Duration: 2:10

109 views

1

The value of acceleration due to gravity at Earth's surface is \( 9.8 \mathrm{~ms}^{-2} \). The altitude above its surface at which the acceleration due to gravity decreases to \( 4.9 \mathrm{~ms}^{-1} \) is close to (Radius of earth \( \left.=6.4 \times 10^{6} \mathrm{~m}\right) \)
[JEE (Main) 2019]
(a) \( 2.6 \times 10^{6} \mathrm{~m} \)
(b) \( 6.4 \times 10^{6} \mathrm{~m} \)
(c) \( 9.0 \times 10^{6} \mathrm{~m} \)
(d) \( 1.6 \times 10^{6} \mathrm{~m} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live