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Undergrad Why is Kinetic Energy not = mv?

Apr 15, 2013 · Replies 12 · Apr 17, 2013

Replies: 12

Views: 4K

Undergrad Advantage of using a bigger pulley in belt drive?

Apr 17, 2013 · Replies 3 · Apr 17, 2013

Replies: 3

Views: 3K

Undergrad How to calculate a centrifugal pump for a jet boat.

Apr 14, 2013 · Replies 4 · Apr 17, 2013

Replies: 4

Views: 4K

Undergrad I need a challenging physics project to work on

Oct 16, 2012 · Replies 21 · Apr 17, 2013

Replies: 21

Views: 10K

Undergrad Gimbal table; tilt calculation given acceleration

Apr 16, 2013 · Replies 1 · Apr 17, 2013

Replies: 1

Views: 3K

Undergrad Why Does a Balloon Only Expand at a Certain Air Pressure?

Apr 16, 2013 · Replies 3 · Apr 17, 2013

Replies: 3

Views: 2K

Undergrad Periodic Motion and Simple Harmonic Motion Terminology Question

Apr 16, 2013 · Replies 7 · Apr 16, 2013

Replies: 7

Views: 4K

Undergrad Forces Around a Cone-Shaped Object

Apr 6, 2013 · Replies 8 · Apr 16, 2013

Replies: 8

Views: 3K

Undergrad What is the axis of rotation for a freely moving rigid body after a collision?

Apr 16, 2013 · Replies 2 · Apr 16, 2013

Replies: 2

Views: 2K

Undergrad Effort Required to Overcome Inertia

Apr 16, 2013 · Replies 2 · Apr 16, 2013

Replies: 2

Views: 17K

High School How there is no work done on a book while i am holding it and moving ?

Apr 15, 2013 · Replies 14 · Apr 16, 2013

Replies: 14

Views: 22K

Undergrad The different between the work (PV ) in ΔU and the work (PV ) ΔH

Apr 13, 2013 · Replies 6 · Apr 16, 2013

Replies: 6

Views: 3K

Undergrad Force in a multiple spring system

Apr 15, 2013 · Replies 1 · Apr 16, 2013

Replies: 1

Views: 3K

Undergrad Does the gravity we feel equal G(M/r^2) - our centripetal acceleration

Apr 15, 2013 · Replies 1 · Apr 15, 2013

Replies: 1

Views: 2K

Undergrad Why is fluid velocity unaffected by a change of pipe roughness here?

Apr 15, 2013 · Replies 3 · Apr 15, 2013

Replies: 3

Views: 2K

Undergrad Partial Pressure: Higher SP Determines P

Apr 14, 2013 · Replies 5 · Apr 15, 2013

Replies: 5

Views: 2K

Graduate Dynamic Soaring: Explaining the Errors of an Innovative Theory

Apr 12, 2013 · Replies 7 · Apr 15, 2013

Replies: 7

Views: 2K

High School Conservative Force: Properties & Definition

Apr 15, 2013 · Replies 1 · Apr 15, 2013

Replies: 1

Views: 1K

High School Determine the weight of a titanium sphere

Apr 14, 2013 · Replies 4 · Apr 15, 2013

Replies: 4

Views: 3K

Undergrad Newton vs Einstein: Mass & Special Relativity

Apr 9, 2013 · Replies 25 · Apr 14, 2013

Replies: 25

Views: 5K

Undergrad Angular momentum - length of day change if drive on other side of road

Apr 13, 2013 · Replies 6 · Apr 14, 2013

Replies: 6

Views: 4K

Undergrad Explosion+Impulse: Calculating Pressure

Apr 14, 2013 · Replies 1 · Apr 14, 2013

Replies: 1

Views: 2K

High School How much propulsion would i need to move my 300 pound hovercraft?

