National Science Olympiad Forum By SOF Olympiad Trainer - Page 17

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

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Class : Class 6
Trees are the source of lumber.

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
D

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Subject :NSO    Class : Class 8

A wooden table of mass 100 kg is lying on a floor. A man pushes the table with a force of 100 N and another man tends to stop the table with a force of 200 N as shown in the figure. If the friction between the floor and table is 80 N, then


A The table will move towards right with 100 N force
B The table will move towards left with 20 N force
C The table will remain at rest
D The table will move towards right with 20 N force.


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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
The correct answer is option b as the ball is smaller than prism so it will become hidden in the prism .

Ans 2:

Class : Class 3

Ans 3:

Class : Class 3
There is no consept of transculsent,transparent and opaque Arha. Thec question says to find the shape of shadow not what is transparent ,tranclusent or opaque. The ball is in the shadow number b inside the woddent prism and wooden prism is bigger hence option cb is correct.

Ans 4:

Class : Class 3
b is correct

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