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secondary 4 | Physics

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Hi,

Qn : When two objects are hit vertically upwards at the same speed (with effect of air resistance), why does the object with smaller mass travel a shorter distance before reaching ground?

Kindly advise, thank you so much.

Ref: https://en.wikipedia.org/wiki/Momentum

1. size of the objects. It doesn't always imply smaller mass, smaller size. Big surface area greater resistance

2, surface texture of the objects. rough surface create more drag.

3. shape of the objects. I guest you heard of streamline body is designed to provide small drag against motion.

Thanks Mr Yong.

In your msg, it keep saying make sense or does not make sense. This is science. We use facts/theory to prove phenomenon. Perhaps, it will be better to pin point what is wrong with the proven expression a = g + kv/m... It tells us that the smaller the m, the bigger the kv/m and the bigger the downward acc. So the mass slow down fast. I do not invent this expression. This expression is derived out. You can point out which step of the derivation has problem?

for your qn

When corrected, he just brushes it off and says you're wasting his time.

When his working is wrong and that is pointed out to him, he will subtly and quietly delete his post without acknowledging the error.

Or, he simply ignores it.

When a term is vague and has different definitions interpretations, usage and conventions, he will only look at his own chosen one and ignore other possibilities

This person is not a verified tutor and his credibility is a big question mark.

Don't bother.

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