Thread: suvat question help

I don't know how to work out the problems for this question :/ i've tried for a while now...

A rock is thrown vertically down from a roof of a 25.0 m high building with a speed of 5m/s.

a) When does the rock hit the ground?
b) With what speed does it hit the ground? (Take acceleration due to gravity to be 10.0 m/s/s

Thanks

Originally Posted by silverfalcon

I don't know how to work out the problems for this question :/ i've tried for a while now...

A rock is thrown vertically down from a roof of a 25.0 m high building with a speed of 5m/s.

a) When does the rock hit the ground?
b) With what speed does it hit the ground? (Take acceleration due to gravity to be 10.0 m/s/s

Thanks

for part (a) ...





solve for


for part (b), use the value of determined in part (a) ...