JEE Main 202529 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2025
- Date
- 29 January
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Motion in One Dimension
JEE Main 2025 · 29 January · Morning Shift · Physics · Motion in One Dimension
The maximum speed of a boat in still water is (27 ~km / h ). Now...
The maximum speed of a boat in still water is (27 / ). Now this boat is moving downstream in a river flowing at (9 / ). A man in the boat throws a ball vertically upwards with speed of (10 / ). Range of the ball as observed by an observer at rest on the river bank, is _______ cm. (Take (10 / \mathrm{s}^2))
Correct answer
0
Step-by-step solution
\overrightarrow{\mathrm{v}_{\mathrm{b}}=9+27=36 \mathrm{ km} / \mathrm{hr}
\begin{aligned} & \overrightarrow{\mathrm{v}_{\mathrm{b}}=36 \times \frac{1000}{36000}=10 \mathrm{ m} / \mathrm{sec} \\ & \text{ Time of flight }=\frac{2 \times 10}{10}=2 \mathrm{sec} \\ & \text{ Range }=10 \times 2=20 \mathrm{ m}=2000 \mathrm{ cm}\end{aligned}