(i) Friction helps us to hold objects. |
(ii) Friction acts in the opposite direction of motion. |
(iii) Friction causes the surfaces in contact to wear away. |
(iv) Friction produces heat energy. |
A) (i) and (ii)
B) (i), (iii) and (iv)
C) (iii) and (iv)
D) All (i), (ii), (iii) and (iv)
Correct Answer: D
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