Answer:
4 s
-24.5 m/s
Explanation:
y = y₀ + v₀ t + ½ at²
v = at + v₀
where y is the final position,
y₀ is the initial position,
v₀ is the initial velocity,
a is the acceleration,
and t is time.
Given:
y = 0 m
y₀ = 19.6 m
v₀ = 14.7 m/s
g = -9.8 m/s²
Find: t, v
Substitute values into the first equation and find t:
y = y₀ + v₀ t + ½ at²
0 = 19.6 + 14.7 t + ½ (-9.8) t²
0 = 19.6 + 14.7 t − 4.9 t²
0 = t² − 3 t − 4
0 = (t − 4) (t + 1)
t = -1 or 4
Since t must be positive, t = 4 seconds.
Now use the second equation to find v:
v = at + v₀
v = (-9.8) (4) + 14.7
v = -24.5
Answer:
Explanation:
strike-slip, normal and thrust
mark her as brainiest, :) I don't need it :P
<span>The bullfrog is sitting at rest on the log. The force of gravity pulls down on the bullfrog. We can find the weight of the bullfrog due to the force of gravity.
weight = mg = (0.59 kg) x (9.80 m/s^2)
weight = 5.782 N
The bullfrog is pressing down on the log with a force of 5.782 newtons. Newton's third law tells us that the log must be pushing up on the bullfrog with a force of the same magnitude. Therefore, the normal force of the log on the bullfrog is 5.782 N</span>
Answer:The energy in fossil fuels (coal, oil, gas)
Explanation:
