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# Quick mechanics questions watch

1. Ok, for Normal Contact Force/Normal Reaction, is the mass is 5 grams, is R = 5g or 0.05g?
2. 0.05g
3. (Original post by 04nunhucks)
Ok, for Normal Contact Force/Normal Reaction, is the mass is 5 grams, is R = 5g or 0.05g?
I kg would be 9.8N
so 1000g*would be 9.8N
so*1g*would be 0.0098N
4. 0.005g
5. Ok thanks guys

I've now got to find s, but I don't know (or need) t. I've got u,v and a :/
6. v^2 = u^2 + 2as
7. so s = (v^2 - U^2 )/2a
8. Thanks frances222
9. v^2 = u^2 + 2as
10. your welcome, haha mechanics was the death of me
hello resit
11. (Original post by frances222)
your welcome, haha mechanics was the death of me
hello resit
good luck :P

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