Machines — Important Questions
ICSE · Class 10 · Physics
44 important questions from Machines for ICSE Class 10 Physics, with answers. Includes multiple choice and multiple correct questions.
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See them allImportant Questions from Machines
Which of the following are characteristics of an ideal machine?
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No friction between parts, Weightless parts, 100% efficiency, Output work equals input work
An ideal machine has no friction, weightless parts, 100% efficiency, and output work equals input work. M.A. can be any value depending on the machine type.
Which of the following are examples of Class II levers?
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A nutcracker, A wheelbarrow
In a Class II lever, the load lies between the fulcrum and the effort, and its mechanical advantage is greater than 1. A nutcracker and a wheelbarrow are standard examples of Class II levers. Scissors and a crowbar are Class I levers because the fulcrum lies between load and effort.
The mechanical advantage of a single fixed pulley is:
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1
A single fixed pulley has M.A. = 1 because the load and effort are equal. Its main advantage is changing the direction of effort.
A single movable pulley has a mechanical advantage of:
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2
A single movable pulley has M.A. = 2 because the load is supported by two segments of the rope, so effort = Load/2.
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