Column 'A 1. Lubricant 2. Sand 3. Fluid friction 4. Streamlined shape 5. Spring balance 6. Rolling friction Column 'B (a) Aeroplane (b) Drag (c) Reduce friction (d) Increase friction (e) Wheels (f) Measuring force
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sorry.i don't know because I in 6 class I am really sorry
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column A
a) lubricant-reduce friction
b) sand-increase friction
c) fluid friction-measuring friction
d) streamlined shape-aeroplane
e) spring balance-drag
f) rolling friction-wheels
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