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प्रश्न
A uniform metre scale can be balanced at the 70.0 cm mark when a mark when a mass 0.05 kg is hung from the 94.0 cm mark
- draw a diagram of the arrangement
- Find the mass of the metre scale
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उत्तर
1) A diagram of the given arrangement is shown below.
2) As the given meter scale is a uniform scale. So its centre of gravity lies at 50 cm. Let the mass of the meter-scale be W1 kg.
From the principle of moments
Anticlockwise moment = clockwise moment
m1x1 = m2x2
m1 × (70 − 50) = 0.05 × (94 − 70)
m1 = `(0.05 xx 24)/20`
= 0.06 kg
= 60 g
संबंधित प्रश्न
Name the factors affecting the turning effect of a body
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?
Name of S.I. unit of momentum.
Name and define the S.I. and C.G.S. units of force. How are they related?
What do you understand by the clockwise and anticlockwise moment of force? When is it taken positive?
A nut is opened by a wrench of length 10 cm. if the least force required is 5.0 N. find the moment of force needed to turn the nut.
Classify the following amongst contact and non-contact forces.
normal reaction force,
State two factors affecting the turning effect of a force.
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?
