A) Applied by hand on sponge ball
B) That makes it tough to lift heavy objects
C) That pulls down all objects towards earth
D) That prevents us from slipping while walking
Correct Answer: D
Solution :
The force that stops us from slipping while walking is the force of friction. It is the force that acts between a surface and the object moving on it in the opposite direction of object's movement. It slows down and finally stops a moving object. To make the movement of coins on the carrom board, smoother talcum powder is used which reduces friction.
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