Gujarat BoardEnglish MediumSTD 9ScienceSound2 Marks
Question
A ball thrown vertically upwards returns to the thrower. How do the kinetic and potential energies of the ball change$?$
✓
Answer
Vertically upward. so the final velocity is $0.$ and gravitational force is $+ g.$ Then equations is$-\text{u}=\text{at}$
$\text{s}=\text{ut}+\frac{1}{2\text{at}^2}$
$-\text{u}^2=2\text{gs}$
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