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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.
Use the formula to calculate work done by force at an angle to the direction of motion. work done = 7cos60° × 10. = 35J. Gravitational Potential Energy. The gravitational potential energy of an object with mass at a height h above ground can be calculated by: = h.
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)
PHYS 1301 Equation Sheet 1 Vectors Work, Energy, and Power Equations ⃗= ë ̂+ ì ̂ =√ ë2+ ì2 = 𝜃 (for constant force) sin𝜃= ℎ , cos𝜃= 𝑎 ℎ , tan𝜃=
1. Find the total energy of the particle at the beginning and end of the described motion. 2. Find the change 600in energy, by subtracting the final energy from the initial energy. 3. Find the work done by the external force on the particle. 4. Equate this to the change in energy and solve for any unknown constants.
Work-energy theorem: The net/total work done on an object is equal to the change in the object’s kinetic energy. In symbols: Wnet = ∆ EK. 2 Wnet = 2m(vf. - vi 2) Conservative force: The work done by the force in moving an object between 2 points is independent of the path taken ex. gravitational, electrostatic and elastic forces.
Work, Energy and Power formulae www.vaxasoftware.com Work of a constant force (Force is parallel to displacement) (Work of force of friction) W F x cos W F x W FFRIC x Kinetic energy 2 2 1 EK mv Gravitational potential energy (Near a planet surface) EP m g h Gravitational potential energy r M m EP G Elastic potential energy 2 2 1 EP k x
