Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Torque on a sign hung by a hinge
  • · Replies 3 ·
Replies
3
Views
890
Acceleration of a ball at its max height after being thrown upwards
  • · Replies 11 ·
Replies
11
Views
1K
Oscillation of fluids in a U tube
  • · Replies 17 ·
Replies
17
Views
3K
A microwave oven of mass 13.0kg is pushed a distance 8.80m up a ramp
  • · Replies 2 ·
Replies
2
Views
864
Free-body diagram: Spring-loaded cylinder sliding on a metal rod
  • · Replies 34 ·
2
Replies
34
Views
2K
A 2.8-kg block slides over the smooth icy hill -- Find the minimum speed to clear the pit
  • · Replies 1 ·
Replies
1
Views
985
A household fridge removes heat, determine power the fridge draws
  • · Replies 8 ·
Replies
8
Views
1K
Find h in the problem involving a stone thrown upwards
  • · Replies 5 ·
Replies
5
Views
817
Voltage-resistance graph for this circuit with a variable resistance
  • · Replies 4 ·
Replies
4
Views
975
Work done by a balloon that is rising
  • · Replies 8 ·
Replies
8
Views
1K
Coefficient of friction of a sandwiched body
  • · Replies 15 ·
Replies
15
Views
1K
Kinematics, is this a poorly worded question?
  • · Replies 7 ·
Replies
7
Views
1K
Efficiency of Stirling Cycle - Is it the same as the Carnot Engine?
  • · Replies 14 ·
Replies
14
Views
2K
Circular motion and moment of inertia - circle loop
  • · Replies 29 ·
Replies
29
Views
2K
Pressure question: Weight of a car calculated from tyre contact patch area
  • · Replies 3 ·
Replies
3
Views
1K
Ionic thruster high school science project
  • · Replies 2 ·
Replies
2
Views
1K
Rolling without Slipping Demo
  • · Replies 8 ·
Replies
8
Views
1K
RCL series circuit analysis: Damping Constant
  • · Replies 1 ·
Replies
1
Views
956
Electric field of a charged disc with a small circle cut out of it
  • · Replies 9 ·
Replies
9
Views
1K
Block tied to a fixed string on an accelerating wedge
  • · Replies 37 ·
2
Replies
37
Views
3K
Use of imaginary charge vs Gauss' law
  • · Replies 12 ·
Replies
12
Views
1K
Relation between the velocity vector and the acceleration vector of an object
  • · Replies 1 ·
Replies
1
Views
951
Issue deriving the third law of thermodynamics
  • · Replies 11 ·
Replies
11
Views
1K
First Law of Thermo: Audience body heat warming a concert hall
  • · Replies 25 ·
Replies
25
Views
2K
Rotational Dynamics problem with instantaneous frame of reference
  • · Replies 6 ·
Replies
6
Views
940
Distribution of Energy when work is done on a system of 2 masses connected by a spring
  • · Replies 17 ·
Replies
17
Views
2K
What Does -∂V/∂x Represent in Newton's Law?
  • · Replies 2 ·
Replies
2
Views
2K
How to approach this question using SUVAT equations?
  • · Replies 8 ·
Replies
8
Views
1K
Confused about kinematic equations
  • · Replies 20 ·
Replies
20
Views
4K
What is the relationship between tire size and pressure changes?
  • · Replies 13 ·
Replies
13
Views
1K
Moment of Inertia of Solid Sphere - Proof
  • · Replies 3 ·
Replies
3
Views
6K
Reading of Ammeter for this circuit with Voltage Controlled Resistors
  • · Replies 9 ·
Replies
9
Views
1K
Relation between Friction, Velocity, and Acceleration
  • · Replies 16 ·
Replies
16
Views
2K
Is this statement acceptable? (time derivative of a rotating vector)
  • · Replies 4 ·
Replies
4
Views
919
Entropy Change For Van Der Waals Gas
  • · Replies 5 ·
Replies
5
Views
753
Maximum Power dissipated at load resistor
  • · Replies 3 ·
Replies
3
Views
1K
Poiseuille law and friction force help
  • · Replies 5 ·
Replies
5
Views
801
Reversible, adiabatic expansion - Entropy Change
  • · Replies 5 ·
Replies
5
Views
1K
Linear momentum but quadratic kinetic energy?
  • · Replies 4 ·
Replies
4
Views
707
Are there two downward forces acting on the pivot of the rotating rod?
  • · Replies 67 ·
3
Replies
67
Views
4K
Thermodynamics: Violating Clausius => Violating Kelvin
  • · Replies 10 ·
Replies
10
Views
1K
The motion of a skateboarder along and above a ramp
  • · Replies 2 ·
Replies
2
Views
825
Deriving the particle's motion using numerical integration
  • · Replies 5 ·
Replies
5
Views
975
Circular motion, coin on a rotating disk
  • · Replies 2 ·
Replies
2
Views
1K
Angular velocity- A toy train rolls around a horizontal track
  • · Replies 8 ·
Replies
8
Views
1K
Energy stored in the steady state circuit
  • · Replies 7 ·
Replies
7
Views
1K
Solving Kinematics Problem: V_o & Max Height
  • · Replies 7 ·
Replies
7
Views
3K
Additivity of thermodynamic potentials?
  • · Replies 1 ·
Replies
1
Views
635
Two Forces Acting Simultaneously
  • · Replies 6 ·
Replies
6
Views
1K
Electric field of a finite linear distribution of charge
  • · Replies 18 ·
Replies
18
Views
2K
Conversion factor when converting from SI to natural units
  • · Replies 1 ·
Replies
1
Views
1K
How do I calculate forces in a truss cross section?
