Question

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Answer 1

Answer:

1. pull (someone or something) along forcefully, roughly, or with difficulty.

this is meant by drag.

2. The surface exerts and equal and opposite force on you and it is this force that enables you to move forwards (horizontal red arrow). ... Icy roads have very low friction and so can't apply much force on you before you slip and so it is difficult to walk.

3. There are many disadvantages of friction such as: Opposes the motion of a vehicle or object. Causes overheating of machines. Causes extra energy to be used.

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Answer 2

Explanation:

8. to pull somebody/something along with difficulty

9. The surface exerts and equal and opposite force on you and it is this force that enables you to move forwards (horizontal red arrow). ... Icy roads have very low friction and so can't apply much force on you before you slip and so it is difficult to walk.

10. Disadvantages of Friction

Friction causes moving objects to stop or slow down. Friction produces heat causing wastage of energy in machines. Friction causes wear and tear of moving parts of macinery, soles of shoes, etc.