Asked by MSM
Q: a freely falling object requires 1.50s to travel the last 30.0m before it hits the ground . From what height above the ground did it fall ??
Pleazzzz help ....
Pleazzzz help ....
Answers
Answered by
drwls
Let H be the height from which it is dropped. Let T be the time it takes to hit the ground. Solve these two simultaneous equations:
H = (1/2) g T^2
H-30 = (1/2) g (T-1.5)^2
By subtracting equations, H can be eliminated immediately:
30 = 1.5 g T - (1/2) g (1.5)^2
Solve for T first, then compute H.
H = (1/2) g T^2
H-30 = (1/2) g (T-1.5)^2
By subtracting equations, H can be eliminated immediately:
30 = 1.5 g T - (1/2) g (1.5)^2
Solve for T first, then compute H.
Answered by
Diana
t= 2.79 H=38.1
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