A stone is dropped into a well in which the level of water is h below the top of the well. If v is velocity of sound, the time T after which the splash is heard is given byT = 2h/v

A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s−2 and speed of sound = 340 m s−1.

a stone is dropped into a well is heard to strike the water after 4 seconds. Find the depth of the well if the velocity of the stone is 350 metre/second

6 The water surface in a deep well is 78.0 m below the top of the well. A person at the top of thewell drops a heavy stone down the well.Air resistance is negligible. The speed of sound in the air is 330 m s –1.What is the time interval between the person dropping the stone and hearing it hitting the water?A 3.75 s B 3.99 s C 4.19 s D 4.22 s7 Which statement is not a requirement of a pair of forces that obey Newton’s third law of motion?A The forces act in opposite directions.B The forces act on different objects.C The forces act on objects in contact.D The forces are of equal magnitude.

A stone is dropped from the top of an overhead water tank and at the same time another stone is thrown vertically upwards from the ground level with a velocity of 20 ms^-1. If the stones met exactly 2 seconds after their release, determine the height of the overhead tank.

We know that the stone's velocity was −152 ft/s when it hit the ground. Therefore, since v(t) = −32t, the time when the stone hit the ground wast = s.