A car starts from rest and accelerates at $5 \,\mathrm{~m} / \mathrm{s}^{2}$. At $t=4 \mathrm{~s}$, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at $\mathrm{t}=6\, \mathrm{~s}$ ?
(Take g $\left.=10\, \mathrm{~m} / \mathrm{s}^{2}\right)$
A car starts from rest and accelerates at $5 \,\mathrm{~m} / \mathrm{s}^{2}$. At $t=4 \mathrm{~s}$, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at $\mathrm{t}=6\, \mathrm{~s}$ ?
(Take g $\left.=10\, \mathrm{~m} / \mathrm{s}^{2}\right)$
- [NEET 2021]
- A
$20\, \mathrm{~m} / \mathrm{s}, 5 \,\mathrm{~m} / \mathrm{s}^{2}$
- B
$20 \,\mathrm{~m} / \mathrm{s}, 0$
- C
$20\, \sqrt{2} \mathrm{~m} / \mathrm{s}, 0$
- D
$20 \,\sqrt{2} \mathrm{~m} / \mathrm{s}, 10\, \mathrm{~m} / \mathrm{s}^{2}$
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