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Work, Energy and Power – page 2 22. A force of 5.0 N moves a 6.0 kg object along a rough floor at a constant speed of 2.5 m/s. (a) How much work is done in 25 s? (b) What power is being used? (c) What force of friction is acting on the object? 23.
PF1.5: WORK, ENERGY AND POWER. Energy exists in many different forms, eg, kinetic energy Ek, potential energy Ug, electrical energy, and elastic (or spring) energy Es. A fundamental principle of nature is that energy cannot be created or destroyed, only transformed or transferred.
1. _________________________________ is the rate at which work is done. 2. When calculating power, you should use the formula P = _________________ divided by _____________. In this formula, “P” stands for power, ____ stands for work, and _____ for time. 3.
We describe the rate of energy dissipation over time as power (P), and we express power in the unit of the watt (W). Write the equation relating power to voltage and current, for an electrical resistance.
1. Find the power of a lift that transfers 450 J of energy in 15 seconds 2. An electric motor transfers 8000 J of energy in 2.5 seconds. Calculate its power. 3. A weightlifter gives a dumbbell 6 00 J of gravitational potential energy store in 1.2 seconds. What is the weightlifter’s power? 4.
Teacher Toolkit - The Basics of Work, Energy, and Power Objectives: 1. 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. 2. To define potential energy, to identify the two forms and the variables that affect the amount of each form, and
The Basics of Work, Energy, and Power Objectives: 1. 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. 2. To define potential energy, to identify the two forms and the variables that affect the
