Mechanics Forum

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High School Why does ice have more friction when it's solid compared to when it's melting?
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Undergrad Non-Newtonian description of an accelerated object
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High School Analysis vs arithmetic approach to solving motion
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9
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Undergrad Conservation of angular momentum -- spinning a bicycle wheel in space
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2
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Classical Mechanics, Motion under Gravity, Motion on Inclines
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Undergrad Acceleration at 1g in space -- Does it create a gravitational field?
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Undergrad Vacuum pump operating at high altitude
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Undergrad Deriving Doppler Effect Frequency w/ Stationary Person & Moving Source
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Undergrad What will the angle of a boat with an outboard motor be?
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Undergrad My textbook is deriving wave speed on a string under tension
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Undergrad Water has no shear force but it can be sheared?
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Undergrad If there is no force being applied can there still be a net force?
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Undergrad How to convert density ratio of grams/ mm^3 into metric tonnes/ m^3
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6
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High School Rolling without slipping in non-sloping surface
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Undergrad Kleppner Classical mechanics: Question about stability (p.217)
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High School Does air resistance have a max value?
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Undergrad Skateboarding Physics: Force of Landing from 10ft Roof
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High School Confusion with orientation of coordinate axis in inclined plane
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High School Conservation of Energy and Momentum in an Explosion
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4
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Undergrad Understanding Net Internal Torque and Kinetic Friction in a System
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9
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Undergrad Collision when a falling tank impacts the surface of a lake
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7
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Undergrad When are the initial and final momentums the same (conserved)?
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Undergrad A Question About Shock Waves From an Airplane
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Undergrad Direction of friction of each wheel and total moment when a car turns
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Undergrad Does dW/dx = Fx and dW/dy = Fy?
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Undergrad Forces to move on the level versus up an inclined plane
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Undergrad If we throw a ball with initial velocity v0, is there a force?
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3
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Help with drag coefficient calculated from ballistic coefficient
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3
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Undergrad Confused about N*sin(theta) = (m*v^2)/r in banked curve
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5
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Undergrad Mass of Backpack in Moving Elevator
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Undergrad Force between Positive and Negative Electrical Charges
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4
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Normal Force: Inclined Plane vs. Banked Turn
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Undergrad How to interpret this definition of potential energy?
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Undergrad Ceiling fan pressure increase or decrease
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High School Understanding Weight and Inertia: A Comparison of Mars and Earth
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Undergrad Why is ∂σ(δxσ) not equal to zero?
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High School Does the Bernouli Effect Work On Cars?
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Undergrad How to calculate the HP/torque required to rotate a dual sprocket/chain system?
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High School About actually touching something and sound made by collision
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High School Can I hold down more than my body weight on a 1 to 1 system?
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Undergrad Why don't we "fly up" in an accelerating elevator?
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High School Does more energy mean more work?
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Undergrad Tension/compression in curved truss? (Diagram attached)
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Undergrad Which direction do the loads and reactions go in a Ferris wheel?
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High School Gravitational acceleration in circular motion
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Undergrad Why is momentum considered a vector and kinetic energy a scalar?
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Undergrad How to transfer angular momentum between two flywheels?
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High School Does weight affect the acceleration of an object?
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Undergrad Understanding tension and centripedal force in a puck and weight
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High School To displace the Earth from its orbit
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High School Is the final velocity of a Tossed tomato the same as its initial velocity
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High School Work energy theorem by variable force
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High School Why does the work done by a weightlifter result in a net energy loss?
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Undergrad Understanding the physics of a bosun's chair and mechanical advantage
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Undergrad A problem with non evident first integral
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High School Misleading Textbook Equation for vf^2=vi^2 + 2ad
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High School Defining Impulse: The Importance of a New Quantity in Physics
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High School What Happens to a Ball's Energy When Thrown Upwards?
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High School Same case of Newton’s third law
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High School Work done in lifting and lowering an object
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High School What is the need for the concepts of Work and Energy (KE)?
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High School About verification on Kinetic energy and work
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Graduate Find Euler-Lagrange Equations w/Given Init Pos & Vel
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High School What is tension and how does it affect a rope?
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Undergrad Problem with Static Friction -- Two blocks on a platform
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High School Newton’s second law as one complete law
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High School Calculate needed dimensions of table - Center of mass, levers etc
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Undergrad Lift Force of a Rotating Sphere in the Air
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Undergrad Understanding the thrust generated by a typical jet engine
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High School Understanding Friction: Causes and Applications in Physics
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Undergrad Rotation of bike riding off cliff
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Can someone explain the vacuum pressure created by water pressure on waders?
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High School What is the concept of distance as an integral in Feynman lectures on physics?
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High School Can the output forces for F3 and F4 be the same as F2 in hydraulic lifting?
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High School Calculating Flywheel Mass and Diameter for Efficient Generator Drive
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High School Atwood machine -- Question about the pulley and weights
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High School Air Gun Sighted at a Falling Target Demonstration
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Undergrad Number of integration constants
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Undergrad Can Any Quantifiable Variable Serve as a Coordinate in Euler-Lagrange Equations?
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Undergrad The time derivative of kinetic energy
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High School Maximum Force on transom of a boat under acceleration
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High School Question about a simple free body diagram
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High School Speed/velocity as a derivative
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High School About Second equation of motion
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Undergrad Kinetic Energy derivation assumption?
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Graduate Deriving Navier-Stokes: Lagrangian & Hamiltonian Methods
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4
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Undergrad The centripetal acceleration of the planets in our solar system
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Graduate Noether's theorem time invariance -- mean value theorem use?
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Undergrad Work Done/Energy Transferred in One Dimensional Collision
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Undergrad Time period of Beat (acoustics)
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Undergrad Dimensional analysis seems wrong for this equation: z = -1/(x^2+y^2)
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Undergrad Proving Torricelli's Law Using Bernoulli's Principle
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Graduate Why is this matrix symmetric here?
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3
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Undergrad What is the acceleration at the contact point between a wheel and surface?
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High School Grain direction for maximum tear resistance for a wire bound book
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Use internal pressure to compute work done by an expanding gas?
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High School Inertial vs non inertial frames
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Analysis of tennis string tension
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High School Confused about force body diagram for 2 body collision
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6
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Undergrad Resolve moment of inertia at an angle
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