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Standard VI
Physics
Question

Name a machine which is used to be a multiply force.
  1. a moveable pulley.
  2. a moveable pendulum.
  3. a fixed pendulum.
  4. a fixed pulley.

A
a moveable pulley.
B
a fixed pulley.
C
a moveable pendulum.
D
a fixed pendulum.
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Solution
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A Wheel and Axle can be used to multiply Force
The wheel and axle consists of a wheel or crank that is rigidly attached to an axle. A wheel and axle is similar to a lever with unequal arms. The ideal mechanical advantage of the wheel and axle is IMA=R/r
where, R = radius of the wheel
r = radius of the axle
The wheel and axle is often used to multiply speed instead of force. Example: wheels on bicycles and motor vehicles.
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