Advertisements
Advertisements
Question
State one way to decrease the moment of a given force about a given axis of rotation.
Advertisements
Solution 1
Either decrease the force or decrease the perpendicular distance of force from the axis of rotation.
Solution 2
decrease the perpendicular distance of force from axis of rotation.
APPEARS IN
RELATED QUESTIONS
A spanner of length 10 cm is used to open a nut by applying a minimum force of 5.0 N. Calculate the moment of force required.
The spanner (or wrench) has a long handle.
State Newton's first law of motion. Why is it called the law of inertia?
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?
A, B and C are the three forces each of magnitude 4 N acting in the plane of the paper as shown in Figure. The point O lies in the same plane.

- Which force has the least moment about O? Give a reason.
- Which force has the greatest moment about O? Give a reason.
- Name the forces producing
(a) Clockwise
(b) anticlockwise moments. - What is the resultant torque about the point O?
The figure shows two forces each of magnitude 10 N acting at the point A and B at a separation of 50 cm, in opposite directions. Calculate the resultant moment of two forces about the point.
- A,
- B and
- O situated exactly at the middle of the two forces.

A uniform metre rule of weight 10gf is pivoted at its 0 mark.
What moment of force depresses the rule?
Define the moment of force.
Calculate the minimum distance between point of application of force and axis of rotation of a rigid body, if a force 125 N produces a moment of force of 25.75 Nm.