Apr 14, 2013 · Replies 4 · Apr 14, 2013

Replies: 4

Views: 2K

Undergrad Conservation of momentum close to the Earth vs. far from the Earth

Apr 14, 2013 · Replies 7 · Apr 14, 2013

Replies: 7

Views: 2K

High School Photons, speed and energy - Beginners concept question

Apr 14, 2013 · Replies 4 · Apr 14, 2013

Replies: 4

Views: 5K

High School Conservation of Momentum when an Object Rebounds

Apr 14, 2013 · Replies 1 · Apr 14, 2013

Replies: 1

Views: 4K

Undergrad Kinetic energy change during phase change

Apr 14, 2013 · Replies 7 · Apr 14, 2013

Replies: 7

Views: 4K

High School How can balloons be used to lift a house?

Apr 14, 2013 · Replies 1 · Apr 14, 2013

Replies: 1

Views: 2K

Graduate Resonance in a damped triangular potential well

Apr 13, 2013 · Replies 2 · Apr 13, 2013

Replies: 2

Views: 2K

Undergrad Outgassing of CO2 from a lake after lowering the water level

Apr 12, 2013 · Replies 10 · Apr 13, 2013

Replies: 10

Views: 2K

Graduate What significance does brownian motion has to do with coal explosion?

Apr 12, 2013 · Replies 3 · Apr 13, 2013

Replies: 3

Views: 2K

High School Kinetic energy question. (layman)

Apr 11, 2013 · Replies 15 · Apr 13, 2013

Replies: 15

Views: 3K

Undergrad Finding the Minimum Velocity for UFO Intercepting Missile (question)

Apr 11, 2013 · Replies 9 · Apr 12, 2013

Replies: 9

Views: 2K

High School Please verify this notion regardingmomentum

Apr 12, 2013 · Replies 4 · Apr 12, 2013

Replies: 4

Views: 1K

Graduate Rolling without slipping and velocity

Apr 12, 2013 · Replies 5 · Apr 12, 2013

Replies: 5

Views: 7K

High School Water Balloon to the face physics

Apr 10, 2013 · Replies 3 · Apr 11, 2013

Replies: 3

Views: 5K

Graduate Distribution (Dirac&standard) formulations of f=ma how do they go again?

Jan 31, 2013 · Replies 52 · Apr 11, 2013

2

Replies: 52

Views: 7K

Undergrad Resolving Power - Disadvantages

Apr 10, 2013 · Replies 8 · Apr 11, 2013

Replies: 8

Views: 3K

Undergrad Why Does My Cell Phone Work Inside a Metallic Elevator?

Apr 11, 2013 · Replies 6 · Apr 11, 2013

Replies: 6

Views: 12K

Undergrad Why doesn't energy have direction?

Mar 7, 2012 · Replies 27 · Apr 11, 2013

Replies: 27

Views: 15K

Graduate Rollecoaster Banked Curve Physics

Apr 10, 2013 · Replies 1 · Apr 11, 2013

Replies: 1

Views: 3K

High School Gear ratio - Does it matter how you achieve it?

Oct 29, 2012 · Replies 14 · Apr 10, 2013

Replies: 14

Views: 7K

Undergrad TV Screen & Bracket Moment Question

Apr 10, 2013 · Replies 1 · Apr 10, 2013

Replies: 1

Views: 2K

Undergrad The concept of rotational equilibrium

Apr 10, 2013 · Replies 9 · Apr 10, 2013

Replies: 9

Views: 3K

Undergrad Understanding Newtonian Gravitation

Apr 9, 2013 · Replies 3 · Apr 10, 2013

Replies: 3

Views: 2K

High School Simple Harmonic Motion (F=-kx) - Help

Apr 9, 2013 · Replies 4 · Apr 10, 2013

Replies: 4

Views: 4K

High School Is there an indent when standing on a solid surface?

Apr 8, 2013 · Replies 5 · Apr 10, 2013

Replies: 5

Views: 2K

Graduate Principal Virtual Work Theories - Cylindrical Pipe Application

Apr 9, 2013 · Replies 1 · Apr 9, 2013

Replies: 1

Views: 1K

Undergrad Load cell (how to convert V to N)

Apr 9, 2013 · Replies 1 · Apr 9, 2013

Replies: 1

Views: 6K

Graduate Solution of wave equation, 2nd partial derivatives of time/position

Apr 1, 2013 · Replies 1 · Apr 9, 2013

Replies: 1

Views: 2K

Graduate Integrating gravitational acceleration of particles for simulation

Apr 9, 2013 · Replies 1 · Apr 9, 2013

Replies: 1

Views: 2K

High School Terminology(or physics) problem (speed and velocity)

Apr 9, 2013 · Replies 1 · Apr 9, 2013

Replies: 1

Views: 1K

Graduate Questions on classical mechanics

Apr 8, 2013 · Replies 3 · Apr 9, 2013

Replies: 3

Views: 3K

Undergrad How Does Normal Force Change as a Car Accelerates on a Banked Curve?

