Activity 4
a body said to be equilibrium or at rest with respect to a certain reference, then the
sum of forces acting on this body is null
consider a ball of mass m = 2kg that is joined to the
free end of a thread while the other
end is fixed to a support as shown in the
ked to a support as shown in the given diagram where the ball is at rest with
respect to earth, use g = 10 n/kg.
a) list the forces acting on the ball.
b) classify these forces as contact forces and forces acting at a distance.
c) give the directions of these forces.
a) explain why these forces are opposite (same magnitude and line of action but opposite directions)
'''
e) write the vector relation between these forces.
.
.
.
.
.
.
.
.
.
.
.
.
f) deduce the magnitude of these forces.
..
..