A model of the solar system with the sun in the middle
Answer:
3494444444.44444 J
-87077491.39453 J
Explanation:
M = Mass of Earth = 
G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²
R = Radius of Earth = 
h = Altitude = 
m = Mass of satellite = 629 kg
v = Velocity of spacecraft = 
The kinetic energy is given by

The spacecraft's kinetic energy relative to the earth is 3494444444.44444 J
Potential energy is given by

The potential energy of the earth-spacecraft system is -87077491.39453 J
Answer:
The right answer is "18 m/s".
Explanation:
The given values are:
Velocity,
V = 6 m/s
Tension,
T = 9 N
As we know,
⇒ 
On substituting the given values, we get
⇒ 
⇒ 
⇒ 
⇒ 
Now,
For 81 N the velocity will be:
⇒ 
⇒ 