Mechanics Forum

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High School Why does Greiner call them theorems?
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Undergrad The collision between water and stone, stone-skipping science
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Undergrad Explaining Pressure & Depth Relationships in Fluids Using Halliday & Resnick
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Graduate Newton's laws of motion in 3+1 dimensions ?
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Undergrad Calculating the amplitude of waves in water
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Undergrad How does pressure act in all directions if gravity is downward only
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4
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Graduate Rocket propulsion explained only through pressure differential
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High School Momentum paradox: Why can't we write it as p=m+v ?
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High School What is wrong with following physics equations? (velocity and acceleration)
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5
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Undergrad What causes unhinged objects to rotate?
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Undergrad Why is there angular acceleration in a non-spinning gyroscope?
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Graduate Adding a constant to potential energy doesn't change action?
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Undergrad Normal modes of vibration from the total energy
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Undergrad Mass loss in Bernoulli's Principle?
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2
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Graduate Thoughts on neural networks "discovering" physical concepts
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Graduate Intuitive Explanation of Mass-on-Spring Oscillator Frequency
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Graduate The unwinding coil (teaching experience sharing)
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Graduate Rotation around a non fixed axis + linear motion of a system
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Graduate Brownian Motion - "no inertia"
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6
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Undergrad Why does a car apply a force to a wall?
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5
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High School Aerodynamics -- Warehouse fans blowing toward each other
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3
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Graduate Heisenberg and Varying the Velocity
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High School Understanding F=ma: Constant Speed & Acceleration
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Graduate Particles on Deforming Surfaces: Theory & Analysis
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High School Understanding Torque: Applying the Right Hand Rule in Real Life
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25
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Graduate 1 pulley with mass, 1 mass on the cord, 1 external force, no gravity
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16
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Undergrad Centrifugal forces don't exist in reality?
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High School Mark Watney missed Ares III and died
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10
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Undergrad Conservation of momentum and energy problem
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5
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Graduate Finding Percent of Water & Oil in a Mixture from Surface Tension
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6
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Graduate Direction of an infinitesimal rotation?
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High School Why is the velocity (vector) the same value as the speed (scalar)?
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23
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Undergrad How could Euler have gone about creating his buckling formula?
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4
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Undergrad How Does Refraction Affect Perceived Fish Size Underwater?
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Undergrad Transmitting Torque: Meaning & Why Not Power?
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Graduate Wheel moving in rotation and translation
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15
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Undergrad Work Done Doing Push-ups on an Incline
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23
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Graduate Complex motion equation (projectile with changing mass and thrust)
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Undergrad What is an inertial frame? A conflict of two definitions
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High School Newton's 2nd Law: Force, Mass and Acceleration
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Undergrad Surface tension and Young's contact angle
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High School Helix in intrinsic coordinates?
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Graduate Reaction torque in a traction system
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Undergrad Does inertia have anything to do with bodies falling at the same rate?
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Undergrad Size Effect on Structural Strength
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Undergrad Understanding Pressure Changes: Air and Water in Containers
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Graduate Lennard Jones Potential and the Average Distance Between Two Particles
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Graduate Energy of translation compared to the energy of rotation
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Graduate Can Sci-Fi Spacecraft Achieve Stable Orbit with Plasma Technology?
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Graduate Is gravity an inertial force or interaction force?
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Undergrad Is the Coriolis Effect an Illusion in a Tossed Ball's Motion?
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Undergrad Gravitational potential energy formulas
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High School Testing the effect of Gravity at home....
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Undergrad Conservation of angular momentum and its counterpart for linear momentum
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Undergrad Addition of moments of inertia
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Graduate Rotating frames - Apparent gravity
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Undergrad Difference between centrifugal force vs reactive centrifugal force?
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Graduate Covariance of Newton's 2nd Law under Galilean boosts
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Undergrad What is the orientation of the vector of friction?
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Graduate Calculation of the forces and the work of these forces
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High School A questionable statement in some FBD notes?
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Undergrad Will "centrifugal propulsion" works?
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Graduate How much liquid water do I need to get a relative humidity of 10%?
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Undergrad Frcf= reactive centrifugal force...Frcf= -mv2/R
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Undergrad Why the change in potential energy is the same in all cases?
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Undergrad Understanding energy conservation in a solenoid
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Undergrad Is Newton's Law of Gravity Still Accurate Despite Einstein's Discoveries?
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Graduate Pressure Differential in Fluid Dynamics: Why More on the '+s' Side?
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Graduate Motional EMF in the frame of a moving wire
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The Butterfly Effect: Small Changes Lead to Big Results
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Undergrad What units are used in spin factor and coefficient of lift formulas?
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High School Does Buoyancy Apply When Not Fully Submerged?
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Undergrad Why can shock waves condense water vapor?
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6
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Undergrad How to Estimate Tensile Force on a Pre-Tensioned Rope?
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High School Why is the kinetic energy equation multiplied by ½?
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Graduate Work done on a moving square wire loop in a B-field
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Undergrad Moment of inertia where mass and torque are at a different positions
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Undergrad Finding Fourier Transforms of Non-Rectangular Pulses
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Undergrad Why gravitational potential energy is a system property?
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Undergrad Why is 2.5 times the radius the minimum height needed to do a loop?
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High School What happens if you put a sphere (ball) on the top of a pyramid?
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Undergrad Gravity, Air Friction, Drag, 50, 60, 70, 100 miles up?
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6
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Graduate How does Sherwood's rotational work equation differ?
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Undergrad Stopping Scooters: Comparing KE & AM
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Undergrad How can I accurately locate the front axis of an arrow for optimal flight?
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10
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Graduate What is the geometrical connection between escape velocity and orbital velocity?
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Undergrad Time averages for a 2-dimensional harmonic oscillator
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Graduate Water in a tank being driven up and down
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Graduate Does the Relation ##T_2 = T_1 e^{\mu \theta}## Hold for an Accelerating Capstan?
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Graduate A general potential energy for a multi-particle system
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Graduate How does a pressure distribution keep the fluid from moving?
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Undergrad Vapour pressure of water vapour in air
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Undergrad Equation for trapzoidal motion in motors
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4
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Undergrad Total energy of an isolated system
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3
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Undergrad Power required to reach X velocity in X time with drag
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10
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Undergrad Escape Velocity depends on the Radius of the Earth?
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13
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High School Sound intensity - How to deal with decibels?
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Undergrad Conservative force pairs
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High School Push from a Narrow Base vs Wide Base
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Graduate How are the equations of continuity derived in 1D?
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