College Physics For Ap® Courses
16th Edition
ISBN: 9781938168932
Author: Gregg Wolfe, Irina Lyublinskaya, Douglas Ingram
Publisher: OpenStax
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Textbook Question
Chapter 8, Problem 9PE
A person slaps her leg with her hand, bringing her hand to rest in 2.50 milliseconds from an initial speed of 4.00 m/s. (a) What is the average force exerted on the leg, taking the effective mass of the hand and forearm to be 1.50 kg? (b) Would the force be any different if the woman clapped her hands together at the same speed and brought them to rest in the same time? Explain why or why not.
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An office worker smacks a table, bringing his hand to rest in 0.0025 seconds from an initial speed of
4.00 m/s. How much force is exerted on the table, taking the effective mass of his forearm and
hand to be 1.5 kg?
(Answer in 1 decimal place, in kilo-newtons, no unit)
UNIT: kN
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An arrow, starting from rest, leaves the bow with a speed of 21.0 m/s. If the average force exerted on the arrow by the bow were tripled, all else remaining the same, with what speed would the arrow leave the bow?
Two objects (m, = 4.70 kg and m, = 3.05 kg) are connected by a light string passing over a light, frictionless pulley as in the figure below. The 4.70-kg object is released from rest at a
point h = 4.00 m above the table.
(a) Determine the speed of each object when the two pass each other.
m/s
(b) Determine the speed of each object at the moment the 4.70-kg object hits the table.
m/s
(c) How much higher does the 3.05-kg object travel after the 4.70-kg object hits the table?
Chapter 8 Solutions
College Physics For Ap® Courses
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