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10. Conservation of Energy

Intro to Energy Types

10. Conservation of Energy

Intro to Energy Types

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Intro to Energy Types

Intro to Energy Types

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Anderson Video - Energy

Anderson Video - Energy

Physics - Energy - Types of Energy

Physics - Energy - Types of Energy

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Kinetic Energy and Potential Energy

Kinetic Energy and Potential Energy

Professor Dave Explains

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Textbook Question

A slingshot will shoot a 10-g pebble 22.0 m straight up. (b) With the same potential energy stored in the rubber band, how high can the slingshot shoot a 25-g pebble? (c) What physical effects did you ignore in solving this problem?

Textbook Question

Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 20 m that makes an angle of 45° with the vertical, steps off his tree limb, and swings down and then up to Jane's open arms. When he arrives, his vine makes an angle of 30° with the vertical. Determine whether he gives her a tender embrace or knocks her off her limb by calculating Tarzan's speed just before he reaches Jane. Ignore air resistance and the mass of the vine.

Textbook Question

The maximum height a typical human can jump from a crouched start is about 60 cm. By how much does the gravitational potential energy increase for a 72-kg person in such a jump? Where does this energy come from?

Textbook Question

A slingshot will shoot a 10-g pebble 22.0 m straight up. (a) How much potential energy is stored in the slingshot's rubber band?

Textbook Question

A 100 g particle experiences the one-dimensional, conservative force Fx shown in FIGURE P10.60. a. Let the zero of potential energy be at x=0 m . What is the potential energy at x=1.0, 2.0, 3.0, and 4.0 m? Hint: Use the definition of potential energy and the geometric interpretation of work.

Textbook Question

A particle moves from A to D in FIGURE EX10.36 while experiencing force F = (6i + 8j) N. How much work does the force do if the particle follows path. (b) ACD. Is this a conservative force? Explain.

Textbook Question

A 100 g particle experiences the one-dimensional, conservative force Fx shown in FIGURE P10.60. b. Suppose the particle is shot to the right from x=1.0 m with a speed of 25 m/s. Where is its turning point?

Textbook Question

(a) Suppose we have three masses, m₁ , m₂ and m₃,that initially are extremely (≈ infinitely) far apart from each other. The work needed to bring them to the positions shown in Fig. 8–50 is

W = - G ((m₁m₂/ r₁₂) + (m₁m₃/r₁₃) + (m₂m₃/r₂₃)) .

(c) Is W equal to the binding energy of the system—that is, is W equal to the energy required to separate the components by an infinite distance? Explain.

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Textbook Question

The allowed energies of a simple atom are 0.00 eV, 4.00 eV, and 6.00 eV. c. What wavelengths appear in the atom’s absorption spectrum?

Textbook Question

The absorption spectrum of an atom consists of the wavelengths 200 nm, 300 nm, and 500 nm. b. What wavelengths are seen in the atom’s emission spectrum?

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