Booklet 4: Forces in Action- Dynamics Flashcards
1
Q
Newton’s First Law
A
an object will remain at rest or uniform motion unless it is acted on by an external force
2
Q
Newton’s Second Law
A
force is proportional to the rate of change of linear momentum in the direction of the force
3
Q
Newton
A
the force required to accelerate 1kg by 1ms^-2 in the direction of the force
4
Q
Centre of Gravity (Centre of Mass)
A
the point on an object where all of its weight appears to act
5
Q
Drag Proportionality
A
Drag ∝ Area
Drag ∝ Speed^2
double the speed, quadruple the drag
6
Q
Weight
A
force acting on an object due to gravity
7
Q
Terminal Velocity
A
the constant speed reached after the drag forces in the fluid balance out the other force(s)
