A pebble is dropped down a well and hits the water 1.5 seconds later. using the equations for motion with constant acceleration, determine the distance from the edge of the wall to the water's surface.

Question

Physics

Conor Mitchell

27 July, 21:23

A pebble is dropped down a well and hits the water 1.5 seconds later. using the equations for motion with constant acceleration, determine the distance from the edge of the wall to the water's surface.

+5

Answers (1)

Know the Answer?

Hayley Banks · Answer 1

Let h = the distance from the edge of the wall to the water surface (m).

Use g = 9.8 m/s² and neglect air resistance.

The initial vertical velocity of the pebble is zero.

Because the pebble hits the surface of the water after 1.5 s, therefore

h = (1/2) * (9.8 m/s²) * (1.5 s) ² = 11.025 m

Answer: 11.025 m