H203 Dynamics Flashcards
(15 cards)
What is Newton’s First Law?
Newton’s First Law states that an object continues to be in its state of rest or in motion with a constant velocity unless acted upon by a resultant force.
What is Newton’s Second Law?
Newton’s Second Law states that the rate of change of momentum of a body is directly proportional to the resultant force acting on it and takes place in the direction of the resultant force.
Force is defined as rate of change of momentum
What is Newton’s Third Law?
Newton’s Third Law states that when Body A exerts a force on Body B, the force exerted on Body A by Body B is equal in magnitude. Both forces are in opposite directions and are of the same kind.
Define mass of a body.
The mass of a body is the property of a body which resists change in motion.
Define weight of a body.
The weight of a body is the force acting on it due to a gravitational field.
Define linear momentum
Linear momentum of a body is defined as the product of its mass and its velocity.
What is the formula of the net force of a constant flowing mass?
F net = mass/time(change in velocity)
Define impulse.
Impulse is defined as the product of the force and the time duration of the impact.
State the principle of conservation of linear momentum.
The Principle of Conservation of Linear Momentum states that the total linear momentum of a system remains constant provided that no resultant external force acts on the system.
State the formula for Principle of Coservation of Linear Momentum.
m1u1 +m2u2 = m1v1 + m2v2
Define elastic collison.
An elastic collision is a collision in which the total kinetic energy of the colliding bodies is conserved.
State the formula for an elastic collision between two objects.
1/2m1u1^2 + 1/2m2u2^2 = 1/2m1v1^2 +1/2m2v2^2
u1-u2=v2-v1
Define inelastic collision.
An inelastic collision is a collision where kinetic energy is not conserved.
Define perfectly inelastic collision.
A perfectly inelastic collision is a collision where the colliding bodies will coalesce with one another and move off with the same velocity.
State the formula for a perfectly inelastic collision.
m1u1 +m2u2 = (m1+m2)v
