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Undergrad Why phase velocity and group velocity is not the same?

Nov 13, 2008 · Replies 10 · Nov 21, 2008

Replies: 10

Views: 11K

Undergrad Question About Mass and Mass Flow Rate Relations

Nov 19, 2008 · Replies 4 · Nov 21, 2008

Replies: 4

Views: 6K

Undergrad Motorcycle vs Bicycle chain tension

Nov 20, 2008 · Replies 1 · Nov 20, 2008

Replies: 1

Views: 4K

Undergrad Flow of fluids through an infinitely thin hole

Nov 4, 2008 · Replies 6 · Nov 20, 2008

Replies: 6

Views: 2K

Undergrad Understanding Car Suspension Forces: Modeling & Calculations

Nov 18, 2008 · Replies 6 · Nov 20, 2008

Replies: 6

Views: 4K

High School Why Does Centripetal Force Keep Objects at a Constant Distance from the Pivot?

Nov 18, 2008 · Replies 5 · Nov 20, 2008

Replies: 5

Views: 3K

Undergrad Maximum velocity on a banking curve formula

Nov 19, 2008 · Replies 3 · Nov 20, 2008

Replies: 3

Views: 10K

Graduate Is a Rigid Body Always Concentrated at its Center of Mass in Circular Motion?

Nov 19, 2008 · Replies 2 · Nov 19, 2008

Replies: 2

Views: 3K

Graduate Thick cylinder under internal pressure

Nov 19, 2008 · Replies 1 · Nov 19, 2008

Replies: 1

Views: 5K

Undergrad Are Legal Fees Justified for Injury Claims with Minimal Effort?

Nov 18, 2008 · Replies 4 · Nov 19, 2008

Replies: 4

Views: 3K

Undergrad Extra forces to consider against a runner

Nov 19, 2008 · Replies 1 · Nov 19, 2008

Replies: 1

Views: 2K

Undergrad Finding velocity from change in potential

Nov 18, 2008 · Replies 3 · Nov 19, 2008

Replies: 3

Views: 3K

Graduate Rocketship problem- fuel burn and gravity

Nov 12, 2008 · Replies 6 · Nov 19, 2008

Replies: 6

Views: 5K

Undergrad Archimedes Principle & Specific Gravity

Nov 19, 2008 · Replies 2 · Nov 19, 2008

Replies: 2

Views: 18K

Undergrad Efficiency of Siphons: Vacuum & Pressure

Feb 18, 2008 · Replies 7 · Nov 18, 2008

Replies: 7

Views: 7K

High School Charging a car battery with dry cells?

Nov 14, 2008 · Replies 9 · Nov 18, 2008

Replies: 9

Views: 11K

Graduate Surface Tension at Critical Temperature: Contact Angle?

Nov 17, 2008 · Replies 2 · Nov 18, 2008

Replies: 2

Views: 2K

Undergrad Moment Of Inertia Of Sphere At A Distance

Nov 17, 2008 · Replies 2 · Nov 17, 2008

Replies: 2

Views: 2K

Undergrad Differential motion of smoke particles?

Nov 17, 2008 · Replies 3 · Nov 17, 2008

Replies: 3

Views: 2K

Undergrad Gravity and Terminal Velocity: Understanding the Relationship

Nov 17, 2008 · Replies 2 · Nov 17, 2008

Replies: 2

Views: 4K

Undergrad Understanding the Selective Protection of High Frequencies by Ear Protectors

Nov 16, 2008 · Replies 7 · Nov 17, 2008

Replies: 7

Views: 2K

Undergrad How does friction affect a car's ability to turn at high speeds?

Nov 16, 2008 · Replies 3 · Nov 17, 2008

Replies: 3

Views: 5K

Undergrad Acceleration Time if Thrust is Variable (polynomial)?

Nov 10, 2008 · Replies 16 · Nov 16, 2008

Replies: 16

Views: 4K

Undergrad Speeding up before a Hill to Save Gas

Nov 15, 2008 · Replies 14 · Nov 16, 2008

Replies: 14

Views: 4K

Undergrad Formula for gravity/circular motion in terms of V? (i think )

Nov 16, 2008 · Replies 5 · Nov 16, 2008

Replies: 5

Views: 5K

Undergrad Fluid with laminar flow going through a constriction in a pipe has low

Nov 15, 2008 · Replies 5 · Nov 16, 2008

Replies: 5

Views: 4K

Undergrad Vortex tubes, how do they work?

