1
1 The diagram shows a uniform rod of wood suspended from a pivot.
(not to scale)
The rod is held stationary by a horizontal force F acting as shown.
The angle between the rod and the vertical is increased.
State whether the force F needed to hold the rod stationary must be increased, decreased or stay
the same.
Explain your answer.
..................................................................................................................................................
..................................................................................................................................................
..................................................................................................................................................
.................................................................................................................................................. [2]
[Total: 2]
, 2
2 A metre rule is balanced on a pivot by three vertical forces, as shown in the diagram.
The moment of the 5.0 N force about the pivot is 200 N cm.
Calculate the size of force F.
F = .............................................. N [4]
[Total: 4]
1 The diagram shows a uniform rod of wood suspended from a pivot.
(not to scale)
The rod is held stationary by a horizontal force F acting as shown.
The angle between the rod and the vertical is increased.
State whether the force F needed to hold the rod stationary must be increased, decreased or stay
the same.
Explain your answer.
..................................................................................................................................................
..................................................................................................................................................
..................................................................................................................................................
.................................................................................................................................................. [2]
[Total: 2]
, 2
2 A metre rule is balanced on a pivot by three vertical forces, as shown in the diagram.
The moment of the 5.0 N force about the pivot is 200 N cm.
Calculate the size of force F.
F = .............................................. N [4]
[Total: 4]
