Download Topic 6 Fields and Forces Name: The directives after the numbered

Topic 6
Fields and Forces
Name:
The directives after the numbered subtopics are IB Assessment statements and objectives
6.1 Gravitational force and field
6.1.1 State Newton’s universal law of gravitation
Point mass Equation(s) –
Know the relationship between the various variables in the equation.
6.1.2 Define gravitational field strength
6.1.3 Determine the gravitational field due to one or more point masses.
6.1.4 Derive an expression for gravitational field strength at the surface of a planet, assuming that all its
mass is concentrated in its centre.
6.1.5 Solve problems involving gravitational forces and fields. (From Physics Giancoli 2nd Ed. Ch. 4 #s
20, 21, & 25).
1. Calculate the force of gravity between two bowling balls each of which has a mass of 8.0 Kg when they
are 0.50 m apart (center to center).
2. Calculate the force of gravity on a spacecraft 12,8000 km above the earth’s surface if its mass is 700
kg.
3. A hypothetical planet has a radius of 1.6 times that of the earth, but has the same mass. What is the
acceleration due to gravity near its surface?
6.2 Elecric force and field
6.2.1 State that there are two types of electric charge.
How were they assigned?
6.2.2 State and apply the law of conservation of charge.
6.2.3 Describe and explain the difference in the electrical properties of conductors and insulators.
6.2.4 State Coulomb’s Law
Point charge –
6.2.5 Define electric field strength –
What is a test charge?
Formulae -
6.2.6 Determine the electric field strength due to one or more point charges.
6.2.7 Draw the electric field patterns for different charge configurations.
Point charge (+)
Point charge (-)
Oppositely charged parallel plates (incorporate the edge effect)
6.2.8 Solve problems involving electric charges, forces and fields.
Do Problems on P. 163 - 165
Charged sphere
6.3 Magnetic force and field
6.3.1 State that moving charges give rise to magnetic fields.
6.3.2 Draw magnetic field patterns due to currents.
Due to a straight wire:
Due to a flat circular coil:
Due to a solenoid:
6.3.3 Determine the direction of the force on a current-carrying conductor in a magnetic field.
State and draw an example of at least two rules for this:
6.3.4 Determine the direction of the force on a charge moving in a magnetic field.
Draw several examples:
6.3.5 Define the magnitude and direction of a magnetic field.
Equation(s) –
Know the relationship between the various variables in the equation.
6.3.6 Solve problems involving magnetic forces, fields and currents.
Do Problems P.170 - 171