JEE Main 2025 Physics question
The maximum speed of a boat in still water is 27 km/h. Now this boat is moving downstream in a river flowing at 9 km/h. A man in the boat throws a ball vertically upwards with speed of 10 m/s. Range of the ball as observed by an observer at rest on the river bank, is cm. (Take g = 10 m/s²)
Answer: 2000
Solution
Boat speed = 36 km/hr = 10 m/s. Time of flight = 2 sec. Range = 10×2 = 20 m = 2000 cm.