Nov 5, 2008 · Replies 19 · Nov 16, 2008

Replies: 19

Views: 8K

Undergrad Elastic collision/ projectile motion

Nov 16, 2008 · Replies 1 · Nov 16, 2008

Replies: 1

Views: 3K

Undergrad Into what kind of energy does the potential energy transforms in this example

Nov 15, 2008 · Replies 3 · Nov 16, 2008

Replies: 3

Views: 2K

Undergrad Solving the Rolling Wheel Problem - Get Maximum Distance

Nov 15, 2008 · Replies 2 · Nov 16, 2008

Replies: 2

Views: 3K

Graduate Surface tension_another problem

Nov 15, 2008 · Replies 1 · Nov 15, 2008

Replies: 1

Views: 2K

Undergrad Is the pressure at points P1 and P2 the same in surface tension controversy?

Nov 15, 2008 · Replies 6 · Nov 15, 2008

Replies: 6

Views: 2K

Graduate Maintaining constant air pressure in leaky container

Nov 15, 2008 · Replies 1 · Nov 15, 2008

Replies: 1

Views: 4K

Graduate Friction Model for a rolling disk

Nov 15, 2008 · Replies 3 · Nov 15, 2008

Replies: 3

Views: 6K

High School What is the significance of 2pie in the power formula?

Nov 14, 2008 · Replies 4 · Nov 15, 2008

Replies: 4

Views: 3K

Undergrad Friction in Pulley System: Calculations?

Nov 12, 2008 · Replies 8 · Nov 15, 2008

Replies: 8

Views: 5K

Graduate A sliding block - what's wrong with my arguement

Aug 16, 2008 · Replies 12 · Nov 15, 2008

Replies: 12

Views: 4K

Undergrad Car Rolling Friction: Answers to Questions

Nov 14, 2008 · Replies 2 · Nov 15, 2008

Replies: 2

Views: 5K

How do you make a quiet (from splashing) waterfall

Nov 14, 2008 · Replies 6 · Nov 14, 2008

Replies: 6

Views: 16K

High School Why do smaller wheels on a car ?

Nov 13, 2008 · Replies 8 · Nov 13, 2008

Replies: 8

Views: 36K

Undergrad Water in straw, then cut straw

Nov 13, 2008 · Replies 1 · Nov 13, 2008

Replies: 1

Views: 4K

Undergrad Calculate Flow Rate from Inclined Plate | Physics Problem Solution"

Nov 11, 2008 · Replies 3 · Nov 13, 2008

Replies: 3

Views: 8K

Graduate Understanding Vorticity and Propagation of Ring Vortex

Sep 4, 2008 · Replies 1 · Nov 13, 2008

Replies: 1

Views: 2K

Undergrad What parameters determine the volume and depth of the cavity?

Nov 12, 2008 · Replies 1 · Nov 12, 2008

Replies: 1

Views: 2K

Undergrad The difference between rear and front brakes of a bicycle

Nov 10, 2008 · Replies 5 · Nov 10, 2008

Replies: 5

Views: 6K

Undergrad Does Stoke's Law Disregard Weight in Fluid Dynamics?

Nov 7, 2008 · Replies 4 · Nov 10, 2008

Replies: 4

Views: 4K

Undergrad How to Make a Granite Ball Float on Water?

Apr 17, 2006 · Replies 13 · Nov 10, 2008

Replies: 13

Views: 31K

High School Can Resistors Receive Power on an Open Circuit?

Nov 9, 2008 · Replies 6 · Nov 9, 2008

Replies: 6

Views: 19K

Graduate Can a Wind-Powered Vehicle Travel Downwind Faster Than the Wind?

