9+Motion+in+Fields+unit

=9 MOTION IN FIELDS unit in IB PHYSICS=
 * 1 Measure || 2 Mech || 3 Therm || 4 Waves || 5 Electric || 6 Fields || 7 Atomic || 8 EPCC || 9 Motion in Fields || 10 Therm AHL || 11 Wave Phen || 12 EMI || 13 QNP || 14 Digital || OPT || PRAC || REVISE ||

Useful files
PRACTICE QUESTIONS

9.1 Projectile motion
9.1.1 State the independence of the vertical and the horizontal components of velocity for a projectile in a uniform field. 9.1.2 Describe and sketch the trajectory of projectile motion as parabolic in the absence of air resistance. Proof of the parabolic nature of the trajectory is not required. 9.1.3 Describe qualitatively the effect of air resistance on the trajectory of a projectile 9.1.4 Solve problems on projectile motion. Problems may involve projectiles launched horizontally or at any angle above or below the horizontal. Applying conservation of energy may provide a simpler solution to some problems than using projectile motion kinematics equations.

9.2 Gravitational field, potential and energy
9.2.1 Define gravitational potential and gravitational potential energy. Students should understand the scalar nature of gravitational potential and that the potential at infinity is taken as zero. Students should understand that the work done in moving a mass between two points in a gravitational field is independent of the path taken. 9.2.2 State and apply the expression for gravitational potential due to a point mass. 9.2.3 State and apply the formula relating gravitational field strength to gravitational potential gradient. 9.2.4 Determine the potential due to one or more point masses. 9.2.5 Describe and sketch the pattern of equipotential surfaces due to one and two point masses. 9.2.6 State the relation between equipotential surfaces and gravitational field lines. 9.2.7 Explain the concept of escape speed from a planet. 9.2.8 Derive an expression for the escape speed of an object from the surface of a planet. Students should appreciate the simplifying assumptions in this derivation. 9.2.9 Solve problems involving gravitational potential energy and gravitational potential.

9.3 Electric field, potential and energy
9.3.1 Define electric potential and electric potential energy. Students should understand the scalar nature of electric potential and that the potential at infinity is taken as zero. Students should understand that the work done in moving a point charge between two points in an electric field is independent of the path taken. 9.3.2 State and apply the expression for electric potential due to a point charge. 9.3.3 State and apply the formula relating electric field strength to electric potential gradient. 9.3.4 Determine the potential due to one or more point charges. 9.3.5 Describe and sketch the pattern of equipotential surfaces due to one and two point charges. 9.3.6 State the relation between equipotential surfaces and electric field lines. 9.3.7 Solve problems involving electric potential energy and electric potential.

9.4 Orbital motion
9.4.1 State that gravitation provides the centripetal force for circular orbital motion. 9.4.2 Derive Kepler’s third law. 9.4.3 Derive expressions for the kinetic energy, potential energy and total energy of an orbiting satellite. 9.4.4 Sketch graphs showing the variation with orbital radius of the kinetic energy, gravitational potential energy and total energy of a satellite. 9.4.5 Discuss the concept of “weightlessness” in orbital motion, in free fall and in deep space. 9.4.6 Solve problems involving orbital motion.

FIELDS IB PRACTICE QUESTIONS