Newtons Laws BARNES Flashcards
1
Q
An object is in equilibrium if
A
the resultant force (sum of forces) acting on it is zero
2
Q
Inextensible
A
string/rod does not stretch (so tension is constant throughout)
3
Q
Particle
A
dimensionless object
4
Q
Equilibrium means
A
the object is either at rest or moving at a constant velocity
5
Q
If a non-zero resultant force acts on a body of mass m, then its acceleration, a, is given by
A
Sum of F = ma
6
Q
Weight =
A
mg
7
Q
N2
A
= up
8
Q
N1 =
A
Horizontal
9
Q
If object A exerts a force on object B, then B exerts
A
an equal and opposite force on A
10
Q
Normal contact force acts on an object due to
A
contact with a surface/other object - always perpendicular to and away from the surface