Nov 7, 2008 · Replies 73 · Nov 9, 2008

3

Replies: 73

Views: 29K

Graduate Developing an Algorithm for Predicting Robot Position Over Time

Nov 7, 2008 · Replies 2 · Nov 8, 2008

Replies: 2

Views: 3K

Undergrad Tension and Acceleration in Pulley System

Oct 27, 2008 · Replies 28 · Nov 8, 2008

Replies: 28

Views: 28K

Undergrad Echocardiograms - how do they work?

Nov 8, 2008 · Replies 1 · Nov 8, 2008

Replies: 1

Views: 2K

Graduate Calculating Shear Strain in 3 Dimensions

Nov 7, 2008 · Replies 3 · Nov 8, 2008

Replies: 3

Views: 5K

Undergrad Angle at which distance is longest?

Nov 2, 2008 · Replies 2 · Nov 7, 2008

Replies: 2

Views: 3K

Undergrad How Do You Calculate G-Force in a Gravity-Powered Track Simulation?

Nov 4, 2008 · Replies 1 · Nov 7, 2008

Replies: 1

Views: 2K

Undergrad Bank Curve Friction: How Does it Act?

Nov 5, 2008 · Replies 5 · Nov 6, 2008

Replies: 5

Views: 6K

Undergrad Egg Drop with elastic potential energy.

Nov 6, 2008 · Replies 1 · Nov 6, 2008

Replies: 1

Views: 3K

Undergrad Hitting moving target with projectile (w/ gravity) 2D

Oct 7, 2008 · Replies 3 · Nov 6, 2008

Replies: 3

Views: 6K

Undergrad Two Normal Forces: Physics Explanation

Nov 5, 2008 · Replies 1 · Nov 6, 2008

Replies: 1

Views: 8K

Undergrad Potential energy of a 1000 kg weight at 10 meters high

Nov 3, 2008 · Replies 15 · Nov 6, 2008

Replies: 15

Views: 15K

Graduate Is there a deeper explanation for Newton's Third Law?

Nov 5, 2008 · Replies 8 · Nov 6, 2008

Replies: 8

Views: 3K

Graduate Rotational motion about a centre of mass

Nov 5, 2008 · Replies 8 · Nov 5, 2008

Replies: 8

Views: 3K

High School Differences Between Different Direction Notations

Nov 5, 2008 · Replies 2 · Nov 5, 2008

Replies: 2

Views: 2K

High School Question about the output of a car battery in amps

Nov 4, 2008 · Replies 4 · Nov 5, 2008

Replies: 4

Views: 4K

Undergrad Earth's Rotation and Effect on Launch Altitude

Sep 23, 2007 · Replies 10 · Nov 5, 2008

Replies: 10

Views: 10K

Graduate Can a Photon Exist Without Speed?

Nov 4, 2008 · Replies 1 · Nov 4, 2008

Replies: 1

Views: 2K

Undergrad Improve Bicycle Braking System with Momentum Research - Luke Mace

Nov 4, 2008 · Replies 2 · Nov 4, 2008

Replies: 2

Views: 4K

Undergrad Understanding Forces: Bird Wings, Air Displacement, and Conservation of Momentum

Nov 4, 2008 · Replies 5 · Nov 4, 2008

Replies: 5

Views: 2K

High School The forces exerted upon surface areas

Nov 3, 2008 · Replies 2 · Nov 3, 2008

Replies: 2

Views: 3K

Undergrad Forces in Walls? Pressure Uniform?

Nov 3, 2008 · Replies 1 · Nov 3, 2008

Replies: 1

Views: 3K

Graduate Freq change- string under const tension

Nov 3, 2008 · Replies 1 · Nov 3, 2008

Replies: 1

Views: 2K

Undergrad How can I measure lift in a wind tunnel?

Nov 2, 2008 · Replies 3 · Nov 3, 2008

Replies: 3

Views: 7K

Graduate Physics Simulation- Angular Velocity Applications

Oct 30, 2008 · Replies 7 · Nov 3, 2008

Replies: 7

Views: 7K

Undergrad Solve Open Tank Fluid Question: Time to Empty Half Tank

Nov 2, 2008 · Replies 3 · Nov 2, 2008

Replies: 3

Views: 3K

Undergrad Understanding Springs: What Happens with Applying Force?

