Per6_exercise - Solutions to Period 6 Exercises E.1 The...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Solutions to Period 6 Exercises E.1 The potential energy of a body near the Earth a) increases as the mass of the body increases. b) is increased if the body is raised. c) is increased when the body is dropped. d) is decreased if the shape of the body is changed, but the center of mass remains in the same position. e) is correctly described by both a. and b. above. From the equation, E pot = M g h the gravitational potential energy stored in a raised object is directly proportional to the height it is raised and to the mass of the object. E.1 = e 6- Ex 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
E.2 In which of the following cases is the most work done against the force of gravity on the object moved? (Neglect friction) a) A woman carries a 5 pound box of tools to the top of a building 600 feet high. W = M g h = 5 lbs x 600 ft = 3,000 ft-lbs b) A hoist lifts a 4000 pound automobile vertically a distance of ½ of a foot. W = M g h = 4,000 lbs x 0.5 ft = 2,000 ft-lbs c) Gravity acts on a 2 pound stone as it falls a distance of 200 feet. In this case, the force of gravity does
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 7

Per6_exercise - Solutions to Period 6 Exercises E.1 The...

This preview shows document pages 1 - 3. Sign up to view the full document.

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