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High School Friction in Vacuum: Does Rubbing Hands Create Heat?

Nov 24, 2015 · Replies 1 · Nov 24, 2015

Replies: 1

Views: 1K

Graduate Finding moment of inertia of irregular object with calculus?

Nov 23, 2015 · Replies 3 · Nov 24, 2015

Replies: 3

Views: 3K

Graduate Equation for Damping in an Ideal Mass-Spring System

Nov 24, 2015 · Replies 2 · Nov 24, 2015

Replies: 2

Views: 2K

Graduate Can't Find 2D Elastic Modulus Equation

Oct 28, 2015 · Replies 47 · Nov 23, 2015

2

Replies: 47

Views: 6K

Undergrad What is the relationship between work and pressure in a PV graph?

Nov 23, 2015 · Replies 1 · Nov 23, 2015

Replies: 1

Views: 1K

High School Why Is Sound Produced by Vibrations?

Nov 22, 2015 · Replies 11 · Nov 23, 2015

Replies: 11

Views: 4K

Undergrad Is Grounding a Shell Equivalent to Zero Electrical Charge?

Nov 23, 2015 · Replies 6 · Nov 23, 2015

Replies: 6

Views: 1K

Graduate Calculate Rolling & Friction for Ball Motion in Plane w/ Force Field

Jul 21, 2014 · Replies 8 · Nov 23, 2015

Replies: 8

Views: 3K

Undergrad Time Derivative of Force: What is the Missing Variable?

Nov 21, 2015 · Replies 5 · Nov 22, 2015

Replies: 5

Views: 3K

Undergrad Increasing speed by decreasing intertia?

Nov 21, 2015 · Replies 2 · Nov 22, 2015

Replies: 2

Views: 1K

Undergrad Calculate force in north/east directions given 2 components

Nov 16, 2015 · Replies 1 · Nov 22, 2015

Replies: 1

Views: 2K

Undergrad Vibrations in a glass with water.

Nov 21, 2015 · Replies 5 · Nov 21, 2015

Replies: 5

Views: 3K

Undergrad Strange acceleration graph during a jump

Sep 13, 2015 · Replies 9 · Nov 21, 2015

Replies: 9

Views: 5K

Undergrad Does the kinetic theory work for solids?

Nov 20, 2015 · Replies 3 · Nov 21, 2015

Replies: 3

Views: 1K

Graduate Regarding momentum transfer, couple questions.

Nov 20, 2015 · Replies 4 · Nov 20, 2015

Replies: 4

Views: 2K

Graduate At what pressure does steam exiting a nozzle reach mach 1

Nov 19, 2015 · Replies 5 · Nov 20, 2015

Replies: 5

Views: 4K

Graduate Acceleration of Rest Point for Rolling without Slipping

Nov 20, 2015 · Replies 6 · Nov 20, 2015

Replies: 6

Views: 2K

High School Travel 5 Meters in 1 Second: Explaining d=vt+1/2a(t)^2

Nov 14, 2015 · Replies 18 · Nov 20, 2015

Replies: 18

Views: 4K

Undergrad Calculating bullet velocity reduction over time

Nov 16, 2012 · Replies 22 · Nov 20, 2015

Replies: 22

Views: 49K

Undergrad Average Speed in Kinetic-Molecular model

Nov 19, 2015 · Replies 3 · Nov 20, 2015

Replies: 3

Views: 1K

Graduate Are streamlines parallel in inviscid and irrotational flow

Nov 19, 2015 · Replies 3 · Nov 20, 2015

Replies: 3

Views: 2K

Undergrad Work done by conservative force

Nov 14, 2015 · Replies 27 · Nov 20, 2015

Replies: 27

Views: 5K

Undergrad What is needed to allow sound to move an object

Nov 18, 2015 · Replies 6 · Nov 20, 2015

Replies: 6

Views: 2K

Undergrad How do I calculate a "medium" jerk value of my motion data?

Nov 13, 2015 · Replies 5 · Nov 19, 2015

Replies: 5

Views: 3K

Undergrad Kelvin's thunderstorm generator

Oct 24, 2013 · Replies 7 · Nov 19, 2015

Replies: 7

Views: 4K

Undergrad Can Resolving Forces Differently Lead to Contradictory Equations?

