How Do You Solve Projectile Motion Problems Without Specific Values?

[wonderlove_525]

Confused :( Can someone please help meee?

The height of an object above the ground at time t is given by
s = vo t - (g/2)t^2
where vo is the initial velocity and g is the acceleration due to gravity.

a) At what height is the object initially?
b) How long is the object in the air before it hits the ground?
c) When will the object reach its maximum height?
d) What is that maximum height?

I don't know how to attempt this question.. cause I haven't been given any numbers...

 

[dynamicsolo]

I don't know how to attempt this question.. cause I haven't been given any numbers...

You aren't explicitly given any numbers, so you have to interpret what the conditions are for each question. For the first one, it asks what the initial height of the object is. What is the time (t = ?) initially? (That is, when do we start counting from?)