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Page 1 Work, Energy & Power Flash cards Page 2 Work, Energy & Power Flash cards Work done by a constant force (continued) Work done by a constant force during displacement of point of application of force is Page 3 Work, Energy & Power Flash cards Work done by a constant force (continued) Work done by a constant force during displacement of point of application of force is Work done by a constant force W = F x (x 2 – x 1 ) + F y (y 2 – y 1 ) + F z (z 2 – z 1 ) Where Page 4 Work, Energy & Power Flash cards Work done by a constant force (continued) Work done by a constant force during displacement of point of application of force is Work done by a constant force W = F x (x 2 – x 1 ) + F y (y 2 – y 1 ) + F z (z 2 – z 1 ) Where The work is said to be positive if the angle between force and displacement is acute (? < 90 ° ) because W = = F S cos ? and cos ? = (+)ve when ? < 90º. The positive work means that the external force supplies energy to the system or body. Page 5 Work, Energy & Power Flash cards Work done by a constant force (continued) Work done by a constant force during displacement of point of application of force is Work done by a constant force W = F x (x 2 – x 1 ) + F y (y 2 – y 1 ) + F z (z 2 – z 1 ) Where The work is said to be positive if the angle between force and displacement is acute (? < 90 ° ) because W = = F S cos ? and cos ? = (+)ve when ? < 90º. The positive work means that the external force supplies energy to the system or body. Negative Work The work is said to be negative if the angle between force and displacement is obtuse (? > 90 °) because cos? = (–)ve when ? > 90 °. The negative work means that the force is extracting energy from the system.Read More
127 videos464 docs210 tests

127 videos464 docs210 tests