Nov 19, 2015 · Replies 6 · Nov 19, 2015

Replies: 6

Views: 2K

Undergrad Newton's 3rd law and force equilibrium

Nov 18, 2015 · Replies 13 · Nov 19, 2015

Replies: 13

Views: 3K

Undergrad Capillary action speed formula?

Nov 18, 2015 · Replies 2 · Nov 19, 2015

Replies: 2

Views: 5K

Undergrad How does air travel after leaving a nozzle?

Nov 18, 2015 · Replies 2 · Nov 19, 2015

Replies: 2

Views: 2K

Undergrad Force measurement from accelorometer in Soccer ball

Nov 18, 2015 · Replies 3 · Nov 19, 2015

Replies: 3

Views: 1K

Undergrad Air vs water as insulation for my cold frame

Nov 18, 2015 · Replies 3 · Nov 18, 2015

Replies: 3

Views: 8K

Graduate Shell Theorem Q: Understand Gravity Inside/Outside Hollow Sphere?

Nov 18, 2015 · Replies 2 · Nov 18, 2015

Replies: 2

Views: 2K

Graduate Comparing force of static object to that of an impact force

Nov 17, 2015 · Replies 4 · Nov 18, 2015

Replies: 4

Views: 3K

Undergrad How can you land safely when falling from free fall?

Nov 17, 2015 · Replies 2 · Nov 17, 2015

Replies: 2

Views: 1K

Undergrad The Curious Case of Pascal Barrels

Nov 17, 2015 · Replies 8 · Nov 17, 2015

Replies: 8

Views: 3K

Undergrad Relation Between Spring Constant and Angular Velocity

Nov 17, 2015 · Replies 7 · Nov 17, 2015

Replies: 7

Views: 18K

Undergrad Calculating/simulating effect of mass changes in a gyroscope

Nov 11, 2015 · Replies 1 · Nov 17, 2015

Replies: 1

Views: 2K

High School Can Falling From a Chair and a Building Cause Different Levels of Injury?

Nov 16, 2015 · Replies 4 · Nov 16, 2015

Replies: 4

Views: 2K

Undergrad Lack of Orientation of a Point Mass

Nov 16, 2015 · Replies 2 · Nov 16, 2015

Replies: 2

Views: 2K

Graduate Finding Optimal Axis of Rotation with Constraints

Nov 7, 2015 · Replies 10 · Nov 16, 2015

Replies: 10

Views: 2K

High School Throw Snowball from Car for Maximum Force: Physics Explained

Nov 15, 2015 · Replies 5 · Nov 16, 2015

Replies: 5

Views: 2K

Undergrad Safe speeds in roller coasters

Nov 15, 2015 · Replies 12 · Nov 16, 2015

Replies: 12

Views: 5K

High School How does rotation have vectors?

Nov 15, 2015 · Replies 2 · Nov 15, 2015

Replies: 2

Views: 1K

Undergrad Centrifugal speed (MPH) converted to G's

Nov 15, 2015 · Replies 7 · Nov 15, 2015

Replies: 7

Views: 3K

Graduate Potential energy in an external field

Nov 15, 2015 · Replies 3 · Nov 15, 2015

Replies: 3

Views: 2K

Graduate Query on the Euler Theorem for Rigid Body Rotation

Nov 14, 2015 · Replies 4 · Nov 15, 2015

Replies: 4

Views: 2K

Undergrad What is the Force Generated by a Rotating Rod on a Square Plate?

Nov 13, 2015 · Replies 5 · Nov 13, 2015

Replies: 5

Views: 1K

Undergrad What factors affect car braking distance?

Nov 12, 2015 · Replies 7 · Nov 13, 2015

Replies: 7

Views: 5K

Undergrad How the Classic Loop the loop works

Nov 12, 2015 · Replies 2 · Nov 12, 2015

Replies: 2

Views: 1K

Graduate Power needed to move a vehicle against inertia

Nov 12, 2015 · Replies 10 · Nov 12, 2015

Replies: 10

Views: 3K

Undergrad Inelastic collision for equal masses

Nov 11, 2015 · Replies 6 · Nov 12, 2015

Replies: 6

Views: 2K

Undergrad What happens if I have a rotating half-wave plate?

