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14. A parachutist jumps out of a plane and falls freely for the first 50 m of the decent. The parachute then opens, which serves to decelerate the fall at a rate of 2.0 m/s. When the jumper hits the ground, their speed is 3.0 m/s. a) How long did the parachutist spend in the air? b) From what height did the parachutist jump? Answers: a) 17.4 s b) 293 m

14. A parachutist jumps out of a plane and falls freely for the first 50 m of the decent. The parachute then opens, which serves to decelerate the fall at a rate of 2.0 m/s. When the jumper hits the ground, their speed is 3.0 m/s. a) How long did the parachutist spend in the air? b) From what height did the parachutist jump? Answers: a) 17.4 s b) 293 m

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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**Transcription of Educational Text on Motion** --- **Answers: a) 3.19 m, b) 1.52** 11. A man with a stopwatch stands perfectly still from \( t = 0 \) to \( t = 5.00 \, \text{min} \). From \( t = 5.00 \, \text{min} \) to \( t = 10.00 \, \text{min} \), he walks straight ahead at a speed of \( 2.20 \, \text{m/s} \). What is his average velocity and average acceleration during the following time intervals: a) 2.00 min to 8.00 min b) 3.00 min to 9.00 min c) Sketch graphs of \( v \) vs. \( t \), and \( v \) vs. \( t \). Indicate how the answers to parts a and b may be obtained from the graphs. *Answers:* a) \( 0.611 \times 10^{-3} \, \text{m/s}^2 \), b) 1.47 m/s 12. A muon enters an electric field at a speed of \( 5 \times 10^6 \, \text{m/s} \). The electric field slows it uniformly at a rate of \( 1.25 \times 10^{14} \, \text{m/s}^2 \). How far does the muon travel before it stops? *Answer:* 0.100 m 13. A woman once fell 144 feet from the top of a building onto a metal ventilator box. She crushed the box to a depth of 18 inches and survived the fall without any serious injury. a) What was her velocity just before hitting the box? b) What acceleration did she experience during the collision with the box? Express this acceleration in units of \( g \) (as a multiple of \( g \)). *Answers:* a) \( -29.3 \, \text{m/s} \), b) 95.5 \( g \) 14. A parachutist jumps out of a plane and falls freely for the first 50 m of the descent. The parachute then opens, which serves to decelerate the fall at a rate of \( 2.0 \, \
Transcribed Image Text:**Transcription of Educational Text on Motion** --- **Answers: a) 3.19 m, b) 1.52** 11. A man with a stopwatch stands perfectly still from \( t = 0 \) to \( t = 5.00 \, \text{min} \). From \( t = 5.00 \, \text{min} \) to \( t = 10.00 \, \text{min} \), he walks straight ahead at a speed of \( 2.20 \, \text{m/s} \). What is his average velocity and average acceleration during the following time intervals: a) 2.00 min to 8.00 min b) 3.00 min to 9.00 min c) Sketch graphs of \( v \) vs. \( t \), and \( v \) vs. \( t \). Indicate how the answers to parts a and b may be obtained from the graphs. *Answers:* a) \( 0.611 \times 10^{-3} \, \text{m/s}^2 \), b) 1.47 m/s 12. A muon enters an electric field at a speed of \( 5 \times 10^6 \, \text{m/s} \). The electric field slows it uniformly at a rate of \( 1.25 \times 10^{14} \, \text{m/s}^2 \). How far does the muon travel before it stops? *Answer:* 0.100 m 13. A woman once fell 144 feet from the top of a building onto a metal ventilator box. She crushed the box to a depth of 18 inches and survived the fall without any serious injury. a) What was her velocity just before hitting the box? b) What acceleration did she experience during the collision with the box? Express this acceleration in units of \( g \) (as a multiple of \( g \)). *Answers:* a) \( -29.3 \, \text{m/s} \), b) 95.5 \( g \) 14. A parachutist jumps out of a plane and falls freely for the first 50 m of the descent. The parachute then opens, which serves to decelerate the fall at a rate of \( 2.0 \, \
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