in order to find the depth of a well, you drop a stone into it and time its fall. it hits the water after falling for 1.7s. the depth of the well is about

To determine the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. If the time is 4.0 s, what is the height of the bridge?

A rock is thrown from a bridge 18 m above water with an initial speed of 15.5 m/s. Assuming negligible air resistance, what is the speed that the rock hits the water with, in meters per second?

A bullet is fired through a board 14.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. The initial speed of the bullet is 580 m/s and it emerges from the other side of the board with a speed of 480 m/s. What is acceleration of the bullet as it passes through the board and total time the bullet is in contact with the board.

A rocket is launched upward. The height of the rocket was 82.9 ft at the end of the thrust and had a velocity of 128.2 ft/s. The acceleration of gravity (g = 32.2 ft/s2), What is the maximum height of the rocket?

You drop a stone down a well that is 7.26m deep. How long is it before you hear the splash? The speed of sound in air is 316.4m/s and air resistance is negligible.

Julie, mass 36kg, has invented a new ride called the Human Launcher. It is basically a platform that springs people straight up into the air. She is testing it, standing on a bathroom scale on the platform. As the platform springs 10.0m upward from rest, Julie notices the scale reads 600.0N. Once it reaches ground level, the platform suddenly stops, but Julie doesn't, and is launched up into the air. What is the maximum height above the ground that Julie will reach? (the ride was deemed unsafe and cancelled) *= nut 10.0m ground

An explosion causes debris from the ground to rise vertically with an initial velocity of 160 feet per second. What is the speed of debris when the height is 300 feet?

The NEXT morning, you wake up in a strange room yet again, and this time you drop a ball from a height of 1.54 m above the floor. The ball hits the floor 0.392 s after your drop it. You guess that you must have been taken to an alien planet with gravity different from Earth s. What is this planet s g (that is, the magnitude of the acceleration due to gravity on this planet)?     10.0 m/s^2     15.0 m/s^2     30.0 m/s^2     20.0 m/s^2

The NEXT morning, you wake up in a strange room yet again, and this time you drop a ball from a height of 1.40 m above the floor. The ball hits the floor 0.160 s after your drop it. You guess that you must have been taken to an alien planet with gravity different from Earth s. What is this planet s g (that is, the magnitude of the acceleration due to gravity on this planet)?     54.7 m/s^2     82.1 m/s^2     207.9 m/s^2     109.4 m/s^2