EASY
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List the different types of pulleys.

Important Questions on Simple Machine

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Science>Physics>Simple Machine>Pulley

How is it possible to increase the M.A. of the given lever without increasing its length?

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EASY
Science>Physics>Simple Machine>Pulley
Mechanical advantage (MA),  Load (L) and effort (E) are related as :
HARD
Science>Physics>Simple Machine>Pulley

The diagram below shows a pulley arrangement:

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Copy the diagram and mark the direction of tension on each stand of the string.
What is the velocity ratio of the arrangement?
If the tension acting on the string isT, then what is the relationship between T and effort E?
If the free end of the string moves through a distance x, find the distance by which the load is raised.

EASY
Science>Physics>Simple Machine>Pulley

Identify the class of lever shown in the diagram below.

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EASY
Science>Physics>Simple Machine>Pulley

The diagram below shows a claw hammer used to remove a nail: 

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(i) To which class of lever does it belong?
(ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.

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Science>Physics>Simple Machine>Pulley
State the class of levers and the relative positions of load (L)  effort (E) and fulcrum (F) in a bottle opener?
MEDIUM
Science>Physics>Simple Machine>Pulley
Draw Diagrams to illustrate the position of fulcrum load and effort, in the following :
A seesaw .
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Science>Physics>Simple Machine>Pulley
Explain the term mechanical advantage. State its unit.
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Science>Physics>Simple Machine>Pulley
Name the three classes of levers and distinguish between them. Give two examples of each class.
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Science>Physics>Simple Machine>Pulley
Draw a labelled sketch of a class III lever. Give one example of this kind of lever.
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Science>Physics>Simple Machine>Pulley
Explain why the mechanical advantage of a Class II type of lever is always more than one.
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Science>Physics>Simple Machine>Pulley
A pair of scissors has its blades 15 cm long, while its handles are 7.5 cm long. What is its mechanical advantage?
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Science>Physics>Simple Machine>Pulley
State the class of levers and the relative positions of load (L) effort (E) and fulcrum (F) in sugar tongs .
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Science>Physics>Simple Machine>Pulley
Figure below shows a lever in use.
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(a) To which class of lever does it belong?
(b) If AB=1 m, AF=0.4 m, find its mechanical advantage,
(c) calculate the value of E.
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Science>Physics>Simple Machine>Pulley
Name a machine to change the direction of force?
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Science>Physics>Simple Machine>Pulley
Draw a labelled diagram of a class II lever. Give one example of such a lever.
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Science>Physics>Simple Machine>Pulley
Explain why the mechanical advantage of the class III type of lever is always less than 1.
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Science>Physics>Simple Machine>Pulley
Draw a diagram of a lever which is always used as a force multiplier. How is the effort arm related to the load arm in such a lever?
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Science>Physics>Simple Machine>Pulley
Classify the following into lever as class I, class II or class III: a catapult.
MEDIUM
Science>Physics>Simple Machine>Pulley
A man uses a crowbar of length 1.5 m to raise a load of 75 kgf by putting a sharp edge below the bar at a distance 1 m from his hand. Draw a diagram of the arrangement showing the fulcrum (F), load (L) and effort (E) with their directions. State the kind of lever. Calculate: (i) load arm, (ii) effort arm, (iii) mechanical advantage and (iv) the effort needed.