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Date:, , Increasing and Decreasing Friction, , Q1. Write true or false., , A. We increase friction of the car wheel to have better grip over the road. True, , B. We never need to reduce friction because it is useful in all the cases. False, , Q2. Complete the table., , , , Action, , Does it increase or decrease, friction?, , How does this help?, , , , A. Applying grease, on a machine part, , Reduces friction, , It decreases wear-and-tear, that happens due to friction., , , , B. Using wheels in a, bag, , Reduces friction, , Less force is required to, drag the luggage., , , , C. Spikes and grooves, in shoes, , , , Increases friction, , It helps the shoes to have, a better grip on the ground,, which prevents from slipping., , , , Q3. Leo is a weightlifter. What should he do to increase friction in order to get a better grip while, , lifting the weight?, , Answer may vary. Sample answer., , Leo should apply dust or chalk powder on his hands to increase the friction and have a better