IB DP Physics: SL复习笔记2.4.4 Collisions & Explosions
Collisions & Explosions In both collisions and explosions, momentum is always conserved However, kinetic energy might not always be A collision (or explosion) is either: Elastic – if the kineti...
IB DP Physics: SL复习笔记2.4.3 Conservation of Linear Momentum
Conservation of Linear Momentum The principle of conservation of linear momentum states: The total momentum before a collision = the total momentum after a collision provided no external force acts...
IB DP Physics: SL复习笔记2.4.2 Impulse
Impulse The force and momentum equation can be rearranged to find the impulse Impulse, I, is equal to the change in momentum: I = FΔt = Δp = mv – mu Where: I = impulse (N s) F = force (N) t = time ...
IB DP Physics: SL复习笔记2.4.1 Force & Momentum
Force & Momentum Linear momentum, p, is defined as the product of mass and velocity Momentum is a vector quantity - it has both a magnitude and a direction This means it can have a negative or ...
IB DP Physics: SL复习笔记2.3.7 Efficiency
Efficiency The efficiency of a system is a measure of how well energy is transferred in a system Efficiency is defined as: The ratio of the useful power or energy transfer output from a system to i...
IB DP Physics: SL复习笔记2.3.6 Principle of Conservation of Energy
Principle of Conservation of Energy The Principle of Conservation of Energy states that: Energy cannot be created or destroyed, it can only be transferred from one form to another This means the to...
IB DP Physics: SL复习笔记2.3.5 Power
Power The power of a mechanical process is the rate at which energy is transferred Since work done is equal to the energy transferred, power can also be defined as the rate of doing work or the wor...
IB DP Physics: SL复习笔记2.3.4 Work Done
Work Done Work is defined as The amount of energy transferred when an external force causes an object to move over a certain distance If the force is parallel to the direction of the object's displ...
IB DP Physics: SL复习笔记2.3.3 Elastic Potential Energy
Elastic Potential Energy Elastic potential energy is defined as The energy stored within a material (e.g. in a spring) when it is stretched or compressed It can be found from the area under the for...
