SOLUTION: an apple falls from a tree. It hits the ground at a speed of about 5 m/s what is approximate height of the tree? Why?
A) 1.2 b) 2.5 c) 2.4
Algebra.Com
Question 896850: an apple falls from a tree. It hits the ground at a speed of about 5 m/s what is approximate height of the tree? Why?
A) 1.2 b) 2.5 c) 2.4
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
an apple falls from a tree. It hits the ground at a speed of about 5 m/s what is approximate height of the tree? Why?
A) 1.2 b) 2.5 c) 2.4
---------------------
9.8 m/sec/sec is commonly used as the rate for gravitational acceleration on Earth. Sometimes 10 is used.
No units are given for the choices. I'll assume they're meters, tho I should not have to make any assumptions.
-----
v = a*t (velocity = acceleration * time)
5 = a*t
5 = 9.8t
t = 5/9.8 =~ 0.51 seconds falling
---
s = at^2/2 = 9.8*(5/9.8)^2/2 = 4.9*t^2
s =~ 1.2755 meters
===================
A very poorly stated problem.
RELATED QUESTIONS
An apple falls from a tree and hits the ground in 2 seconds.How fast was it going right... (answered by ikleyn)
A tree is broken off at a height of 5 m from the ground and its top touches the ground at (answered by josgarithmetic)
Sid wants to find the height of a tree without having to climb it, but it is a cloudy... (answered by ikleyn)
A light shines toward the ground from the top of a building wall that is 40 ft
high. A... (answered by MathLover1)
An apple falls from a tree that is 28m high. How long does it take for it to hit the... (answered by ikleyn)
At a point on the ground 15 ft from a base of a tree,the distant to the top of the tree... (answered by macston)
At a point on the ground 35 ft from the base of a tree, the distance to the top of the... (answered by nerdybill)
At a point on the ground 15ft from the base of a tree, the distance to the top of the... (answered by nyc_function)
At a point on the ground 70 ft from the base of a tree, the distance to the top of the... (answered by stanbon)