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A brass ball is hanging from a stiff cotton thread. Draw a neat labeled diagram showing the forces acting on the brass ball and cotton thread
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How does the magnitude of this non-contact force on the two bodies depend on the distance of separation between them?
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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.
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On reversing the direction of the current in a wire, the magnetic field produced by it gets ______.
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What is the SI unit of the moment of force?
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Name the factors affecting the turning effect of a body
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How is work done by a force measured when the force is in an angle to the direction of displacement?
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Where can a body execute free vibrations?
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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.
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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?
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Identify the following wires used in a household circuit: The wire is also called as the phase wire.
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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?
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State the S.I. unit of moment of force.
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State one way to obtain greater moment of a given force about a given axis of rotation.
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What do you understand by refraction of light?
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What are contact forces? Give two Example
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What are non-contact forces? Give two example
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Classify the following amongst contact and non-contact force.
force of tension in a string
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State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
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State Newton's first law of motion. Why is it called the law of inertia?
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