The condition of a system when neither its state of motion nor its internal energy state tends to change with time. It experiences neither linear acceleration nor angular acceleration
State where the sum of the forces acting on an object is zero, giving it no net acceleration.
The state of an object when all forces acting on it sum to zero.
If any velocities are nonzero, but all velocities are constant
a twisting force
Magnitude of torque; magnitude of applied force, perpendicular distance from axis of rotation (should be 90 degrees).
The perpendicular distance from the axis of rotation to a line drawn along the direction of the force. t=Fl
Equilibrium equations (no acceleration)
Non-equilibrium equations (3 acceleration)
*add ma to the weaker side
The capacity of a physical system to do work; is a scalar
Is the kinetic and potential energy of macroscopic systems
Kinetic energy, K=1/2mv^2
The mechanical energy that a body has by virtue of its motion.
The mechanical energy that a body has by virtue of its position
Gravitational potential energy, U=mgh
Energy due to the force of gravity near the Earth's surface. Is also depends on the height of an object.
Elastic potential energy. Is the energy due to the resistive force applied by a deformed object.
Law of Conservation of Energy
The fundamental principle that the total energy of an isolated system is constant despite internal changes
Is the transfer of energy via a force. Is a scalar and is measured in units of energy (joules). (without friction)
Is the transfer of energy by natural flow from a warmer body to a colder body.
Total energy transfer due to forces (no heat)
Total mechanical energy
W=∆K+∆U, (no heat, no friction)
Law of Conservation of Mechanical Energy
The sum of potential and kinetic energies of ideal energy system are constant. 0=∆K+∆U
Forces for which the work done does not depend on the path taken but only on the initial and final positions (ex. gravity)
Are forces that change the mechanical energy of a system when they do work.
Work done by friction
The rate of doing work.
Clockwise torques are ________, CCW torques are _______.
When force and displacement are perpendicular, the work done is _____, therefore the centripetal force does no work
A system where energy and mass are exchanged with the surroundings
A system where energy is exchanged with the surroundings but mass is not.
A system where neither energy nor mass is exchanged with the surroundings
Maximum torque when θ=____