1. (a) In the figure below, a person drops a 3.0 kg book to a friend who stands on the ground at distance D=10.0 m below. If the friend's outstretched hands are at distance d=1.8 m above the ground, calculate the change in gravitational potential energy of the book, AU. [2 marks] 国国 D
(b) In figure below, a 1.5 kg package slides along a floor with initial speed of 7, =10m/s. It then hits and compresses the spring until the package momentarily stops. Along the rough path, a magnitude of 20 N frictional force acts on the package. Calculate the speed of the package at 25 cm spring compression using conservation of energy. (The spring constant, k=1000 N/m) [4 marks] -Package Lecicie Tamale $92 Friction Frictionless
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