Apr 8, 2013 · Replies 1 · Apr 9, 2013

Replies: 1

Views: 2K

Graduate What is the rigorous proof for elastic collisions?

Apr 8, 2013 · Replies 5 · Apr 8, 2013

Replies: 5

Views: 5K

Graduate Harmonic Oscillator with Additional Repulsive Cubic Force: Solutions and Study

Apr 5, 2013 · Replies 2 · Apr 8, 2013

Replies: 2

Views: 2K

Graduate How to handle negative momentum

Apr 8, 2013 · Replies 2 · Apr 8, 2013

Replies: 2

Views: 2K

Graduate Fractional energy loss per cycle in a heavy damped oscillator

Apr 7, 2013 · Replies 9 · Apr 8, 2013

Replies: 9

Views: 6K

Graduate Is the second derivative of a circle related to an orbiting object?

Apr 7, 2013 · Replies 4 · Apr 8, 2013

Replies: 4

Views: 3K

Undergrad Concept of Work and Conservative Forces

Apr 7, 2013 · Replies 7 · Apr 7, 2013

Replies: 7

Views: 3K

High School What power supply (amps) would run this plasma globe optimally?

Apr 7, 2013 · Replies 13 · Apr 7, 2013

Replies: 13

Views: 13K

Undergrad How does one get the solution to the differential equation for SHM?

Apr 6, 2013 · Replies 5 · Apr 7, 2013

Replies: 5

Views: 2K

Graduate Transfer of energy without doing work

Apr 7, 2013 · Replies 5 · Apr 7, 2013

Replies: 5

Views: 2K

Undergrad The Mysteries of a Plane-Block System: Help Needed!

Apr 7, 2013 · Replies 2 · Apr 7, 2013

Replies: 2

Views: 1K

Undergrad Is my understanding of the hot air balloon equation correct?

Apr 6, 2013 · Replies 3 · Apr 7, 2013

Replies: 3

Views: 4K

Undergrad A pickle in finding vehicle center of gravity.

Apr 5, 2013 · Replies 2 · Apr 7, 2013

Replies: 2

Views: 2K

Graduate Inelastic Collisions - variables and equations

Apr 1, 2013 · Replies 3 · Apr 7, 2013

Replies: 3

Views: 2K

Undergrad How to find the coefficient of drag of a car model?

Apr 6, 2013 · Replies 6 · Apr 6, 2013

Replies: 6

Views: 6K

Graduate Understanding Damped Harmonic Motion

Apr 6, 2013 · Replies 7 · Apr 6, 2013

Replies: 7

Views: 4K

Undergrad How Does Phase Shift Affect the General Solution for S.H.M. in a Helical Spring?

Apr 6, 2013 · Replies 2 · Apr 6, 2013

Replies: 2

Views: 2K

Undergrad Relating Momentum to Kinetic Energy

Apr 5, 2013 · Replies 5 · Apr 6, 2013

Replies: 5

Views: 3K

High School Simple p=mv question needs simple answer

Apr 5, 2013 · Replies 23 · Apr 6, 2013

Replies: 23

Views: 7K

Graduate Brownian Particle bound by a Spring / internal Energy

Mar 25, 2013 · Replies 9 · Apr 6, 2013

Replies: 9

Views: 2K

High School Can Newton's Laws of Motion be simplified?

Mar 31, 2013 · Replies 6 · Apr 6, 2013

Replies: 6

Views: 2K

High School Force on a fixed object- help settle a debate please

Mar 31, 2013 · Replies 17 · Apr 5, 2013

Replies: 17

Views: 3K

High School Angular/Tangential Acceleration

Apr 5, 2013 · Replies 1 · Apr 5, 2013

Replies: 1

Views: 2K

Undergrad Two parallel springs, frequency change?

