Posted by **Tashanna** on Monday, July 16, 2007 at 1:39pm.

A rock is thrown vertically up from the ground with a velocity of 24 meters per second, and it reaches a height of 2+24t-4.9tsquare after t secounds.

A. How many seconds after the rock is thrown will it reach its maximum height?

B.What is the maximum height the rock will reach, in meters?

C. How many seconds after the rock is thrown will it hit the ground?

It will reach the max height after 2.45 secs.

You can find the max height by differentiation and setting it to zero. ie. 24 -9.8 t = 0 and solve for t to be 2.45 secs.

Then use 2.45 in the equation to find the max height to be 2 + 24 *2.45 + 4.9 (2.45)(2.45) = 90.21 meters.

It will hit the ground in 2.45 * 2 secs = 4.90 secs

## Answer This Question

## Related Questions

- math - on earth, in the absence of air, the rock in excersise 13 would reach a ...
- algebra - Rock is thrown from the top of a building. The formula h=-16t+234 ...
- Math - A rock is thrown upward from a bridge that is 88 feet above a road. The ...
- physics - A rock is dropped from a treetop 19.6 m high, and then, 1.00 s later, ...
- Physics - A rock is thrown vertically upward with a speed of 11.0 from the roof ...
- math - a rock is thrown straight up in the air from an initial height of ho, in...
- Calc - If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, ...
- PHYSICS - A rock is thrown vertically upward with a speed of 14.0m/s from the ...
- physics - A rock is thrown vertically upward with a speed of 14.0 m/s from the ...
- Physics - A rock is thrown directly upward from the edge of the roof of a ...

More Related Questions