I have problems that i need solved as fast as possible and dont know what to do. please send answeres quick
A 57kg trampoline artist jumps vertically upward from the top of a platform with a speed of 4.7m/s. How fast is he going as he lands on the trampoline 3.8m below?
A 124g baseball is dropped from a tree 11.6m above the ground. With what speed would it hit the ground if air resistance could be ignored?
3 answers
I just did the first on below.
second one
Again the mass does not matter
(1/2) m v^2 = m g h
v = sqrt (2 g h)
(remember that)
Again the mass does not matter
(1/2) m v^2 = m g h
v = sqrt (2 g h)
(remember that)
1. V^2 = Vo^2 + 2g*h = 0,
4.7^2 + (-19.6)h = 0,
h = 1.127 m. above the platform.
3.8 + 1.127 = 4.93 m. above gnd.,
V^2 = Vo^2 + 2g*h = 0 + 19.6*4.93 = 96.57,
V = 9.83 m/s.
2. V^2 = Vo^2 + 2g*h = 0 + 19.6*11.6 = ,
V = ?.
4.7^2 + (-19.6)h = 0,
h = 1.127 m. above the platform.
3.8 + 1.127 = 4.93 m. above gnd.,
V^2 = Vo^2 + 2g*h = 0 + 19.6*4.93 = 96.57,
V = 9.83 m/s.
2. V^2 = Vo^2 + 2g*h = 0 + 19.6*11.6 = ,
V = ?.
1 answer