Answer:
a. L =3.465 J.s
b. 3.186 rad/s
c. T = 1.972 s
d. Lp = 0.022 J.s; up or down, depending on the direction of L
Explanation:
(a)We have the formula for angular momentum as
L = I*w where I = moment of inertia = 
L = 
(b) ω = M*g*D/L
where D = L/2 = 0.96/2 = 0.48m
ω = (23* 0.48/3.465) rad/s = 3.186 rad/s
(c) T = 2π/ω
T = 2*π/3.186 s = 1.972 s
(d) Lp = 
Solving with mass M, D and angular velocity ω
Lp = 0.022 J.s; up or down, depending on the direction of L
Answer:
The time he can wait to pull the cord is 41.3 s
Explanation:
The equation for the height of the skydiver at a time "t" is as follows:
y = y0 + v0 · t + 1/2 · g · t²
Where:
y = height at time "t".
y0 = initial height.
v0 = initial velocity.
t = time.
g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).
First, let´s calculate how much time will it take for the skydiver to hit the ground if he doesn´t activate the parachute.
When he reaches the ground, the height will be 0 (placing the origin of the frame of reference on the ground). Then:
y = y0 + v0 · t + 1/2 · g · t²
0 m = 15000 m + 0 m/s · t - 1/2 · 9.8 m/s² · t²
0 m = 15000 m - 4.9 m/s² · t²
-15000 m / -4.9 m/s² = t²
t = 55.3 s
Then, if it takes 4.0 s for the parachute to be fully deployed and the parachute has to be fully deployed 10.0 s before reaching the ground, the skydiver has to pull the cord 14.0 s before reaching the ground. Then, the time he can wait before pulling the cord is (55.3 s - 14.0 s) 41.3 s.
This matter spread out around theuniverse with no structure. But each little bit of matter exerted the force of gravity on each other little bit. Gravity is the only type of force connected with <span>the Big Bang as it is a basic force that was to create our world in th way we can see and discover it today.</span>
The Answer is D
Because you add all of them to equal 9 atoms
Fc=mv^2/r so we get
2000kg*(25m/s)^2/(80m)= 15625N of force
hope this helps! Thank You!!