FUNDAMENTALS OF PHYSICS - EXTENDED
12th Edition
ISBN: 9781119773511
Author: Halliday
Publisher: WILEY
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Chapter 5, Problem 72P
Block and three cords. In Fig. 5.43, a block B of mass
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A bobsled starts at the top of a track as human runners sprint from rest and then jump into the sled. Assume they reach 40 km/h from rest after covering a distance of 50 m over flat ice. a. How much work do they do on themselves and the sled which they are pushing given the fact that there are two men of combined mass 185 kg and the sled with a mass of 200 kg? (If you haven't seen bobsledding, watch youtube to understand better what's going on.) b. After this start, the team races down the track and descends vertically by 200 m. At the finish line the sled crosses with a speed of 55 m/s. How much energy was lost to drag and friction along the way down after the men were in the sled?
Chapter 5 Solutions
FUNDAMENTALS OF PHYSICS - EXTENDED
Ch. 5 - At time t = 0, constant F begins to act on a rock...Ch. 5 - A vertical force F is applied to a block of mass m...Ch. 5 - Only two horizontal forces act on a 3.0 kg body...Ch. 5 - Two horizontal forces act on a 2.0 kg chopping...Ch. 5 - If the 1 kg standard body has an acceleration of...Ch. 5 - While two forces act on it, a particle is to move...Ch. 5 - A 2.00 kg object is subjected to three forces that...Ch. 5 - A 0.340 kg particle moves in an xy plane according...Ch. 5 - GO A 0.150 kg particle moves along an x axis...Ch. 5 - A 2.0 kg particle moves along an x axis, being...
Ch. 5 - A block with a weight of 3.0 N is at rest on a...Ch. 5 - SSM A 500 kg rocket sled can be accelerated at a...Ch. 5 - A car traveling at 53 km/h hits a bridge abutment....Ch. 5 - A customer sits in an amusement park ride in which...Ch. 5 - Tarzan, who weighs 820 N, swings from a cliff at...Ch. 5 - Sunjamming. A sun yacht is a spacecraft with a...Ch. 5 - The tension at which a fishing line snaps is...Ch. 5 - SSM An electron with a speed of 1.2 107 m/s moves...Ch. 5 - A car that weighs 1.30 104 N is initially moving...Ch. 5 - A firefighter who weighs 712 N slides down a...Ch. 5 - The high-speed winds around a tornado can drive...Ch. 5 - SSM WWW A block is projected up a frictionless...Ch. 5 - An elevator cab and its load have a combined mass...Ch. 5 - The velocity of a 3.00 kg particle is given by...Ch. 5 - Holding on to a towrope moving parallel to a...Ch. 5 - A 40 kg girl and an 8.4 kg sled are on the...Ch. 5 - A 40 kg skier skis directly down a frictionless...Ch. 5 - ILW A sphere of mass 3.0 104 kg is suspended from...Ch. 5 - Using a rope that will snap if the tension in it...Ch. 5 - A lamp hangs vertically from a cord in a de...Ch. 5 - An elevator cab that weighs 27.8 kN moves upward....Ch. 5 - An elevator cab is pulled upward by a cable. The...Ch. 5 - GO The Zacchini family was renowned for their...Ch. 5 - An 85 kg man lowers himself to the ground from a...Ch. 5 - SSM ILW A hot-air balloon of mass M is descending...Ch. 5 - In shot putting, many athletes elect to launch the...Ch. 5 - A shot putter launches a 7.260 kg shot by pushing...Ch. 5 - An 80 kg man drops to a concrete patio from a...Ch. 5 - Rocket thrust. A rocket and its payload have a...Ch. 5 - Block and three cords. In Fig. 5.43, a block B of...Ch. 5 - Forces stick−block. In Fig. 5.44, a 33 kg block...Ch. 5 - Lifting cable danger. Cranes are used to lift...Ch. 5 - Prob. 75PCh. 5 - Prob. 76PCh. 5 - Prob. 77PCh. 5 - Prob. 78PCh. 5 - Prob. 79PCh. 5 - Prob. 80PCh. 5 - Prob. 81PCh. 5 - Prob. 82PCh. 5 - Prob. 83PCh. 5 - Prob. 84P
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