(momentum,circular& projectile motion , gravitation)




有多條程度達A-level 的 物理 疑問，需要求助。



NSS Physics (Force and Motion)

Unless otherwise specified , neglect air resistance and use the values of the constants provided in the Appendix for calculation.

Structured Questions 16 ,17, 淨係18(b)(i)(ii)(iii), (c) (iv), 19 (a) (ii) ,20(b) (c) (d) ,(e)1 , 2 , 3.
冇叫你地做的餘剩部份問題因為我已經曉得懂得。
Steps and arguments are welcome to provide and discuss.






















Answers
16. (a) (iv) seat belts / airbags
17. (a) 1.1 ms^-1 ; 16.5 m
(c) 130 N
20. (b) 200 kN
(c) 7.67 times 10^ 7 J
(d) 42.6 kW

Anyway, thx.

你可以上網揾Mark Scheme，因為呢啲係英國考試局啲Past Paper。

不過，我可以提供一啲hints：
1. F=mv^2/r for circular motion.
2. Use conversation of energy.
3. Count the number of squares.
4. Average speed= TOTAL distance/ TOTAL time.
5. Gravtitational field strength is independent of the mass of the object.
6. For the vertical speed, use y=xtan@.
7. Horizontal and vertical vectors are independent of each other.
8. Normal suvat equations apply, but careful about the components.