11. What two factors are needed to measure the position of an object?, 12. What is the formula for momentum?, 13. State Newton's 3rd Law of Motion., 14. What is an unbalanced force that keeps an object moving in a circular path?, 15. What is force?, 16. What is friction?, 17. What are the 4 types of friction?, 18. What does “Vector Quantity” mean?, 19. What does “Scalar Quantity” mean?, 20. What is acceleration due to gravity on earth? (g).

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