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URGENT!!!!!!!!Havimg an understanding of where forces are necessary?
Im studying for a science exam very soon and I need some help with these questions
1) what are the effects of balanced and unbalanced forces (at least 2 objects)
2) state that the density of an object and its shape and design are important in deciding whether it will sink or float
3) Name an object used in a sport that needs to be strong to carry out its job and provide enough upthrust
4) Explain how the speed an object is travelling effects stopping distance for example in cycling
5) state two or more factors that could affect the stopping distance of an object.
THANKS VERY MUCH!!
2 Answers
- Anonymous7 years agoFavorite Answer
Not sure if they're right but worth consideration:
1) Not sure, sorry.
2) They are very important. If you built a ship shaped like a vertical javelin then all of the weight is above a very small surface area meaning it will sink. By spreading the weight/density over a larger surface area/shape it will more likely provide sustainable buoyancy.
3) Pole-vault. It must be strong to bend but not snap and then thrust the athlete up over the bar.
4) The faster an object is travelling the more friction is required to slow it down. If friction is applied at a constant rate then it will take an faster moving object longer to slow down than a slower one and therefore more distance.
5) - Speed
- Gravity: is it on a gradient?
- Wind: is there a head or tail wind)
- Surface: are you trying to stop on a surface of glue or sand. Glue will provide grip, sand will not.