Types Of Forces P2 Flashcards
Momentum
Mass x velocity
Impulse (change in momentum )
mv-mu
Net force (rate of change in momentum)
Impulse/ time
Law of conservation of momentum
Total initial momentum remains equal to the total final momentum of an isolated system.
m1u1+m2u2=m1v1+m2v2
Law of conservation of energy
Energy cannot be created or destroyed by itself. But it can change forms; it can change forms from one type to another.
Kinetic energy
The energy present in a body due to its motion.
1/2 mv square
Potential energy
The energy present in a body due to its position
Gravitational potential energy
The energy present in a body due to it’s height
GPE=mgh
Elastic Potential energy
The energy present in a body due to its deformation
Chemical potential energy
The energy present in a body due to the oxidation of its atoms.
Work
W=force x distance
Power
Defined as the rate of doing work
Work/time
F x velocity
Energy/ time
Efficiency
The ratio of useful output to the total input (energy/power)
Useful power/ total input
Pressure
The force acting normally* per unit area * normal= perpendicular
Force/area
Pressure in liquids
Density x depth x gravitational field strength
