Advertisements
Advertisements
Questions
State two factors on which affect moment of force.
State the factors on which the moment of force depends.
Advertisements
Solution
Factors on which moment of force depends
- The magnitude of the force applied.
- The distance of the line of action of the force from the axis of rotation.
RELATED QUESTIONS
What do you mean by the clockwise and anti-clockwise moment of force?
A potter turns his wheel by applying a force through the stick near the rim of wheel.
Sleepers are used below the rails.
A wheel of diameter 2 m can be rotated about an axis passing through its center by a moment of force equal to 2.0 Nm. What minimum force must be applied on its rim?
What are contact forces? Give two Example
State Newton's first law of motion. Why is it called the law of inertia?
Calculate the acceleration produced in a body of mass 50 g when acted upon by a force of 20 N.
State one way to reduce the moment of given force about a given axis of rotation.
The diagram in the figure shows a uniform metre rule weighing 100 gf, pivoted as its centre O. two weight 150 gf and 250 gf hang from the point A and B respectively of the metre rule such that OA = 40 cm and OB = 20 cm . Calculate
the total anticlockwise moment about o.

Fig. 5 shows a uniform meter scale weighing 200 gf. Provided at its centre. Two weights 300 gf and 500 gf are suspended from the ruler as shown in the diagram. Calculate the resultant torque of the ruler and hence calculate the distance from mid-point where a 100 gf should be suspended to balance the meter scale.

State one factor on which the magnitude of a non-contact force depends. How does the magnitude of a non-contact force change along with distance?
What is meant by the term ‘moment of force’? If the moment of force is assigned a negative sign then will the turning tendency of the force be clockwise or anti-clockwise?
State the effects that a force can produce. Given one example of each.
The perpendicular distance between the point of application of force and turning point is 1.75 m when a force of 80 N acts on a rigid body. Calculate the moment of force.

A metal rod AB of length 80 cm is balanced at 45 cm from the end A with 100 gf weights suspended from the two ends.
- If this rod is cut at the center, C, then compare the weight of AC to the weight of BC. (Use >, < or =)
- Give a reason for your answer in (a).
A person standing in front of a cliff fires a gun and hears its echo after 3 s. If the speed of sound in air is 336 ms−1.
- Calculate the distance of the person from the cliff.
- After moving a certain distance from the cliff, he fires the gun again, and this time the echo is heard 1.5 s later than the first. Calculate the distance that the person moved.
A nut is opened by a wrench of length 25 cm. If the least force required is 10 N, find the moment of force needed to turn the nut.
