Advertisements
Advertisements
प्रश्न
Calculate the length of arm of couple, if a force of 13 N produces a moment of couple of 14.3 Nm.
Advertisements
उत्तर
Moment of couple = Force × Arm of couple
14.3 Nm = 13 N × Arm of couple
Arm of couple = `14.3/13`
= 1.1 m.
संबंधित प्रश्न
A nut is opened by a wrench of length 20 cm. If the least force required is 2N, find the moment of force needed to loosen the nut.
Match the column
| Column A | Column B |
| (a) Camel | (1) broad and deep foundation |
| (b) Truck | (2) broad feet |
| (c) Knife | (3) six or eight tyres |
| (d) High building | (4) sharp cutting edge |
| (e) Thrust | (5) atm |
| (f) Moment of force | (6) N |
| (g) Atmospheric pressure | (7) N m |
A potter turns his wheel by applying a force through the stick near the rim of wheel.
The moment of a force of 25 N about a point is 2.5 N m. Find the perpendicular distance of force from that point.
A rocket is moving at a constant speed in space by burning its fuel and ejecting out the burnt gases through a nozzle. Answer the following
1) Is there any change in the momentum of the rocket? if yes, what causes the change in momentum?
2) Is there any force acting on the rocket? if yes, how much?
A spanner (or wrench) has a long handle. Why?
What is the work done when no net force is applied on the body?
A wheel of diameter 3 m is shown in fig. 2 with axle at 0. A force F = 8 N is applied at Q in the direction shown in figure. Calculate the moment of force about:
(i) centre o, and
(ii) point p.

State the units of moment of force.
A uniform metre scale is balanced at a 40 cm mark when weights of 20 gf and 5 gf are suspended at 5 cm mark and 75 cm mark respectively. Calculate the weight of metre scale.
