Supposing velocity is speed and direction, and momentum is mass*velocity, if the velocity increases by a factor of 5, then so should the momentum regardless of the whole space thing.
<span>The statement : According to the law of conservation of energy, the total amount of energy in the universe does not change, but remains constant - is TRUE. The main point which led me to decide is that our universe is the example of a closed system which means there's nothing inside. Hope you will agree with my opinion.
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911.1×155.9 = 14,202.49
14,202.49 in 3 significant figures would be either 14,200 or 1.42×10^4
Answer:
v₂ = 5131.42 m/s
Explanation:
given,
radius of the planet = r₁ = 9.00×10⁶ m
mass of the satellite = m₁ = 68 Kg
orbital radius = r₁ = 8 x 10⁷ m
orbital speed = v₁ = 4800 m/s
mass of second satellite = m₂ = 84.0 kg
orbital radius = r₂ = 7.00×10⁷ m
orbital speed of second satellite = v₂ = ?
using orbital speed of satellite

so,

now,


v₂ = 5131.42 m/s
The orbital speed of second satellite is equal to v₂ = 5131.42 m/s
Answer:
a) 4.1 J
b) -14 J
c) 4.8 m/s
Explanation:
The energy stored in the spring is given by:

The mechanical energy loss is because of the work done by the friction force.
The friction force (only presented on the inclined surface) is given by:


We need to calculate the length of the ramp in order to calculate the work, the length of the ramp is the hypotenuse:

So the work done by the friction force is:

the angle is 180 degrees because the force is opposite to the motion.
In order the know the final velocity we need to apply the Energy Conservation Theorem:
