I. A force can change the direction of a moving ball. |
ii. An iron object is repelled by a magnet when it is brought near it. |
iii. A smooth surface produces more friction as compared to a rough surface. |
iv. Friction between our feet and the ground makes it possible for us to walk. |
A) i and ii
B) i and iv
C) ii and iv
D) Only iv
E) None of these
Correct Answer: B
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