hw7 - kveton (ajk643) hw7 morrison (60620) 1 This print-out...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: kveton (ajk643) hw7 morrison (60620) 1 This print-out should have 22 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A car is moving at 71 miles per hour. The kinetic energy of that car is 5 10 5 J. How much energy does the same car have when it moves at 111 miles per hour? Answer in units of J. 002 10.0 points Calculate the speed of an 7 . 10 4 kg airliner with a kinetic energy of 1 . 3 10 9 J. Answer in units of m / s. 003 10.0 points The Joule and the kilowatt-hour are both units of energy. 9 . 9 kW h is equivalent to how many Joules? Answer in units of J. 004 10.0 points If you exert a force of 20 N to lift a box a distance of 0 . 83 m, how much work do you do? Answer in units of J. 005 10.0 points A block moves to the right in the positive x- direction through the displacement x while under the influence of a force with the same magnitude F . Which of the following is the correct order of the amount of work done by force F , from most positive to most negative? (a) vector F (b) vector F (c) vector F (d) vector F 1. c, a, b, d 2. c, a, d, b 3. a, b, c, d 4. d, c, a, b 5. d, a, b, c 6. a, d, b, c 7. a, c, b, d 006 10.0 points A skier of mass 70.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 63.0 m up a 30.0 slope (assumed to be fric- tionless) at a constant speed of 2.0 m/s? The acceleration of gravity is 9 . 81 m / s 2 ....
View Full Document

Page1 / 4

hw7 - kveton (ajk643) hw7 morrison (60620) 1 This print-out...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online