Edexcel A Level Physics:復(fù)習(xí)筆記2.18 Kinetic Energy
Kinetic Energy Kinetic energy (usually written?Ek?and sometimes KE) is the energy an object has due to its?motion?(or velocity) The faster an object moves, the greater its kinetic energy &nb...
Edexcel A Level Physics:復(fù)習(xí)筆記2.17 Work
Work 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 dis...
Edexcel A Level Physics:復(fù)習(xí)筆記2.16 Centre of Gravity & The Principle of Moments
Centre of Gravity The centre of gravity (sometimes called the centre of mass) of an object is?the point through which all the weight can be considered to act The position of the centre of gr...
Edexcel A Level Physics:復(fù)習(xí)筆記2.15 Moments
Calculating the Moment of a Force A moment is the?turning effect of a force Moments occur when forces cause objects to?rotate?about some pivot The moment of a force is given by Moment (N m) ...
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Edexcel A Level Physics:復(fù)習(xí)筆記2.14 Conservation of Linear Momentum
The Principle of Conservation of Linear Momentum The principle of conservation of momentum states that in a?closed system, the total momentum before an event is equal to the total momentum after th...
Edexcel A Level Physics:復(fù)習(xí)筆記2.13 Momentum
Defining Momentum Linear momentum (p) is defined as the product of mass and velocity Momentum is the product of mass and velocity Momentum is a vector quantity - it has both a magnitu...
