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Standard VI

Mathematics

Word Problems

Fig, below sh...

Question

Fig, below shows a wheelbarrow of mass $15 k g$ carrying a load of $30 k g f$ with its centre of gravity at $A$ . The points $B$ and $C$ are the centre of wheel and tip of the handle such that the horizontal distance $A B = 20 c m$ and $A C = 40 c m$ . What is the effort arm ?

20 c m

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60 c m

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40 c m

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30 c m

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Solution

The correct option is B $60 c m$
Load Arm = Distance of load from Fulcrum $= A B = 20 c m$
Effort Arm = Distance from effort applied to Fulcrum $= A B + A C = 20 + 40 = 60 c m$

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A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the effort arm and the mechanical advantage of the crowbar.

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Fig, below shows a wheelbarrow of mass 15 kg carrying a load of 30 kgf with its centre of gravity at A. The points B and C are the centre of wheel and tip of the handle such that the horizontal distance AB=20cm and AC=40cm. What is the effort arm ?

The correct option is B 60cmLoad Arm = Distance of load from Fulcrum =AB=20cmEffort Arm = Distance from effort applied to Fulcrum =AB+AC=20+40=60cm

Fig, below shows a wheelbarrow of mass $15 k g$ carrying a load of $30 k g f$ with its centre of gravity at $A$ . The points $B$ and $C$ are the centre of wheel and tip of the handle such that the horizontal distance $A B = 20 c m$ and $A C = 40 c m$ . What is the effort arm ?

The correct option is B $60 c m$
Load Arm = Distance of load from Fulcrum $= A B = 20 c m$
Effort Arm = Distance from effort applied to Fulcrum $= A B + A C = 20 + 40 = 60 c m$