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A student lifts a 1.4-kg physics book to a height of 43 cm and then puts it down to its original position Assume that the speed of the book remains constant during the entire process. The work done by the student while lifting the book up, W1 Units Select an answer v The work done by the gravity force while lifting the book up, W2 = Units Select an answer The work done by the student while putting the book down, W₃ = Units Select an answer The work done by the gravity force while putting the book down, W4 = Units Select an answer If the book is lifted up in 2.05 seconds, how much power was developed by the student? P = Units Select an answer

Answer 1

Soon: milung her 0.43 Since, speed remains const during entire proces. Force exerted by student is equal to weight of book in entire processo (co, = mgh=50qJ (W2 = -mg h=-s.aJ 3= -mgh= -5.95 Ww= mgh=5.95 P= = 5.9 = 20$8..coatt 2.05 P = 2088 cu