Topics that will most likely appear on your LEOCT Physics Review Topics that will most likely appear on your LEOCT

Key Concepts Vectors Force and Force diagrams Sound travel Mass vs Weight Newton's Laws of Motion Doppler Effect Distance and displacement KE vs. PE and ME Ohm’s Law Speed, Velocity and Acceleration Collisions Inelastic and Elastic Power Graphs of Velocity and Acceleration Impulse and change in momentum Resistance: Parallel and Series Generators Gravity and how it relates to projectiles Refection and Refraction Right hand rule Types of Mirrors Electric charges Conditions in a vacuum Speed of Light Centripetal force Projectile motion Electromagnetic spectrum

Calculations Displacement Projectiles Ohm’s Law Speed Momentum Power Velocity Impulse Resistance Acceleration Collisions Total Resistance Force KE and PE Current Force at an Angle ME Potential Difference Net Force Wave speed Weight Frequency Work Wavelength

Practice Question 1 Draw the two rays that would be seen as the incident ray goes into the water.

Practice Question 2 A ball rolls down an inclined plane. After 1 second what fraction of its original potential energy remains? Time Elapsed (s) Distance Traveled (cm) 1 5 2 20 3 45 4 80

Practice Question 3

Force at an angle

Practice Question 4 A child is pulling a sled across a stretch of level ice. The rope makes an angle θ = 23° with the horizontal, the sled has a mass of 16 kg . If the sled is accelerating at a rate of 0.018 m/s2, what is the magnitude of the force applied by the child?

Concepts that were not covered good enough Centripetal force and motion Fusion and Fission Friction Isotopes Magnetic field Resistance in a Wire Mirrors Electrostatic Interactions Nuclear Energy Specific Heat

Concave Mirrors

Nuclear Energy: Fusion vs Fission Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.

Isotopes Isotopes are variants of a particular chemical element which differ in neutron number. All isotopes of a given element have the same number of protons in each atom.

Resistance in a Wire To calculate the resistance R of a wire, we need to know three things: its length – the longer the wire, the greater its resistance. its cross-sectional area A – the greater the area, the less its resistance. the resistivity of the material r – the greater the resistivity, the greater its resistance.

Electrostatic Interactions Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge