Ch 08: Conservation of EnergyWorksheetSee all chapters
All Chapters
Ch 01: Units & Vectors
Ch 02: 1D Motion (Kinematics)
Ch 03: 2D Motion (Projectile Motion)
Ch 04: Intro to Forces (Dynamics)
Ch 05: Friction, Inclines, Systems
Ch 06: Centripetal Forces & Gravitation
Ch 07: Work & Energy
Ch 08: Conservation of Energy
Ch 09: Momentum & Impulse
Ch 10: Rotational Kinematics
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Ch 12: Torque & Rotational Dynamics
Ch 13: Rotational Equilibrium
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Ch 18: Heat and Temperature
Ch 19: Kinetic Theory of Ideal Gasses
Ch 20: The First Law of Thermodynamics
Ch 21: The Second Law of Thermodynamics
Ch 22: Electric Force & Field; Gauss' Law
Ch 23: Electric Potential
Ch 24: Capacitors & Dielectrics
Ch 25: Resistors & DC Circuits
Ch 26: Magnetic Fields and Forces
Ch 27: Sources of Magnetic Field
Ch 28: Induction and Inductance
Ch 29: Alternating Current
Ch 30: Electromagnetic Waves
Ch 31: Geometric Optics
Ch 32: Wave Optics
Ch 34: Special Relativity
Ch 35: Particle-Wave Duality
Ch 36: Atomic Structure
Ch 37: Nuclear Physics
Ch 38: Quantum Mechanics

Solution: A particle in has a mass of 100 g.What minimum speed does the particle need at point A to reach point B?What minimum speed does the particle need at point B to reach point A?

Problem

A particle in The graph shows potential energy as a function of distance. Distance is measured on the x-axis. Potential energy is measured from 0 to 5 joules on the y-axis. Two points are marked on the x-axis and are successively labelled as A and B. Point A is at the origin. Potential energy smoothly rises from 2 joules at A to 5 joules at the middle distance between the points. Then, it smoothly drops to 0 joules at B. has a mass of 100 g.

What minimum speed does the particle need at point A to reach point B?

What minimum speed does the particle need at point B to reach point A?