help- word problem

[kelsey2014]

A stone is thrown straight up from the edge of a roof, 775 feet above the ground, at a speed of 16 feet per second.
A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 6 seconds later? .
Don't forget to enter the correct units.
B. At what time does the stone hit the ground? .
C. What is the velocity of the stone when it hits the ground?

 

[mmm4444bot]

What have you done so far, on this exercise ?

Have you learned the formula for the height of objects in freefall ?

 

[kelsey2014]

i don't believe so. or i dont remember. i thought the equation would be -32t^2+16t+775. but it doesn't work out

 

[galactus]

The coefficient of the t^2 term should be -16, not -32

That is because \(\displaystyle \frac{1}{2}gt^{2}\)

 

[Deleted member 4993]

A stone is thrown straight up from the edge of a roof, 775 feet above the ground, at a speed of 16 feet per second.
A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 6 seconds later? .
Don't forget to enter the correct units.
B. At what time does the stone hit the ground? .
C. What is the velocity of the stone when it hits the ground?

Is this aproblem from Math class or Physics class?