Answer:
I don't understand what exactly you're asking, but this statement is true.
Explanation:
Mechanical energy = Potential Energy + Kinetic Energy
if there is no friction, M.E. is conserved
as a ball falls, it is losing height. (P.E.=mgh , therefore P.E. will decrease)
the potential energy is transformed into kinetic energy which equals 1/2MV^2.
the increase in K.E. equals the decrease in P.E.
and the sum of both equals M.E.
thus mechanical energy is conserved.
hope this helps you.
Answer:
you have patience the distance.
Explanation:
the train leaves at 6.30.
Answer:
none of the answers is correct, the time is the same t₁ = t₂ = 0.600 s
Explanation:
This is a kinematics exercise, analyze the situation a bit. The vertical speed in both cases is the same is zero, the horizontal speed in the second case is double (vₓ₂ = 2 vₓ₁)
let's find the time to hit the ground
y = y₀ + I go t - ½ g t²
0 = y₀ - ½ g t²
t = √ 2y₀ / g
with the data from the first launch
y₀i = ½ g t²
y₀ = ½ 9.8 0.6²
y₀ = 1,764 m
with this is the same height the time to descend in the second case is the same
t₂ = 0.600 s
this is because the horizontal velocity change changes the offset on the x axis, but does not affect the offset on the y axis
Therefore, none of the answers is correct, the time is the same
t₁ = t₂ = 0.600 s
