Answer:
b) 3.72m/s²
c) 9.33*10^5
d) 9.33*10^5
e) 11.85 hrs
Explanation:
a) to confirm that gEarth is about 98 m/s².
Let's use the formula:
= 9.78 m/s²
=> 9.8m/s²
b) Given:
r = 2106 miles
=3.72 m/s²
c) we use:
d) Let's take the force of gravitybon earth due to satellite as our answer in (c) because the Earth's gravitational force on a GPS satellite and the force of gravity on a GPS satellite on earth are equal and opposite (two mutual forces).
e) In a circular motion,
Gravitional force = Centripetal force.
Solving for v, we have
v = 3886m/s
Therefore,
v = 2πR/T
Solving for T, we have:
T = 42650seconds
Convert T to hours
T = 42650/60*60
T = 11.86hrs
Answer:
A) Must be done 19806.62 joules of work.
B) The average power is 1320.44 Watts.
Explanation:
A) First, we're going to use the work-energy theorem that states total work (
) done on an object is equal to the change in its kinetic energy (
):
(1)
So, all we must do is to find the change on kinetic energy. Because we're working with rotational body, we should use the equation 
for the kinetic energy so:
(2)
with 
the initial angular velocity, 
the final angular velocity (is zero because the wheel stops) and I the moment of inertia that for a thin hoop is 
, using those on (2)
(3)
By (3) on (1):
B) Average power is work done divided by the time interval:
NOTE: We use the relation 
to convert 280 rev/min(rpm) to 29.32 rad/s
They're a medium (c) of communication
A. mediation is what you so when you want to bring the sides of conflict together
b. is a person who is advocating something
d. is a presentation of some opinion or facts.
Here, Your Options are absent, but the elements that would most likely become a positive ion will be:
hydrogen, sodium, potassium, lithium, cesium etc.
Hope this helps!
