Dynamics Flashcards
Newtons first law is otherwise known as…
The law of inertia
Newtons 1st law states
A body will remain at rest or a constant state of motion unless acted on by an external force
Newtons 2nd law states…
The rate of change of momentum of a body is proportional to the applied force and takes place in the direction of the force
Newtons 3rd law states…
Every action has an equal and opposite reaction
Define weight
Weight is the gravitational pull of the earth on a body
Define power
Power is the amount of work done over a given time
The equation for power
Power = work done / time
Potential energy equation
P.E = mass x gravity x height
Kinetic Energy Equation
K.E = 0.5 x mass x velocity ^2
Momentum equation
Momentum = mass x velocity
Conservation of momentum equation
mu (1) + mu (2) = mv (1) + mv (2)
What are the two types of collision?
Elastic and Inelastic
What is elastic collision?
When the objects move in OPPOSITE directions after the collision
What is inelastic collision?
When the objects move together in the same direction after collision
Equation for Elastic Collision
m(1)u(1) + m(2)u(2) = m(1)v(1) + m(2)v(2)