  • · Replies 2 ·
Replies
2
Views
897
Clausius' Theorem and Entropy
  • · Replies 8 ·
Replies
8
Views
1K
Circular argument? Justification of equipotential points
  • · Replies 16 ·
Replies
16
Views
1K
Is My Calculation of Work Along a Defined Curve Correct?
  • · Replies 4 ·
Replies
4
Views
892
Thermodynamics of a Heat Engine - (First/Second Law)
  • · Replies 2 ·
Replies
2
Views
786
Finding the distance of a peg so that a pendulum can circle around it
  • · Replies 2 ·
Replies
2
Views
1K
Energy of springs connected in series and parallel
  • · Replies 13 ·
Replies
13
Views
1K
The specific work done on an ideal gas during an adiabatic process in a piston-cylinder system
  • · Replies 13 ·
Replies
13
Views
2K
Relative electrical energy consumption for different light bulb color temperatures
  • · Replies 3 ·
Replies
3
Views
868
Frequency of Reflected light in special relativity
  • · Replies 1 ·
Replies
1
Views
707
Confusion about work done by a gas - Thermodynamics
  • · Replies 15 ·
Replies
15
Views
2K
Thermal exchange between warm object and ideal gas
  • · Replies 2 ·
Replies
2
Views
1K
Thermodynamics: Two gases in a container
  • · Replies 1 ·
Replies
1
Views
900
Show that the radius of the exoplanet is about 1/2 of Earth’s radius
  • · Replies 2 ·
Replies
2
Views
1K
Total Energy vs Average Energy (Thermo)
  • · Replies 11 ·
Replies
11
Views
1K
Electric flux from line charge through plane strip
  • · Replies 7 ·
Replies
7
Views
6K
Investigation into electric guitar pickups
  • · Replies 4 ·
Replies
4
Views
3K
Electric field created by point charges
  • · Replies 6 ·
Replies
6
Views
1K
Confusion about applying Faraday's law to a circuit
  • · Replies 3 ·
Replies
3
Views
1K
What's the energy stored in a parallel plate capacitor?
  • · Replies 14 ·
Replies
14
Views
2K
Mass Pulley and torque -- Confusion in this Atwood machine problem
  • · Replies 11 ·
Replies
11
Views
2K
Derive Gravitational Force and Field between two identical rods
  • · Replies 1 ·
Replies
1
Views
621
A particle slides down a non-fixed hemisphere
  • · Replies 3 ·
Replies
3
Views
1K
Two spring-coupled masses in an electric field (one of the masses is charged)
  • · Replies 1 ·
Replies
1
Views
1K
Find the equivalent resistance of this circuit
  • · Replies 31 ·
2
Replies
31
Views
5K
How Do I Draw a Decay Scheme in Radiochemistry?
  • · Replies 1 ·
Replies
1
Views
1K
Determine the type of measurement by classification
  • · Replies 2 ·
Replies
2
Views
704
Rope tension problem: Mass hanging from a rope tied at an angle
  • · Replies 21 ·
Replies
21
Views
2K
Potential in spherical shells
  • · Replies 2 ·
Replies
2
Views
1K
Internal Resistance Affect the Balancing Length in a Potentiometer?
  • · Replies 12 ·
Replies
12
Views
2K
Robot starts to overturn when reaching to pick up a load
  • · Replies 2 ·
Replies
2
Views
781
Distance rolled of sphere vs cylinder with same m, r, and v
  • · Replies 5 ·
Replies
5
Views
1K
Determine energy required to stop rolling mass
  • · Replies 10 ·
Replies
10
Views
986
Required force for sphere start rolling
  • · Replies 2 ·
Replies
2
Views
960
Conservation of String Exercise
  • · Replies 5 ·
Replies
5
Views
948
Reflection and Transmission of String Waves
  • · Replies 8 ·
Replies
8
Views
2K
Tension in a rope hanging between 2 trees
  • · Replies 24 ·
Replies
24
Views
2K
How do I calculate the Tension in a rope going over a smooth pulley?
  • · Replies 19 ·
Replies
19
Views
2K
Liquid rocket engine excercise
  • · Replies 1 ·
Replies
1
Views
1K
Connecting a number of EMF sources in a circle to form a circuit
  • · Replies 9 ·
Replies
9
Views
1K
Friction force on a ball falling through a body of water
  • · Replies 9 ·
Replies
9
Views
2K
Is the Trigonometric Analysis of Conveyor Belt Forces Correct?
  • · Replies 6 ·
Replies
6
Views
858
Gradient and Divergence in spherical coordinates
  • · Replies 3 ·
Replies
3
Views
2K
Making a vehicle go straight on carpet
  • · Replies 8 ·
Replies
8
Views
985
A Braking System with Spikes for Cars
  • · Replies 4 ·
Replies
4
Views
963
Torque on a Circular Current Loop under a Misaligned Magnetic Field
  • · Replies 1 ·
Replies
1
Views
1K
Rod with Current on Rails in Magnetic Field
  • · Replies 12 ·
Replies
12
Views
2K
A problem in applying Kirchhoff's Voltage Law
  • · Replies 1 ·
Replies
1
Views
1K
Body attached to a block by a spring, shaped like an inclined plane
  • · Replies 1 ·
Replies
1
Views
1K