JEE PYQ: Laws Of Motion Question 14
Question 14 - 2021 | 26 Feb Shift 2] (MCQ)
An inclined plane making an angle of $30°$ with horizontal is placed in a uniform horizontal electric field $200,\text{N/C}$. A body of mass 1 kg and charge 5 mC is allowed to slide down from rest at a height of 1 m. If the coefficient of friction is 0.2, find the time taken by the body to reach the bottom.
(1) 2.3 s
(2) 0.46 s
(3) 1.3 s [Correct]
(4) 0.92 s
Show Answer
Answer: (3)
Solution
$a = 2.3,\text{m/s}^2$, $s = 2$ m, $t = \sqrt{\frac{2s}{a}} \approx 1.3$ s.
BETA
