MCQ
A ball falls from a building and covers $5m$ in $10s.$ What is the acceleration?
- ✓$0.1\ m/ s^2$
- B$0.2\ m/ s^2$
- C$9.81\ m/ s^2$
- D$10\ m/ s^2$
✓
Answer
Correct option: A.
$0.1\ m/ s^2$
Assuming the ball falls with zero initial velocity, then according to the second equation of motion, $\text{s}=\text{ut}+\big(\frac{1}{2}\big)\text{at}^2=\big(\frac{1}{2}\big)\text{at}^{2}.$
When we put $t = 10s,$ we get $a = 0.1\ m/ s^2$.
When we put $t = 10s,$ we get $a = 0.1\ m/ s^2$.
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