Studied by 10 people
Define Force
The rate of change of momentum
Define the moment of a force
force x perpendicular distance (of line of action of force to the point)
State the principle of conservation of momentum
total momentum before a collision = total momentum after & if no resultant external force/ for an isolated system
Define momentum
The mass of a body times its velocity
Define velocity
Change in displacement / time taken.
Define the centre of gravity
The point at which the whole weight of the body may be considered to act
Define the centre of mass
The point at which the whole mass of the body maybe considered to act
Define work done
The force multiplied by the displacement in the direction of the force.
Define power
Work done per unit time.
State what is meant by the mass of a body
Mass is the quantity of matter
State Newton’s 2nd Law
(resultant) force proportional to rate of change of momentum
