1
1 The diagram shows two children sitting on a see-saw.
(not to scale)
The weight of child A is 125 N.
Calculate the mass of child A. Include the unit in your answer.
mass of child A = ................................... unit .............. [3]
[Total: 3]
2 The diagram shows a uniform rod of wood suspended from a pivot.
, 2
(not to scale)
The rod is held stationary by a horizontal force F acting as shown.
The mass of the rod is 0.080 kg.
(a) Calculate the weight W of the rod.
weight = .............................................. [1]
(b) Calculate the moment of W about the pivot.
moment = .............................................. [2]
(c) Calculate the moment of F about the pivot.
moment = .............................................. [1]
(d) Calculate the force F.
force = .............................................. [2]
[Total: 6]
1 The diagram shows two children sitting on a see-saw.
(not to scale)
The weight of child A is 125 N.
Calculate the mass of child A. Include the unit in your answer.
mass of child A = ................................... unit .............. [3]
[Total: 3]
2 The diagram shows a uniform rod of wood suspended from a pivot.
, 2
(not to scale)
The rod is held stationary by a horizontal force F acting as shown.
The mass of the rod is 0.080 kg.
(a) Calculate the weight W of the rod.
weight = .............................................. [1]
(b) Calculate the moment of W about the pivot.
moment = .............................................. [2]
(c) Calculate the moment of F about the pivot.
moment = .............................................. [1]
(d) Calculate the force F.
force = .............................................. [2]
[Total: 6]
