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Earlier discussion
3 older comments kept for context.
Dr. Joseph Udoh
No need for long Calculation: just use equation of motion. V²=U²+2as
Since U=0. V=5; a=10; and S=?
Therefore, 5²=2x10s
25= 20s
S= 25/20= 1.25
S = 1.3 approximately
Maxjoe
No need for long Calculation: just use equation of motion. V²=U²+2as
Since U=0. V=5; a=10; and S=?
Therefore, 5²=2x10s
25= 20s
S= 25/20= 1.25
S = 1.3 approximately
Idowu Taye Ebenezer
Let's start from K.E = P.E:
\(\text{mgh} = \frac{1}{2}\text{mv}^2\)
\(\text{mgh} = \cfrac{\text{mv}^2}{2}\)
Cross multiply:
It gives us:
\(2\text{mgh} = \text{mv}^2\)
Divide both sides by m:
It gives:
\(2\text{gh} = \text{v}^2\)
To get the value of h, divide both sides by 2g
The formula to use will become:
\(\text{h} = \cfrac{\text{v}^2}{2\text{g}}\)
Then \(\text{v} = 5\text{ms}^{-1}\)
g = 10. Put this into the above formula:
\(\text{h} = \cfrac{5^2}{2 \times 10}\)
\(\text{h} = \cfrac{25}{20}\)
\(\text{h} = 1.3\text{m}\)