Force is a vector quantity. State three other vector quantities.
Three coplanar forces X, Y and Z act on an object, as shown in the figure below
The force Z is vertical and X is horizontal. The force Y is at an angle θ to the horizontal. The force Z is kept constant at 
.
In an experiment, the magnitude of force X is varied. The magnitude and direction of force Y are adjusted so that the object remains in equilibrium.
The figure below shows the variation of the magnitude of force Y with the magnitude of force X.
Use the Figure to estimate the magnitude of Y for 
.
State and explain the value of θ for .
The magnitude of X is increased to 
. Use the resolution of forces to calculate the value of
angle θ
the magnitude of force Y
The angle θ decreases as X increases. Explain why the object cannot be in equilibrium for 
.
when 
is 
.
.
.
