Available Answers

1. 1.

   Define moment of a force. Write its SI unit.

2. 2.

   It is easier to open a door by applying the force at its handle than at hinged end. Why?

3. 3.

   Write any two applications of moment of force.

4. 4.

   A nut is opened by a spanner of length 30 cm. If the applied force 20 N, find the moment of force needed to loosen the nut.

5. 5.

   A force of 250 N produces a moment of force of 500 N m. Calculate the moment arm.

6. 6.

   Calculate the force which will produce a moment of 60 N m when the perpendicular distance between the point of application of force and the fixed point is 60 cm.