help with a to d z. Consider a 4.0 kg book on a 1.5 m tall table. A hand lifts t
ID: 1400093 • Letter: H
Question
help with a to d z. Consider a 4.0 kg book on a 1.5 m tall table. A hand lifts the book from its a. Choose of the place on the table to a location 1.0 m above the table a coordinate system where y O is at the height table. What is the gravitational potential energy of the book both 15m at the table level and 1.0 m above the table? g, b. How much energy is required to move the book as described? und level. What is the gravitational potential Choose a coordinate system where y = 0 is at gro energy ofthe book at both the table level and 1.0 m above the table? How much energy is required to move the book as described? Does your answer make sense? Explain. mate f the following, describe a physical scenario where energy is transformed in the mannerExplanation / Answer
here,
mass of book , m = 4 kg
(a)
the gravitational potential energy at the table level(h = 0) , P = m * g * h
therefore ,
the gravitational potential energy at the table level is 0
the gravitational potential energy at 1m above the table( y = 1) , PE = m * g * h
PE = 4 * 9.8 * 1
PE = 39.2 J
the gravitational potential energy at 1m above the table is 39.2 J
(b)
energy required to move the book as discribed is (39.2 -0) J
energy required to move the book as discribed is 39.2 J
(c)
when y = 0 at the ground level,
the gravitational potential energy at the table level(y = 1.5) , PE1 = m * g * 1.5
PE1 = 4 * 9.8 * 1.5
PE1 = 58.8 J
the gravitational potential energy at the table level(y = 1.5) is 58.8 J
the gravitational potential energy at 1m above the table level(y = 2.5), PE = m * g * 2.5
PE = 4 * 9.8 * 2.5
PE = 98 J
the gravitational potential energy at 1m above the table level is 98 J
(d)
energy required to move the book as discribed is (98 - 58.8 ) J
energy required to move the book as discribed is 39.2 J
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