Oct 26, 2008 · Replies 6 · Nov 2, 2008

Replies: 6

Views: 3K

Undergrad Solving Static Friction Problems: Finding n from Velocity

Nov 2, 2008 · Replies 1 · Nov 2, 2008

Replies: 1

Views: 2K

High School Plotting Force-Area Graphs: Answers Unveiled

Nov 1, 2008 · Replies 1 · Nov 2, 2008

Replies: 1

Views: 3K

Undergrad Calculation for proper power (in kW)

Nov 1, 2008 · Replies 4 · Nov 2, 2008

Replies: 4

Views: 2K

Undergrad Rotating bicycle wheel question

Oct 31, 2008 · Replies 4 · Nov 2, 2008

Replies: 4

Views: 3K

Undergrad Calculating Horse Power of Water in Hose

Nov 1, 2008 · Replies 7 · Nov 1, 2008

Replies: 7

Views: 3K

Graduate How is work done by a gas in an irreversible process calculated?

Mar 31, 2008 · Replies 3 · Nov 1, 2008

Replies: 3

Views: 23K

Undergrad I want to project a ping-p0ng ball

Nov 1, 2008 · Replies 1 · Nov 1, 2008

Replies: 1

Views: 2K

Graduate The Paradox of Torque Along the Y-Axis for a Gyrocompass

Oct 30, 2008 · Replies 1 · Oct 31, 2008

Replies: 1

Views: 2K

Undergrad Thrust for Car Acceleration: Understanding Piston Engine Force

Oct 29, 2008 · Replies 5 · Oct 30, 2008

Replies: 5

Views: 12K

High School Lifting Weight VS Pushing a Scale

Oct 27, 2008 · Replies 24 · Oct 30, 2008

Replies: 24

Views: 8K

Graduate What is the profile of the second fluid in laminar flow with two fluids?

Oct 29, 2008 · Replies 2 · Oct 30, 2008

Replies: 2

Views: 4K

Undergrad Testing the Impact of Different Prototypes: Dropping 20lbs from 10’

Oct 22, 2008 · Replies 4 · Oct 28, 2008

Replies: 4

Views: 3K

Undergrad Question about sending satellite circular orbit

Oct 27, 2008 · Replies 7 · Oct 28, 2008

Replies: 7

Views: 4K

High School Why is it water only enters the ear sometimes?

Oct 27, 2008 · Replies 3 · Oct 28, 2008

Replies: 3

Views: 2K

High School Understanding why an angle is the same as another one?

Oct 26, 2008 · Replies 3 · Oct 28, 2008

Replies: 3

Views: 2K

Undergrad Uniform Pully with a single block, do not understand where mass relates?

Oct 26, 2008 · Replies 5 · Oct 27, 2008

Replies: 5

Views: 3K

High School Why do smaller holes shoot higher jets of water?

Oct 23, 2008 · Replies 27 · Oct 27, 2008

Replies: 27

Views: 28K

Graduate What is the significance of the center of force in orbital mechanics?

Oct 27, 2008 · Replies 1 · Oct 27, 2008

Replies: 1

Views: 2K

Undergrad Question about mechanical energy in an isolated system

Oct 27, 2008 · Replies 2 · Oct 27, 2008

Replies: 2

Views: 3K

High School Why is the acceleration on a point on a wheel what it is.

Oct 26, 2008 · Replies 1 · Oct 27, 2008

Replies: 1

Views: 2K

Undergrad The air drag and magnus pass spin axis?

Oct 25, 2008 · Replies 11 · Oct 27, 2008

Replies: 11

Views: 4K

Undergrad Circular motion/Earth- I'm lost

Oct 25, 2008 · Replies 2 · Oct 26, 2008

Replies: 2

Views: 2K

Undergrad Why is linear speed at the top of the wheel 2r * omega?

Oct 25, 2008 · Replies 2 · Oct 26, 2008

Replies: 2

Views: 3K

High School Why is the pressure of two different liquids in a manometer the same?

Oct 26, 2008 · Replies 1 · Oct 26, 2008

Replies: 1

Views: 6K

High School Relation between velocity and force

Oct 26, 2008 · Replies 7 · Oct 26, 2008

Replies: 7

Views: 36K

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