PPT-P. Sci. Unit 3 Work, Power, and Machines

SPS8 Students will determine relationships among force mass and motion SPS8e Calculate amounts of work and mechanical advantage using simple machines Work When a force causes an object to move work is done. Let be the probability or fraction of time of being in state Balancing the 64258ow between state 0 and 1 yields 951 and similarly balancing the 64258ow between state 1 and 2 951 Together with the normalization 1 we get 1 ii The maximal throughp What do the F and d stand for?. What are the units for F and d?. What do the W and t stand for?. What is the unit for t?. Work is a form of energy. What is the unit for work and energy?.  . Work and Power. Extreme. Perspectives on the Future of AI. According to: . Ray . Kurzweil. Bill Joy. Doug Hofstadter. Anonymous. How plausible are these works . of science fiction? . Ray Kurzweil and “The Singularity”. Nabil. I El-. Sawalhi. Associate Professor. Construction Management. Building Plants. GENERAL CONSIDERATIONS . BULLDOZERS . SCRAPERS . GRADERS . TRACTOR SHOVELS . EXCAVATORS . TRANSPORT VEHICLES . HOISTS . Work. Work is done when a . force . (push or pull) causes an object to move in the . same direction . that the force is applied.. Formula: Work= Force x Distance . (W = F x D). If there is no movement, there is no work.. Power. The idea of . power. incorporates both the concepts of work and time. . Power is work done per unit time.. Average power, P is the average rate at which work . W. is done, and it is obtained by dividing . Lets see what you already know.. What is a machine? . A thing that makes work easier to do. . Can you name some simple machines? . Scissors, screws, levers, hammers, wheels and axles,...... And more complicated machines? . power. incorporates both the concepts of work and time. . Power is work done per unit time.. Average power, P is the average rate at which work . W. is done, and it is obtained by dividing . W. by the time t required to perform the work:. Why do we use machines?. Machines make doing work easier.. But they do not decrease the work that you do.. Instead, they . change the way you do work.. In general you trade more force for less distance or less force for more distance. IPC Spring . 2014. Energy, Work, Power & Machines. 1. Energy. is the ability to do work. .  . Potential energy. – stored energy or energy due to position.  . PE=m g h . m. is mass (kg). g. Work is the product of the force on an object and the distance through which the object is moved: the quantity . force . ×. distance. Work. If the force is constant and the motion takes place in a straight line in the direction of the force, the work done on an object by a net force is the product of the force and the distance through which the object is moved.. Chapter . 14, . pg . 412-435. Today’s Learning Objectives. Know the vocabulary of this chapter.. What is the two-pronged test to see if something qualifies as work?. Solve and calculate problems about work.. Work, Power, and Machines Physical Science Chapter 13 Section 1 Work Occurs when a force causes an object to change its motion or position. Calculated by multiplying the force by the distance over which the force is applied. OBJ. : . Students will determine relationships among force, mass, and motion.. OBJ. : . Calculate amounts of work and mechanical advantage using simple machines.. Work. When a force causes an object to move – work is done..