Advertisements
Advertisements
प्रश्न
Define force.
Advertisements
उत्तर
Force is a physical cause that changes or may tend to change the state of rest or the state of motion of an object.
APPEARS IN
संबंधित प्रश्न
Name the factors affecting the turning effect of a body
Where can a body execute free vibrations?
The S.I. unit of force is kgf. (kilogram-force)
A force always produces both the linear and turning motions.
What do you mean by the clockwise and anti-clockwise moment of force?
Name of S.I. unit of momentum.
State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and mass for a constant force.
Is moment of force a scalar or a vector?
State one way to reduce the moment of given force about a given axis of rotation.
Explain the motion of a planet around the sun in a circular path.
Give an example for each of the following uses of a machine:
to change the point of application of force
Give an example of the following uses of a machine:
to change the direction of force
Fig. shows a uniform meter scale weighing 100 N pivoted at its centre. Two weights of 500 N and 300 N are hung from the ruler as shown in fig.
(i) Calculate total clockwise and anticlockwise moments.
(ii) Calculate difference in clockwise moment and anticlockwise moment.
(iii) Calculate the distance from O where a 100 N weight should be suspended to balance the meter scale.
A jack screw is provided with a long arm. Explain why?
State when the moment of force is positive and when it is negative.
A uniform metre rule rests horizontally on a knife-edge at the 60 cm mark when a mass of 10 gram is suspended from one end. At which end must this mass be suspended? What is the mass of the rule?
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.
Calculate the length of arm of couple, if a force of 13 N produces a moment of couple of 14.3 Nm.
On a see-saw, two children of masses 30 kg and 50 kg are sitting on one side of it at distance 2 m and 2.5 m respectively, from its middle, where should a man of mass 74 kg sit to balance it?
