Give reasons for the following-
(a) We tend to slip when we step on a banana peel.
(b) It is easier to push a lighter box than a similar heavy box on the same floor.
(c) The force, needed to start a cart, is (somewhat) greater than the force
needed to keep it moving with a uniform speed.
(d) Sportsmen use shoes fitted with spikes. (e) ball-bearing are used in machine. (f) tyres of the vehicles need to be changed regularly. (g) machines parts are frequently oiled or greased. (h) sport car, aeroplanes and boats are designed to have a streamlined shape. (i) metal chains are wrapped on tyres when they run on icy roads. (j ) rollers are used for transporting luggage
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