Advertisements
Advertisements
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
1) draw a diagram of the arrangement
2) Find the mass of the metre scale
उत्तर
1) 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 = `(0.05xx24)/20`
= 0.06 kg.
= 60 gm.
APPEARS IN
संबंधित प्रश्न
State the S.I. unit of moment of force.
State one way to decrease the moment of a given force about a given axis of rotation.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
State the condition when the change in the momentum of a body depends only on the change in its velocity.
A body is acted upon by two forces of magnitude F but in opposite directions. State the effect of the force if both forces act at the same point of the body.
Classify the following amongst contact and non-contact forces.
gravitation force
Classify the following amongst contact and non-contact forces.
electrostatic force
Define the moment of force.
Write the expression for calculating the moment of force about a given point.
Two unlike forces (parallel) of 10 N and 25 N act at a distance of 12 cm. from each other. Find the point about which the body balance.
