Q1 : A mass ( m1 ) of 1.20 kg is situated at the bottom of an incline that is 30o to the horizontal. At the top of the incline, there’s a 0.500 kg disk that is kept fixed by a frictionless axle. A cord is placed over the disk and used to lift aContinue reading “AP PHYSICS: Final Speed of a Block / Incline System”
Tag Archives: kinetic energy
AP PHYSICS: Pulleys, Torque, Tension, and the Moment of Inertia
Two spherical bearings of mass ( m1 ) and ( m2 ) are attached by belt to a pulley that is situated between them. An electric motor is also attached to the pulley, and it is positioned between these masses. When the motor is turned on, the pulley provides 15.0 N of tension on theContinue reading “AP PHYSICS: Pulleys, Torque, Tension, and the Moment of Inertia”
ENERGY AND MOMENTUM: Conservation of Energy, Linear Momentum, and Angular Momentum During a Collision
1. Momentum is always conserved when collisions occur. Momentum is defined as being a quantity of motion, and it is a product of mass and velocity. A small object travelling with a high velocity has great momentum ( Ex. A bullet ), and a massive object travelling with a low velocity has great momentum (Continue reading “ENERGY AND MOMENTUM: Conservation of Energy, Linear Momentum, and Angular Momentum During a Collision”
ENERGY AND MOMENTUM: The Potential Energy of a Pendulum
Q: A pendulum of unknown mass ( m ) is rotated through an angle ( θ ) until it is vertically displaced by a distance ( Δh ). As a consequence, it has a gain in potential energy ( PE ) within the gravitational field that is directly proportional to its vertical displacement. If theContinue reading “ENERGY AND MOMENTUM: The Potential Energy of a Pendulum”
AP PHYSICS: Force and Deceleration
Q: A vehicle weighing ( Fw ) 17.08 kN moves at a constant velocity ( v ) of 35.8 m/s. At some point, the driver decides to let the vehicle coast in neutral, during which air drag causes it to decelerate to 22.4 m/s in 24 s. ( a ) What is the magnitude ofContinue reading “AP PHYSICS: Force and Deceleration”
FLUIDS: Potential Energy, Kinetic Energy, Momentum, and Torricelli’s Theorem
Q: A 0.2 m container is full of a fluid of unknown density ( ρ ). A spigot at the bottom of the container is opened to allow fluid to flow at an unknown velocity ( v ) onto the ground. With what velocity will the fluid flow through the spigot? A: In a separateContinue reading “FLUIDS: Potential Energy, Kinetic Energy, Momentum, and Torricelli’s Theorem”
FLUIDS: Torricelli’s Theorem and the Conservation of Energy
The Law of Conservation of Energy states that energy can neither be created nor destroyed, but it does have the ability to change forms. Take for example an object of mass ( m ) that has been raised to some arbitrary height ( h ). The work ( W ) done on the object isContinue reading “FLUIDS: Torricelli’s Theorem and the Conservation of Energy”
INTRODUCTION TO ELECTRONICS: Energy and Power ( Part 2 )
Newton’s First Law of Motion states that a body that sits still or moves with a constant velocity with respect to a motionless observer will have its status unaltered until acted upon by an unbalanced force. Such a change in motion is accompanied by an acceleration, which is a change of velocity of an object:Continue reading “INTRODUCTION TO ELECTRONICS: Energy and Power ( Part 2 )”
ENERGY AND MOMENTUM: The Joule
The International System of Units ( SI ) uses seven base units to describe seven fundamental quantities that can be measured by scientists: Symbol Name Base quantity second ( s ) time meter ( m ) length kilogram ( kg ) mass ampere ( A ) electric current kelvin (Continue reading “ENERGY AND MOMENTUM: The Joule”
ENERGY AND MOMENTUM: Elastic Collision Determination ( Part 2 )
Q: An elastic collision occurs between two objects of mass ( m1 ) and ( m2 ). Prior to the collision, mass ( m2 ) is stationary and approached by ( m1 ) with a velocity ( v1 ). If only the values of ( m1 ), ( m2 ), and ( v1 ) areContinue reading “ENERGY AND MOMENTUM: Elastic Collision Determination ( Part 2 )”
RENAISSANCE PHYSICS 