Question

(a) Define 1N.
(b) What do you mean by moment of force ?
(c) Write two factors affecting liquid pressure ?
(d) How does pressure varies with change in force ?
(e) The moment of force about a fixed point of a rod of length 2m is 30Nm. What is the force
applied at its free end ?

Answer 1

Answer:

1) One newton is defined as the force that is required to accelerate a mass    of 1 kg by 1 m/s² in the direction of applied force.

2) Moment of force (often just moment) is a measure of its tendency to cause a body to rotate about a specific point of axis.

3)Two factors influence the pressure of liquids:-

• density of liquid.

• depth of liquid.

4) PRESSURE IS DIRECTLY PROPORTIONAL TO  CHANGE IN FORCE

5)  Given that moment of force is 10 N-m about a point O at a distance of 2m.

We know that moment of force is given by formula r × F.

          10 = 2 × F

            F = 5N

Hence 5N of force should be appplied  at a perpendicular distance of 2m.