Home
Class 9
PHYSICS
A stone is dropped freely in a river fro...

A stone is dropped freely in a river from a bridge. It takes 5 s to touch the water surface in the river. Calculate : the height of the bridge from the water level .

Text Solution

AI Generated Solution

To solve the problem of finding the height of the bridge from which a stone is dropped into a river, we can use the second equation of motion. Here are the steps to find the solution: ### Step-by-Step Solution: 1. **Identify the Given Information**: - Time taken (t) = 5 seconds - Initial velocity (u) = 0 m/s (since the stone is dropped) - Acceleration due to gravity (g) = 9.8 m/s² (approximate value) ...
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • LAWS OF MOTION

    ICSE|Exercise EXERCISE - 3(A)|19 Videos
  • LAWS OF MOTION

    ICSE|Exercise EXERCISE - 3(A) (Multiple Choice Type)|2 Videos
  • LAWS OF MOTION

    ICSE|Exercise TOPIC 3 (4 Marks Questions ) |10 Videos
  • ICSE ANNUAL EXAMINATION -2020

    ICSE|Exercise SECTION-II|45 Videos
  • LIGHT

    ICSE|Exercise TOPIC 2 Spherical Mirrors (4 Marks Questions )|9 Videos

Similar Questions

Explore conceptually related problems

A stone is dropped freely in a river from a bridge. It takes 5 s to touch the water surface in the river. Calculate :the distance covered by the stone in the first 2 s (g = 9.8 m s^(-2) ).

(b) A stone is thrown from a bridge at an angle of 30^(@) down with the horizontal with a velocity of 25 m//s . If the stone strikes the water after 2.5 seconds then calculate the height of the bridge from the water surface (g=9.8 m//s^(2)) .

A stone is dropped freely from the top of a tower and it reaches the ground in 4 s. Taking g = 10 m s^(-2) , calculate the height of the tower.

A pebble is dropped freely in a well from its top. It takes 20 s for the pebble to reach the water surface in the well. Taking g = "10 m s"^(-2) and speed of sound = 330 "m s"^(-1) . Find the depth of water surface

A pebble is dropped freely in a well from its top. It takes 20 s for the pebble to reach the water surface in the well. Taking g = "10 m s"^(-2) and speed of sound = 330 "m s"^(-1) . Find the time when sound is heard after the pebble is dropped.

A stone is dropped into water from a bridge 44.1 m above the water. Another stone is thrown vertically downward 1 s later. Both strike the water simultaneously. What was the initial speed of the second stone?

A ball dropped from a bridge strikes the water in 5 s. Calculate the speed with which it strikes

A stone is dropped from roof of building takes 5 s to reach the ground. The sound of striking is heard after 5.4 second after the stone is dropped. The velocity of sound is

A body is dropped freely under gravity from the top of a tower of height 78.4 m. Calculate : (i) the time to reach the ground . Take g = 9.8 m s^(-2) .

A ship on the surface of water sends a signal and receives it back from a submarine inside water after 4 s. Calculate the distance of the submarine from the ship. (The speed of sound in water is 1450 m s^(-1) ).