Apr 4, 2013 · Replies 2 · Apr 5, 2013

Replies: 2

Views: 2K

Graduate Energy formulation of classical mechanics?

Apr 5, 2013 · Replies 1 · Apr 5, 2013

Replies: 1

Views: 2K

Graduate Plank Time & Speed: Is Light C Plank Speed?

Apr 5, 2013 · Replies 3 · Apr 5, 2013

Replies: 3

Views: 2K

High School Does a car's acceleration change after releasing the accelerator?

Apr 2, 2013 · Replies 24 · Apr 4, 2013

Replies: 24

Views: 5K

Undergrad Kinematic viscosity confusion

Aug 25, 2011 · Replies 5 · Apr 4, 2013

Replies: 5

Views: 3K

Graduate Average Potential Energy/ Oscillator

Apr 3, 2013 · Replies 6 · Apr 4, 2013

Replies: 6

Views: 3K

Undergrad How to solve 2nd order diff. equation for simple harmonic motion

Apr 4, 2013 · Replies 3 · Apr 4, 2013

Replies: 3

Views: 2K

Undergrad Why do left turns generate torque?

Apr 3, 2013 · Replies 8 · Apr 4, 2013

Replies: 8

Views: 4K

Graduate Understanding SHM in a Potential Well: F(x+xo) and dU/dx Link Explained

Apr 4, 2013 · Replies 1 · Apr 4, 2013

Replies: 1

Views: 2K

Graduate Problems with calclulating power

Jan 14, 2013 · Replies 22 · Apr 4, 2013

Replies: 22

Views: 8K

Undergrad What Is the Relationship Between Torque and Weight in Vehicle Payload Capacity?

Apr 4, 2013 · Replies 1 · Apr 4, 2013

Replies: 1

Views: 10K

Undergrad Would this work to pump water ?

Apr 3, 2013 · Replies 8 · Apr 4, 2013

Replies: 8

Views: 2K

Graduate How Does Blackbody Radiation Affect Motion in Different Inertial Frames?

Apr 3, 2013 · Replies 2 · Apr 4, 2013

Replies: 2

Views: 2K

Graduate How do I determine the correct vector potential for a given electric field?

Apr 3, 2013 · Replies 3 · Apr 4, 2013

Replies: 3

Views: 2K

Graduate Gravitational Waves due to mass and acceleration

Apr 3, 2013 · Replies 1 · Apr 3, 2013

Replies: 1

Views: 2K

Undergrad How to derive the equations of oscillation

Apr 2, 2013 · Replies 4 · Apr 3, 2013

Replies: 4

Views: 2K

Graduate Partial Derivatives of the Position and Velocity Vectors of a Particle

Apr 3, 2013 · Replies 5 · Apr 3, 2013

Replies: 5

Views: 10K

Graduate Hardest physics question/task. No naysayers please Thanks

Mar 30, 2013 · Replies 11 · Apr 3, 2013

Replies: 11

Views: 3K

Undergrad Can Humans Survive Acceleration from 100 to 7000 mph in Seconds?

Apr 2, 2013 · Replies 3 · Apr 3, 2013

Replies: 3

Views: 4K

Undergrad Which equation to use in a Simple Harmonic Motion

Apr 1, 2013 · Replies 6 · Apr 3, 2013

Replies: 6

Views: 2K

Undergrad Conservation of energy (and rotational kinetic engery)

Apr 2, 2013 · Replies 7 · Apr 3, 2013

Replies: 7

Views: 4K

Graduate What would happen in Planetary Collision?

Apr 2, 2013 · Replies 5 · Apr 2, 2013

Replies: 5

Views: 2K

Undergrad What is the velocity of a flying bird on a windy day?

Apr 2, 2013 · Replies 2 · Apr 2, 2013

Replies: 2

Views: 2K

Undergrad Can mass play a factor in the force of gravity on Earth?

Mar 30, 2013 · Replies 6 · Apr 2, 2013

Replies: 6

Views: 3K

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