Nov 12, 2015 · Replies 3 · Nov 12, 2015

Replies: 3

Views: 2K

Undergrad Assumption in a momentum problem

Nov 12, 2015 · Replies 8 · Nov 12, 2015

Replies: 8

Views: 2K

Undergrad Solving Kinematics Problem for Landslide Hazard Map

Nov 12, 2015 · Replies 1 · Nov 12, 2015

Replies: 1

Views: 1K

High School How the plug works in both in both directions in socket?

Nov 12, 2015 · Replies 7 · Nov 12, 2015

Replies: 7

Views: 3K

High School Kinetic energy and potential energy relationship

Nov 11, 2015 · Replies 17 · Nov 12, 2015

Replies: 17

Views: 2K

Undergrad Why Does the String in a Pulley System Apply a Downward Force of 2T?

Nov 11, 2015 · Replies 6 · Nov 11, 2015

Replies: 6

Views: 2K

Undergrad Why Do Ultrasound Axial Resolution Phantoms Show Stretched Black Dots?

Nov 6, 2015 · Replies 1 · Nov 11, 2015

Replies: 1

Views: 2K

Graduate Understanding Rolling Without Slipping

Nov 11, 2015 · Replies 11 · Nov 11, 2015

Replies: 11

Views: 4K

Graduate Missing something obvious in this derivation

Nov 10, 2015 · Replies 5 · Nov 11, 2015

Replies: 5

Views: 1K

Undergrad Newton's Law of Cooling temp graph

Nov 11, 2015 · Replies 2 · Nov 11, 2015

Replies: 2

Views: 3K

Undergrad Rotation of a rigid body about external axis

Nov 8, 2015 · Replies 10 · Nov 11, 2015

Replies: 10

Views: 4K

Undergrad Displacement equation due to acceleration

Nov 10, 2015 · Replies 7 · Nov 10, 2015

Replies: 7

Views: 2K

Undergrad Centripetal force due to banked curves

Nov 9, 2015 · Replies 8 · Nov 10, 2015

Replies: 8

Views: 3K

Undergrad Adding Vector Problem: Is There More?

Nov 10, 2015 · Replies 2 · Nov 10, 2015

Replies: 2

Views: 1K

High School What is the equation of continuity?

Nov 10, 2015 · Replies 12 · Nov 10, 2015

Replies: 12

Views: 3K

Undergrad A different bouncy ball question....

Nov 10, 2015 · Replies 4 · Nov 10, 2015

Replies: 4

Views: 1K

High School Explaining Pressure: Candle + Water + Jar Experiment

Nov 10, 2015 · Replies 3 · Nov 10, 2015

Replies: 3

Views: 5K

High School Is absolute pressure same as gauge pressure?

Nov 10, 2015 · Replies 3 · Nov 10, 2015

Replies: 3

Views: 2K

Graduate Average acceleration and total acceleration of gravity

Nov 9, 2015 · Replies 5 · Nov 10, 2015

Replies: 5

Views: 2K

Undergrad In one sentence: What is sound?

Nov 9, 2015 · Replies 8 · Nov 10, 2015

Replies: 8

Views: 1K

Graduate Rotation of line about rotating axis

Nov 9, 2015 · Replies 3 · Nov 10, 2015

Replies: 3

Views: 2K

Graduate What does Hinge Reaction signify ? How do i calculate it ?

Nov 9, 2015 · Replies 1 · Nov 10, 2015

Replies: 1

Views: 3K

Undergrad Why isn't momentum conserved in this elastic collision?

