**E16.** At a given instant in time, a 14.5-kg rock is observed to be falling with an acceleration of 5.6 m/s². What is the magnitude and direction (a positive answer is up; a negative answer is down) of the net force on the rock? Enter your answer to 3 significant figures with units and sign._Enter your answer here_ What is the magnitude and direction of the gravitational force on the rock? Enter your answer to 3 significant figures with units and sign._Enter your answer here_What is the magnitude of the force of air resistance acting upon the rock at this instant? Enter your answer to 3 significant figures with units and sign._Enter your answer here_**E17.** A 1.1-kg book rests on a table. A downward force of 1.05 N is exerted on the top of the book by a hand pushing down on the book. Enter your answer to 3 significant figures with units.What is the total force on the book?_Enter your answer here_What is the magnitude of the gravitational force acting upon the book? Enter your answer to 3 significant figures with units._Enter your answer here_What is the magnitude of the upward (normal) force exerted by the table on the book? (Is the book accelerated?) Enter your answer to 3 significant figures with units._Enter your answer here_

(b) To find magnitude and direction of gravitational force Fg=mgFg=14.5×9.8Fg=142.1 N Direction is…

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E16.At a given instant in time, a 14.5-kg rock is observed to be falling with an acceleration of 5.6 m/s2.