Where is earth's magnetic north pole located?
2 answers:
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Answer:
The force of gravitational attraction between the satellite and Earth is newtons.
Explanation:
Statement is incorrect. Correct statement is:
<em>A satellite (</em><em>) travels in orbit around the Earth at a distance of </em>
<em> above Earth's surface. What is the force of gravitational attraction between the satellite and Earth?</em>
The gravitational force experimented by the satellite (), in newtons, is calculated by Newton's Law of Gravitation, whose equation is defined by following formula:
(1)
Where:
- Gravitational constant, in cubic meters per kilogram-square second.
- Mass of the satellite, in kilograms.
- Mass of the Earth, in kilograms.
- Distance of the satellite with respect to the center of the Earth, measured in meters.
If we know that ,
,
and
, then the force of gravitational attraction between the satellite and Earth is:
The force of gravitational attraction between the satellite and Earth is newtons.
Answer:
a) 24 J
b) Gravitational Force
c) 45 J
d) 0
e) 6.782m/s
Explanation:
a) m = 3kg
v = 4m/s
h = 1.5m
KE = ?
0.5 * 3 * 16 = 24J
b) Gravitational force
c) F = ma = 3 * 10 = 30N
Work done = Force * distance = 30 * 1.5 = 45J
d) Final Kinetic Energy of the ball is zero because the ball eventually stops moving
e) velocity of ball as it strikes the ground = v
where
v is the velocity as it strikes the ground
u is the initial velocity
a is acceleration
s is the distance
Now since the ball is thrown downwards, a is positive because the velocity of the ball is increasing as the gravitational force acts on it
u = 4m/s
a = 10
s = 1.5
=>
=
=