Static Equilibrium/1st Law

 

Newton's First Law

Isaac Newton; definition of force; fundamental forces in nature; Newton's first law of motion defined; definition of inertia; inertial reference frames.

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Definition of inertial mass; standard kilogram; definition of momentum (p = m*v).

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Free Body Diagrams

Method for solving static equilibrium problems by drawing all relevant objects and forces.

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Newton's Laws

Newton's first law defined; Newton's second law defined (F = m*a); Newton's third law defined; inertial reference frames defined.

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Newton's Laws of Motion

Newton's three laws of motion defined with a sentence each.

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Applying Newton's Second Law

Definition of a reference frame; relative and relatively inertial reference frames; law of addition of velocities, with exam problemple problem; acceleration in relatively inertial reference frames; principle of relativity; tension in a massless rope; equations of motion, with special cases; constraint conditions in pulley systems.

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Experiment 5A

Static equilibrium experiment setup and procedure.

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Static Equilibrium Problem Solving Strategies

Two conditions for static equilibrium; step-by-step problem solving strategy for static equilibrium problems; torque sign convention.

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Static Equilibrium of a Forearm

Analysis of forces and torques acting on a forearm supporting a mass.

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Static Equilibrium of a Suspended Beam

Analysis of forces and torques acting on a beam suspended from a wall by a cable.

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Static Equilibrium of an Ankle

Analysis of forces and torques acting on an ankle of a crouching person.

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Experiment 5A Analysis

Forces acting on a suspended rope and on a rope wraped around a capstan.

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Static Equilibrium of the Knee

Forces and torques acting on the knee of a crouching man.

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Force and Acceleration

4-part problem; finding force for given acceleration; finding velocity at given time; balancing force to make a = 0. Solutions are given below each problem.

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Balloon Attached to a Block

3-part problem; force and acceleration on the block and force on balloon from wind. Solutions are given below each problem.

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Block Hanging From Two Ropes

4-part problem; free-body diagram and tension while hanging; speed and tension after one rope is cut. Solutions are given below each problem.

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Addition of Force Vectors

Net force on an object resulting from three independent forces.

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Static Equilibrium

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Forces acting on a stationary block.

Forces and torques acting on a plank holding a mass of bricks and supported by cables.

Forces and torques acting on a plank leaning against a wall.

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Forces and torques acting on the back of a bending person.

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Equilibrium of a Pushup

Forces and torques acting on a person doing a pushup.

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Static Equilibrium in the Ankle

Finding tension in Achilles tendon, angle of leg with vertical, and force on tibia.

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Static Equilibrium of an Arm

Forces and torques acting on an extended arm.

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