EOSC 114 Lecture Notes - Lecture 3: Enhanced Fujita Scale, Torro Scale, Latent Heat
20 Apr 2018
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Energy causes things to move or change. Related to: force, work, power, pressure, stress, and others. Force (f): a force pushes or pulls. 1 (n) = 1 (kg m / s^2) A 15 km/h breeze against your body pushes with the force of 1 n. Baker on the earth"s crust is about 5 x 10^14 n (500 trilion n) A force that attracts matter (i. e. masses) to each other. Objects of mass m near the earth"s surface are pulled with force: Work (w): if you push an object with force (f) across a distance (d) then you are doing. Si unit of work (and all energy) is the joule (j) The work needed to raise an object of mass m (in kg) a distance z (in metres) against the pull of gravity g (9. 8 m/s^2) is called potential energy (pe) Pe = g m z.
