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Subject :NSO    Class : Class 3

The girl a is putting more efforts to pull the sack bag as compared to the girl b. Girl a has to work more against a force which also __________.

A Changes the direction of a moving object
B Causes all objects to fall to the ground
C Prevents us from slipping when we walk
D Makes a stationary object to move

Ans 1:

Class : Class 3
How is it C

Ans 2:

Class : Class 7

Ans 3:

Class : Class 3

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