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1. an object is thrown vertically upwards with a initial speed of 20 m/s.calculate how high it will reach before falling back down.
2. (Original post by nikhil kanade)
an object is thrown vertically upwards with a initial speed of 20 m/s.calculate how high it will reach before falling back down.
I'll claim my lollipop now

3. (Original post by nikhil kanade)
an object is thrown vertically upwards with a initial speed of 20 m/s.calculate how high it will reach before falling back down.
Think about every objects acceleration due to gravity on earth.
At GCSE, you learn that it's 10m/s^2 downwards.
Then it's maximum height is the distance travelled when it reaches a speed of 0m/s.
From that you can work out the time taken from t = change in speed / a
And you can also work out average speed since it's a constant decceleration you can day the average speed is the average of 20 and 0 which is 10.
And therefore distance travelled = average speed * time.

Spoiler:
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I'm avoiding SUVAT formulae due to it being GCSE
4. (Original post by StayWoke)
Think about every objects acceleration due to gravity on earth.
At GCSE, you learn that it's 10m/s^2 downwards.
Then it's maximum height is the distance travelled when it reaches a speed of 0m/s.
From that you can work out the time taken from t = change in speed / a
And you can also work out average speed since it's a constant decceleration you can day the average speed is the average of 20 and 0 which is 10.
And therefore distance travelled = average speed * time.

Spoiler:
Show

I'm avoiding SUVAT formulae due to it being GCSE

hey this might sound dumb but why are you "avoiding suvat due to it being GCSE"? are we not supposed to use that at gcse? I learnt suvat in physics and thats literally the only thing i understand and thats how i managed to understand my test. (im year 9, taking my gcse's in 2019)
5. (Original post by Savannah_dl)
hey this might sound dumb but why are you "avoiding suvat due to it being GCSE"? are we not supposed to use that at gcse? I learnt suvat in physics and thats literally the only thing i understand and thats how i managed to understand my test. (im year 9, taking my gcse's in 2019)
In my GCSEs we didnt do SUVAT in maths or in physics. It's probably new in your GCSEs

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Updated: November 13, 2017
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