State whether the following statements are True or False. (i) A force is always required to change the speed of motion of an object. (ii) Due to friction, the speed of a ball rolling on a flat ground increases. (iii) There is no force between two charged objects placed at a small distance apart.
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Explanation
- (i) True — a force is needed to change an object's speed.
- (ii) False — friction decreases the ball's speed, it does not increase it.
- (iii) False — charged objects do exert an electrostatic force on each other across a distance.