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Eduardwww [97]
3 years ago
5

Why is gravity an example of scientific theory?

Physics
2 answers:
liq [111]3 years ago
4 0
-- The theory of gravity gives a good explanation for things
that we see happening.

-- The theory of gravity predicts things that turn out to be true
when we test them.

-- Nobody has come up with a different theory that explains things better
and makes more accurate predictions that the theory of gravity does.

-- The theory of gravity can't be proved.
yarga [219]3 years ago
4 0
Sir Isaac Newton made up the law of gravity. This involved using the scientific theory.
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Compare the initial mass to the final mass.
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There is no vegetation present within the alpine biome.
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A 45kg skater and a 60kg skater are standing still, holding hands on frictionless ice. They push away from each other in opposit
frutty [35]

Answer:

The 60 kg skater is traveling at 2.63 m/s in the opposite direction from the 45 kg skater.

Explanation:

The velocity of the 60 kg skater can be found by conservation of linear momentum:

P_{i} = P_{f}

m_{a}v_{i_{a}} + m_{b}v_{i_{b}} = m_{a}v_{f_{a}} + m_{b}v_{f_{b}}  (1)

Where:

m_{a}: is the mass of the first skater = 45 kg        

m_{b}: is the mass of the second skater = 60 kg        

v_{i_{a}}: is the initial speed of the first skater = 0 (he is standing still)

v_{i_{b}}: is the initial speed of the second skater = 0 (he is standing still)

v_{f_{a}}: is the final speed of the first skater = 3.5 m/s

v_{f_{b}}: is the final speed of the second skater =?

By replacing the above values into equation (1) and solving for v_{f_{b}} we have:

0 = m_{a}v_{f_{a}} + m_{b}v_{f_{b}}

v_{f_{b}} = \frac{-m_{a}v_{f_{a}}}{m_{b}} = \frac{-45 kg*3.5 m/s}{60 kg} = -2.63 m/s

The minus sign is because the 60 kg skater is moving in the opposite direction from the other skater.

Therefore, the 60 kg skater is traveling at 2.63 m/s in the opposite direction from the 45 kg skater.

I hope it helps you!

4 0
3 years ago
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