dynamics Flashcards
Newton’s first law
Every object continues in its state of rest or constant speed unless a net external forces acts on it to change that state
Law of inertia
Mass is the property of a body which resists change in motion
Newton’s third law
When body A exerts a force on body B, body B exerts a force of the same type that is equal in magnitude and opposite in direction on body A
newton’s second law
The rate of change of momentum of a body is proportional to the net force acting on it, and this rate of change of momentum takes place in the direction of the net force
what does the area below a force time graph represent
change in momentum
def of Impulse
Impulse of force I is defined as the product of the force and the time during which it acts
Formula for impulse
I = F x change in time
what is a elastic collision
total kinetic energy is conserved
what is an inelastic / perfectly inelastic collision
total KE is not conserved, for perfectly inelastic the particles stick together after the collision
what is principle conservation of Linear momentum
For a system of interacting bodies, the total momentum of the bodies remains constant, provided no net external force acts on the system
what is Head on collision
Head -on collision means that both bodies will move along the same line joining their centres of masses before and after the collision
