Techniques and Procedures I RC 170

1. 1 Techniques and Procedures IRC 170 Basic Physics For Respiratory Therapist

2. 2 Energy Energy- the ability to do work Work = force X distance Kinetic energy- energy that an object possesses when it is in motion. Potential energy or stored energy- the energy an object possesses because of its position. (energy of position, gravitaxl) Energy & Matter Energy & Work Energy The ability to do work Work (W)ork =(F)orce x(D)istance Only performed when the effort produces a change in position SI Units Joules (J) = 1 (N)ewton acting on 1kg to move it 1m (P)ower = (W)ork /(t)ime Expressed in (W)atts 1W = 1J/sec (hp)horsepower = 746W Kinetic & Potential Energy Kinetic Energy of Motion KE = �(mv2) KE is directly related to mass Doubling the mass doubles the KE KE is proportional to the square of velocity Doubling velocity quadruples KE Potential Energy of position, stored energy, result of gravity Correctly termed gravitational potential energy PE = mgh m = mass, g = gravity, h = height can also be stored in springs, chemical bonds, etc. Energy & Matter Energy & Work Energy The ability to do work Work (W)ork =(F)orce x(D)istance Only performed when the effort produces a change in position SI Units Joules (J) = 1 (N)ewton acting on 1kg to move it 1m (P)ower = (W)ork /(t)ime Expressed in (W)atts 1W = 1J/sec (hp)horsepower = 746W Kinetic & Potential Energy Kinetic Energy of Motion KE = �(mv2) KE is directly related to mass Doubling the mass doubles the KE KE is proportional to the square of velocity Doubling velocity quadruples KE Potential Energy of position, stored energy, result of gravity Correctly termed gravitational potential energy PE = mgh m = mass, g = gravity, h = height can also be stored in springs, chemical bonds, etc.

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