Advertisements
Advertisements
Question
A uniform metre rule of weight 10gf is pivoted at its 0 mark.
What moment of force depresses the rule?
Advertisements
Solution
Anticlockwise moment = 10 gf x 50 cm = 500 gf cm
RELATED QUESTIONS
A force is applied on (i) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in the above two cases?
Less force is needed when applied at a farther distance from the pivoted point.
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 |
Write an expression for the change in momentum of a body of mass m moving with velocity v if v << c.
State the condition when the change in the momentum of a body depends only on the change in its velocity.
A steering wheel of diameter 0.5 m is rotated anticlockwise by applying two forces each of magnitude 6 N. Draw a diagram to show the application of forces and calculate the moment of forces applied.
State two factors affecting the turning effect of a 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.
Calculate the magnitude of the force of a couple, when the arm of the couple is 63 cm and the moment of the couple is 21 Nm.
Clockwise moment produced by a force about a fulcrum is considered to be ______.
