# Shared Flashcard Set

## Details

MCAT EK Physics Lecture 3
Flashcards for MCAT EK Physics Lecture 3
12
Physics
Not Applicable
12/01/2011

Term
 Define equilibrium conceptually and mathetmatically
Definition
 A system with no translational or angular acceleration (it is moving and rotating at constant velocity) F upward = F downward F leftward = F rightward
Term
 Explain the difference between static and dynamic equilibrium
Definition
 Static Equilibrium - when all translational and angular velocities are constant and zeroDynamic Equilibrium - when all translational and angular velocities are constant and nonzero
Term
 What are the three useful equations for Torque problems?
Definition
 Torque = Frsinθ   Torque = Fl   Torqueclockwise = Torquecounterclockwise
Term
 Define mechanical energy
Definition
 The kinetic and potential energy of a macroscopic system
Term
 What is the formula for kinetic energy?
Definition
 K = 1/2mv2
Term
 What is the formula for gravitational potential energy?
Definition
 Ug = mgh
Term
 What is the formula for elastic potential energy?
Definition
 Ue = 1/2kΔx2
Term
 What are the three formulas for Work and when do they apply?
Definition
 W = Fdcosθ (for all forces except friction)   W = ΔK + ΔU + ΔE (no heat)   W = ΔK + ΔU (no friction, no heat)
Term
 Explain the difference between conservative and nonconservative forces
Definition
 The work done against conservative forces is conserved in potential energy; the work done against nonconservative forces is not conserved
Term
 Give four examples of conservative forces
Definition
 Gravitational forces, Hooke's law forces, electrical and magnetic field forces
Term
 What is Power?
Definition
 The rate of energy transfer
Term
 What are the three formulas for Power?
Definition
 P = ΔE / t   P = W/t   P = FvcosΘ
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