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# Exam 1 - Physics 171.101 First Exam Oct 11 2005 As a...

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Fig. 1 Physics 171.101 First Exam Oct. 11, 2005 As a reminder that we are striving to establish a culture of integrity at JHU, please sign the following statement and return this with your blue book. The exam will be posted on our class web site after all exams have been taken. I agree to complete this exam without unauthorized assistance from any person, materials, or device. Signature___________________ Date ___________________ Begin with problems that look most familiar. If you get stuck, skip to the next problem. 1. (10 pts) A block of mass m =2.0 kg is dropped from height h =50cm onto a spring of spring constant k = 2000 N/m, as shown in Fig. 1. Find the maximum distance the spring is compressed. 2. (12 pts) An elevator cab that weighs 27.8 kN moves upward. What is the tension in the cable if the cab's speed is (a) increasing at a rate of 1.22 m/s 2 and (b) decreasing at a rate of 1.22 m/s 2 ? 3. 12 pts) A helicopter lifts a 60 kg astronaut 20 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/5. How much work is done on the astronaut by (a) the force from the helicopter and (b) the gravitational force on her?

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Exam 1 - Physics 171.101 First Exam Oct 11 2005 As a...

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