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A staircase is an example of a class 3  lever.

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Important Questions on Simple Machines

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Which of these simple machines helps to move heavier objects to height?
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The ramp in hospitals in an example for an _____.
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Why ramps are built on a railway platform?
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Give a reason for the following:

We use an inclined plane to push up heavy objects. 

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This is not an example of an inclined plane. 
 
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Define inclined plane.
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Define an inclined plane.    
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A huge rock has blocked a road after a landslide. What could be done to remove or to move the rock from the road easily?
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Fill in the blank space with the right word.

_____ (Lever/ Inclined plane) is used to lift simple loads.

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Ramps are used in hospitals to transport patients on wheelchairs.

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How is an inclined plane useful to us?
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You have to load your suitcase onto a truck. You are not able to lift the suitcase, Which simple machine can help you do this? Why?
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Science>Physics>Simple Machines>Simple Machines
Why do people use a wooden plank to load or unload things from trucks?
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Science>Physics>Simple Machines>Simple Machines
Can you predict what will happen in the picture shown?
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Which simple machine has two inclined planes?
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Why are inclined planes used to move things?
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Ramps act as a/an _____.
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Choose the appropriate word and fill in the blank.

The simple machine in the hill slope is a/an _____ (inclined plane/second-class lever).

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Science>Physics>Simple Machines>Simple Machines
A ramp is an example of ­­­­_____.
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Science>Physics>Simple Machines>Simple Machines

Which of the two paths (A or B) would you take to move up the mountain? Why?

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