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Review the units of work, energy, force, and distance. Use the equations for mechanical energy and work to show what is work and what is not. Make it clear why holding something off the ground or carrying something over a level surface is not work in the scientific sense.
- 15.1 The Electromagnetic Spectrum
Teacher Support [BL] Explain that the term spectrum refers...
- 22.4 Nuclear Fission and Fusion
As shown in Figure 22.26, a neutron strike can cause the...
- 23.1 The Four Fundamental Forces
Understanding the Four Forces. The gravitational force is...
- 11.1 Temperature and Thermal Energy
The Kelvin scale is the temperature scale that is commonly...
- 22.1 The Structure of The Atom
Rutherford’s Experiment. In the early 1900’s, the plum...
- 23.3 The Unification of Forces
As discussed earlier, the short ranges and large masses of...
- 21.3 The Dual Nature of Light
Figure 21.10 shows a comet with two prominent tails. Comet...
- 15.1 The Electromagnetic Spectrum
type. The amount of energy transformed (∆E) is called work W. The body losing energy does work, the body gaining energy has work done on it. Work is given by the force multiplied by the displacement through which the force acts, or: where F = force (N), d = displacement (m) KE = ½ mv2 Work = Change in Energy = Force × displacement
Continuity Equation P + ½ v 1 2 + gy = P 2 + ½ v 2 + gy ernoulli’s Equation GASES = F A Pressure p 1 V 1 = p 2 V 2 oyle’s Law V1 T1 = V2 T2 harles’ Law V1 n1 = V2 n2 Avogadro’s Principle p1V1 T1 = 2 V2 2 Combined Gas Law pV = nRT Perfect Gas Law p total = p A + p B + p C + … p A C= χ A p total Dalton’s Law of Partial Pressures ...
Evaluate the work done for various forces. In physics, work represents a type of energy. Work is done when a force acts on something that undergoes a displacement from one position to another. Forces can vary as a function of position, and displacements can be along various paths between two points.
To calculate the work done on an object by a force during a displacement, we use only the force component along the object’s displacement. The force component perpendicular to the displacement does zero work. = F d = F cos φ ⋅ d = F ⋅ d ( 7.3) x. φ. d. - Assumptions: 1) F=cte, 2) Object particle-like. Units: 1 Joule = 1J = 1 kgm2/s2.
Physics 101 Formulas 12/2/2019 1 Kinematics 𝒗𝑎 = 𝛥𝒙 𝛥 𝒂𝑎 = 𝛥𝒗 𝛥 𝑣 = 𝑣0 + 𝑎𝑡 = 0 + 𝑣0𝑡 + 1 2 𝑎𝑡2 𝑣2 = 𝑣 0 2 + 2𝑎𝛥 = 9.8 m/s2 = 32.2 ft/s2 (near Earth’s surface) Dynamics 𝛴𝑭 = I𝒂 𝑖 ℎ𝑡 = (near Earth’s surface)
Teacher Toolkit. Topic: The Basics of Work, Energy, and Power. Objectives: To describe the conditions under which positive and negative work are done and to use the work equation to calculate the amount of work done.
