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How stokes law helps a man come down with the help of a parachute?

Important Questions on Balanced Forces

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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
A body shape which offers very little resistance to the flow of air (or water) around it is called:
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Two equal forces are said to be _____ when they act from opposite directions.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
The shape of an aeroplane is similar to that of a _____ in flight. (Choose from here: ship/bird/cycle)
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Unit of illumination is _____.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Bodies of birds and fishes are _____ .
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Two forces P and Q act on an object in the same direction and P>Q. The net force on the object is _____P+Q/P-Q.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Which of the following does not have a streamlined shape?
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
The standard units of measurement are known as_____ units.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
To reduce drag, the object should have _____ shape.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Shapes that are designed to reduce air resistance are called _____ shapes.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
When two forces act in the same direction, then the net force acting is _____ of the two forces.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Cars and speedboats are _____(painted/streamlined) to reduce drag.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
The shape of the aeroplane is _____(hexagonal/streamlined) to reduce friction from air.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces

For doing the experiment "to study the third law of motion using two spring balances", four students A, B, C and D set up their apparatus as shown below. The best setup is that of student.

(A) 

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(B) 

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(C) 

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(D) 

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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces

Fill in the following blanks with suitable words:

Objects which can move quickly through the water have a _____ shape.

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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
A shape that is slightly rounded in front and narrower at the back is called a _____ shape. (circular, streamlined, aerodynamic)
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
If the two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be _____.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Cars and speedboats are _____ to reduce drag.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
Boats and aero planes are _____( sharpened/streamlined) so as to reduce fluid friction.
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Physical and Earth Science>Systems>Balanced Forces>Addition and Subtraction of Forces
All objects moving in fluids have _____ shape to reduce friction.