Nov 9, 2015 · Replies 3 · Nov 9, 2015

Replies: 3

Views: 2K

Undergrad Calculate Force Applied to Rope for Frictional Torque

Nov 9, 2015 · Replies 2 · Nov 9, 2015

Replies: 2

Views: 5K

Graduate Finding force vectors of gravity along a curve

Nov 8, 2015 · Replies 10 · Nov 9, 2015

Replies: 10

Views: 2K

Undergrad Looking for formula for lateral and/or eccentric loads

Oct 20, 2015 · Replies 5 · Nov 9, 2015

Replies: 5

Views: 1K

Undergrad Gravitational Force (F) Undefined: What Does it Mean?

Nov 9, 2015 · Replies 6 · Nov 9, 2015

Replies: 6

Views: 2K

High School Applying Physics to Boxing, does speed create power?

Nov 8, 2015 · Replies 11 · Nov 9, 2015

Replies: 11

Views: 7K

High School Coefficient of friction different for different angles.

Nov 9, 2015 · Replies 5 · Nov 9, 2015

Replies: 5

Views: 2K

Graduate Coefficient of restitution in different frames of references

Nov 6, 2015 · Replies 1 · Nov 9, 2015

Replies: 1

Views: 2K

Undergrad Understanding Tension in Falling and Rolling Objects: Explained

Nov 8, 2015 · Replies 8 · Nov 9, 2015

Replies: 8

Views: 4K

Undergrad Gravitational Plot: Accuracy Checked

Nov 8, 2015 · Replies 7 · Nov 8, 2015

Replies: 7

Views: 1K

Graduate Can Nonuniform Mass Density Objects Experience Torque in Free Fall?

Oct 17, 2015 · Replies 21 · Nov 8, 2015

Replies: 21

Views: 5K

Undergrad Quick question about exhaust velocity

Nov 8, 2015 · Replies 2 · Nov 8, 2015

Replies: 2

Views: 1K

Undergrad Rotational Kinematics - angle between force and velocity

Nov 7, 2015 · Replies 7 · Nov 8, 2015

Replies: 7

Views: 6K

Graduate Copper K alpha lines, ionization potential, confused

Nov 8, 2015 · Replies 1 · Nov 8, 2015

Replies: 1

Views: 2K

Undergrad Gravity / pressure as we move towards centre of Earth

Jul 9, 2014 · Replies 17 · Nov 8, 2015

Replies: 17

Views: 12K

Graduate Can you derive SUVAT equations using a Langrangian?

Nov 2, 2015 · Replies 17 · Nov 8, 2015

Replies: 17

Views: 2K

Undergrad What Forces Cause Rotational Emissions?

Nov 7, 2015 · Replies 2 · Nov 8, 2015

Replies: 2

Views: 2K

Undergrad Solving Torque & Moment: Deriving V=PQsintheta

Nov 6, 2015 · Replies 4 · Nov 8, 2015

Replies: 4

Views: 2K

Graduate A rod in free fall with varying length

Nov 6, 2015 · Replies 8 · Nov 7, 2015

Replies: 8

Views: 2K

Undergrad Constraint Equation of a rolling of cylinder

Nov 7, 2015 · Replies 1 · Nov 7, 2015

Replies: 1

Views: 2K

Undergrad Does Pressure Gradient Exist with Uniform Pressure on All Sides?

Nov 7, 2015 · Replies 20 · Nov 7, 2015

Replies: 20

Views: 3K

High School Flummoxed by a Freezer: A Puzzling Noise Mystery

Nov 7, 2015 · Replies 3 · Nov 7, 2015

Replies: 3

Views: 1K

Graduate Two strings connected by a spring

Nov 5, 2015 · Replies 7 · Nov 6, 2015

Replies: 7

Views: 2K

Graduate Continuous thrust orbit changes

Nov 5, 2015 · Replies 4 · Nov 6, 2015

Replies: 4

Views: 2K

Undergrad What is the Significance of Instantaneous Acceleration in Classical Physics?

Nov 6, 2015 · Replies 7 · Nov 6, 2015

Replies: 7

Views: 3K

Undergrad What is the Lift Coefficient of a Basketball?

Nov 4, 2015 · Replies 13 · Nov 6, 2015

Replies: 13

Views: 6K

High School Is sound amplified underwater?

Nov 6, 2015 · Replies 2 · Nov 6, 2015

Replies: 2

Views: 4K

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