- #1
supernova1203
- 210
- 0
Homework Statement
45a)
A watermelon with a mass of 2 kg falls out of a tree house that is 5.4 m above the ground. What is the speed of the watermelon just before it hits the ground.
(this part i have solved)
mass = 2kg
Δd= 5.4m
v=?
v1^2 =v2^2+2gΔd
v1^2=0+2gΔd
=0+2(9.8)(5.4)
v1^2=√105.84
v1^2=10.28 m/s
Now on to the part i didnt quite get.
45b) A cantaloupe with a mass of 0.45kg falls out of the other side of the tree house. It hits a tree branch at a speed of 6.3 m/s. How high is the tree branch from the ground?
Homework Equations
v1^2 =v2^2+2gΔd
v1^2-v2^2/2g=Δd
The Attempt at a Solution
45b)
v1=0m/s
v2=6.3m/s
mass = 0.45 kg
v1^2-v2^2/2g=Δd
v1^2-v2^2/2g=Δd
6.3^2-0/2g=Δd
6.3^2/2(9.8)=Δd
6.3^2/19.6=Δd
39.69/19.6=Δd
2.025m = Δd
thats the height i got, if it is not correct, can someone show me how to get the right height? or better yet get the right height and i can analyze and figure out how you got the right height?