Sunday

March 29, 2015

March 29, 2015

Posted by **melissa** on Monday, May 16, 2011 at 4:42pm.

A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds

a) how high above the water is the cliff ( The maximum height is relative to water level )

b) what is the ' second zero' and what does it mean

- math -
**Henry**, Tuesday, May 17, 2011 at 6:23pma. h + 30 = Vo + 0.5gt^2.

h + 30 = 0 + 0.5*9.8*5^2,

h + 30 = 122.5,

h = 122.5 - 30 = 92.5m. above the wate.

b. I'm not sure what they mean by "zeroes", but the inital velocity

is zero at the beginning of the free fall which is 30m above the top of the

cliff.

**Answer this Question**

**Related Questions**

math - i really need help, i have no idea how to answer this question ! A stone ...

math - really need help, i have no idea how to answer this question ! A stone ...

math help please !!! - i really neeed help, i have no idea how to answer this ...

Math - A stone was thrown from the top of a cliff. The height, H meters, of the...

math - A ball is thrown into the air with an upward velocity of 20 ft/s. Its ...

calculus - Wiley jumps straight up in the air from the edge of a cliff so that ...

Math help - A catapult launches a boulder with an upwark velocity pf 184 feet ...

Tulane Physics - a rock is thrown unward off a cliff at a 45 degree angle. THe ...

Word problem - . A catapult launches a boulder with an upwark velocity pf 184 ...

Math - A ball is thrown straight up from a bridge over a river and falls into ...