Sunday
April 19, 2015

Homework Help: Calculus/Physics

Posted by Elisabeth on Thursday, July 8, 2010 at 10:32pm.

A stone is thrown from a cliff top with an upward velocity of 20 m/s. It takes 7 seconds for the stone to hit the ground at the bottom of the cliff. How high is the cliff?

I know you use the equation of motion
S(t)= (So)+(Vo)t-(1/2)gt^2
S(20)= (So) + 140 - 240.1
(So) = -100.1 m (I know it is supposed to be a positive number)
But doesn't that give you the total height? How do I get rid of the height of the parabola above the cliff?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - a physics book is thrown horizontal at a velocity of 10.0m/s from the ...
physics for physical science - A stone thrown vertically upwards with a speed ...
physics - A stone is thrown horizontally at a speed of 4.8 m/s from the top of a...
physics - A stone is thrown horizontally with an initial speed of 10 m/s from ...
Physics ?#2 - A ball is dropped from the top of a 53.0m high cliff. At the same ...
physics - 9. A stone is thrown at an angle of 30 above the horizontal from the...
Physics - A stone is thrown horizontally from the top of a 25.00 m cliff. The ...
physical science - a stone is thrown horizontally at a speed of 5.o m/s from the...
Physics - If it takes 2.37 seconds for a stone to hit the ground from a cliff. (...
physics - 3)A soldier throws a grenade horizontally from the top of a cliff. ...

Members