Consider a drop of rainwater having a mass of \(1~\text{gm}\) falling from a height of \(1~\text{km}\). It hits the ground with a speed of \(50~\text{m/s}\). Take \(g\) as constant with a value \(10~\text{m/s}^2.\) The work done by the
(i) gravitational force and the
(ii) resistive force of air is:
1. | \((\text{i})~1.25~\text{J};\) \((\text{ii})~-8.25~\text{J}\) |
2. | \((\text{i})~100~\text{J};\) \((\text{ii})~8.75~\text{J}\) |
3. | \((\text{i})~10~\text{J};\) \((\text{ii})~-8.75~\text{J}\) |
4. | \((\text{i})~-10~\text{J};\) \((\text{ii})~-8.75~\text{J}\) |
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?
(1)
(2)
(3)
(4)
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology