

MCQOPTIONS
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1. |
Identify the methods of increasing and decreasing friction and choose the correct option. (i) The tyres of vehicles have treads. (ii) Gymnasts often apply a coarse material on their hands. (iii) Saliva in our mouth helps us to swallow food. (iv) A surgeon powders his hand before pulling on his plastic gloves |
A. | (i) (ii) (iii) (iv) Increasing Decreasing Increasing Decreasing |
B. | (i) (ii) (iii) (iv) Decreasing Increasing Decreasing Increasing |
C. | \[8h/9\] metres from the ground |
D. | (i) (ii) (iii) (iv) Decreasing Decreasing Increasing Increasing |
Answer» D. (i) (ii) (iii) (iv) Decreasing Decreasing Increasing Increasing | |