physics
posted by LALAINE .
A STONE IS DROPPED FROM A CLIFF SOME HIGH. DISREGARDING AIR RESISTENCE, (a) HOW LONG DOES IT TAKE THE STONE TO REACH THE GROUND? (b) WHAT IS ITS SPEED WHEN IT STRIKE THE AROUND?

physics 
drwls
You need to provide numbers like the cliff height. "Some high" won't cut it.
Please turn off your caps lock. It is like being yelled at. 
physics 
tchrwill
I assume you are looking for a general expression for the time it takes an object to fall from a cliff of height "h".
From h = Vot + gt^2/2
where H = the height of the cliff
Vo = the initial velocity = 0
g = acceleration due to gravity and t = the time of the fall.
Solving for t yields
t = sqrt(2h/g).
Choose your "h" and you have the time of the fall. 
physics 
nadia
h=100m t=200/9.8= 20.408 sec.
Respond to this Question
Similar Questions

physical science
a stone is thrown horizontally at a speed of 5.o m/s from the top of a cliff 78.4 m high. How long does it take the stone to reach the bottom of the cliff? 
physics
a physics book is thrown horizontal at a velocity of 10.0m/s from the top of a cliff 78.4 m high. a). how long does the stone take to reach the bottom of the cliff? 
calculus
A stone is dropped from the upper observation deck (the space deck) of the CN Tower, 450m above the ground. (a) How long does it take the stone to hit the ground? 
physics
A stone is thrown horizontally at a speed of 4.8 m/s from the top of a cliff 88.5 m high. How long does it take the stone to reach the bottom of the cliff? 
Calculus
A stone is dropped from the upper observation deck of a tower, 200 m above the ground. (Assume g = 9.8 m/s^2.) a)Find the distance (in meters) of the stone above ground level at time t. b)With what velocity does it strike the ground? 
Physics
A stone is thrown straight upward with a speed of 12 m/s from the edge of a 70 m high cliff. How long is the stone in the air? 
Physics
. A stone is dropped from the top of a building that is 500m high. Disregarding air resistance how long does it take the stone to reach the ground? 
physics
A stone is dropped from a cliff 100 ft. high. Disregarding friction; a. how long does it take the stone to hit the ground? 
physics
a stone is dropped from a cliff 100 ft high .disregarding friction; a.how long does it take the stone to hit the ground b.With what speed and direction does it strike the ground? 
physics
a stone is thrown vertically upward at a speed of 10 m/s from a cliff that is 95m high. How long will it take the stone to reach the bottom?