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A uniform half meter rule balances horizontally on a knife-edge at 29 cm mark when a weight of 20 gf is suspended from one end
1) Draw a diagram of the arrangement
2) What is the weight of the half meter rule?
Concept: Centre of Gravity
How does uniform circular motion differ from uniform linear motion?
Concept: Uniform Circular Motion (UCM)
Give an example of a non-contact force which is always of attractive nature
Concept: Centre of Gravity
How does the magnitude of this non-contact force on the two bodies depend on the distance of separation between them?
Concept: Moment (Turning Effect) of a Force Or Torque
An effort is applied on the bigger wheel of a gear having 32 teeth. It is used to turn a wheel of 8 teeth. Where it is used.
Concept: Moment (Turning Effect) of a Force Or Torque
On what factor does the position of the center of gravity of a body depend?
Concept: Centre of Gravity
What is the SI unit of the moment of force?
Concept: Moment (Turning Effect) of a Force Or Torque
Name the factors affecting the turning effect of a body
Concept: Moment (Turning Effect) of a Force Or Torque
In a beam balance, when the beam is balanced in a horizontal position, it is in ______ equilibrium.
Concept: Equilibrium of Bodies and Its Types
Explain the motion of a planet around the Sun in a circular path.
Concept: Centre of Gravity
Where can a body execute free vibrations?
Concept: Moment (Turning Effect) of a Force Or Torque
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.
Concept: Moment (Turning Effect) of a Force Or Torque
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?
Concept: Moment (Turning Effect) of a Force Or Torque
What is the weight of a body placed at the centre of the earth?
Concept: Centre of Gravity
Is it possible to have an accelerated motion with a constant speed? Explain
Concept: Uniform Circular Motion (UCM)
Why is the motion of a body moving with a constant speed around a circular path said to be accelerated?
Concept: Uniform Circular Motion (UCM)
A half metre rod is pivoted at the centre with two weights of 20gf and 12gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.
1) Which of the two forces acting on the rigid rod causes clockwise moment?
2) Is the rod in equilibrium?
3) The direction of 20 kgf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?
Concept: Moment (Turning Effect) of a Force Or Torque
At which point is the centre of gravity situated in a triangular lamina?
Concept: Centre of Gravity
