A fire tongs has its arms $20 c m$ long. It is used to lift a coal of weight $1.5 k g f$ by applying an effort at a distance $15 c m$ from the fulcrum. Find the effort needed.

0.2 k g f

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1.5 k g f

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2.5 k g f

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2.0 k g f

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Solution

The correct option is C $2.0 k g f$
$L o a d = 1.5 k g f$
$L o a d a r m = 20 c m$
$E f f o r t a r m = 15 c m$
$E f f o r t = 20 \times 1.5 / 15 = 2.0 k g f$
The fulcrum in tongs is the joint end of the arms

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A fire tongs has its arms 20 cm long. It is used to lift a coal of weight 1.5 kgf by applying an effort at a distance of 15 cm from the fulcrum. Find : (i) the mechanical advantage of the fire tongs , and (ii) the effort needed.

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by applying an effort at a distance

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A fire tongs has its arms 20 cm long. It is used to lift a coal of weight 1.5 kgf as shown in the figure below by applying an effort at distance 15 cm from the fulcrum. Find the mechanical advantage of fire tongs.

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A fire tongs has its arms 20 cm long. It is used to lift a coal of weight 1.5 kgf by applying an effort at a distance 15 cm from the fulcrum. Find the effort needed.

The correct option is C 2.0kgfLoad=1.5kgfLoad arm=20cmEffort arm=15cmEffort =20×1.5/15=2.0kgfThe fulcrum in tongs is the joint end of the arms

A fire tongs has its arms $20 c m$ long. It is used to lift a coal of weight $1.5 k g f$ by applying an effort at a distance $15 c m$ from the fulcrum. Find the effort needed.

The correct option is C $2.0 k g f$
$L o a d = 1.5 k g f$
$L o a d a r m = 20 c m$
$E f f o r t a r m = 15 c m$
$E f f o r t = 20 \times 1.5 / 15 = 2.0 k g f$
The fulcrum in tongs is the joint end of the arms