second part suffered critical errors due to improper data and the results are not significant or useful.

## History of the Piano and Physics

336 Words | 2 PagesThe wavelength and the speed of the wave determine the pitch and frequency of the sound. The amplitude of the wave determines how loud the sound will be. The speed of the wave on a string depends on the tension and mass per unit length. The tighter the string the faster the wave moves along it. The faster the wave speed, the higher its frequency, and the higher the pitch of sound of the note played.

## Analysis Isaac Newton Is Said to Be One of the Greatest Physicists Who Has Ever Lived. It Was from Him That Came Some of the Most Significant and Important Theories, Concepts, and Laws in Physics, One of Which Is the

1957 Words | 8 Pagesm_2 a=m_2 g-T T=m_2 g-m_2 a Equating the tensions m_1 a=m_2 g-m_2 a m_1 a+m_2 a=m_2 g (m_1+m_2 )a=m_2 g a=(m_2 g)/(m_1+m_2 ) The acceleration is the same acceleration described in the kinematics equation a=2s/t^2 For a body starting from rest, s is the distance traveled by the cart and t is the time of travel. We had objectives to meet by the end of the experiment. First of which was to verify the direct proportionality of acceleration and net force if the mass of the body is constant. Meaning, if the acceleration value increases, the net force of the mass must increase as well, given the fact that the mass of the body is constant. The second is to verify the inverse

## Jet Engine Essay

494 Words | 2 PagesJet engines move the airplane forward with a great force that is produced by a thrust and causes the plane to fly very fast. A jet engine operates on the application of Sir Isaac Newton's third law of physics which states that for every action there is an equal and opposite reaction and propulsion. Propulsion means to push forward or drive an object forward. A propulsion system is a machine that produces thrust to push an object forward. Thrust generated depends on the mass flow through the engine and the exit velocity of the gas This law is demonstrated in simple terms by releasing an inflated balloon and watching the escaping air propel the balloon in the opposite direction.

## Acceleration Due To Gravity Physics Lab Report

746 Words | 3 PagesPhysics 215 September 13, 2011 Experiment Number 3 Acceleration Due to Gravity Introduction The purpose of this experiment is to measure the acceleration due to gravity of a free falling object. By performing Galileo’s experiment of free falling objects to measure the acceleration due to gravity. This experiment is based on the Galilean theory of free fall, and there are two important characteristics regarding free fall: (1) Free fall objects do not have air resistance and (2) All free falling objects on Earth experience a downward acceleration of 9.8 m/s2. This experiment will prove that the weight of an object does not determine how fast it will fall, despite Aristotle’s claim. Theory In this experiment we will be interested in only one direction of motion.

## Newton's Second Law

499 Words | 2 PagesNewton’s Second Law Lab Purpose: The purpose of this experiment was to determine the relationships between mass, force and acceleration as well as to prove Newton’s second law Hypothesis: It was hypothesized that there would be an inverse relationship between acceleration and mass; as the value of the mass increased the acceleration decreased. As well it is hypothesized that there would be a direct relationship between the net force and acceleration; as the net force increases the acceleration increases as well. Materials & Method: The materials that were required to do the experiment were a metre stick; its purpose was to measure the amount of string that is going to be used to drag the cart. Next equipment needed for the lab was a dynamic cart; it was going to be dragged by the string with a mass on the other end and will find relationships between these two. Also string (about 75cm) was needed in this experiment which would help pull the cart with the help of the masses that were used.

### Gcse Physics Roller Coasters

253 Words | 2 Pages### Uniform Acceleration Essay

1885 Words | 8 Pages### Newton; S 2nd Law

1501 Words | 7 Pages### Pendulum Lab Essay

579 Words | 3 Pages### Newton's Second Law

1021 Words | 5 Pages### History of the Piano and Physics

336 Words | 2 Pages### Analysis Isaac Newton Is Said to Be One of the Greatest Physicists Who Has Ever Lived. It Was from Him That Came Some of the Most Significant and Important Theories, Concepts, and Laws in Physics, One of Which Is the

1957 Words | 8 Pages### Jet Engine Essay

494 Words | 2 Pages### Acceleration Due To Gravity Physics Lab Report

746 Words | 3 Pages### Newton's Second Law

499 Words | 2 Pages