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BlackZzzverrR [31]
4 years ago
7

What is the potential energy of a 2kg hammer which is 0.4 meter up

Physics
1 answer:
Daniel [21]4 years ago
8 0

Answer:8joules

Explanation:

Potential energy=mass×acceleration due to gravity×height

Potential energy=2×10×0.4

Potential energy=8joules

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A 3.0 kg ball moving at 8 m/s to the right collides with a 1.0 kilogram ball at rest. After the collision, the 3
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Let m₁ = 3.0 kg and v₁ = + 8 m/s (so right is positive), and m₂ = 1.0 kg and v₂ = 0. The total momentum of the two balls before and after collision is conserved, so

m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'

where v₁' = + 5 m/s and v₂' are the velocities of the two balls after colliding, so

(3.0 kg) (8 m/s) = (3.0 kg) (5 m/s) + (1.0 kg) v₂'

Solve for v₂' :

24 kg•m/s = 15 kg•m/s + (1.0 kg) v₂'

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v₂' = (9 kg•m/s) / (1.0 kg)

v₂' = + 9 m/s

which is to say, the second ball is given a speed of 9 m/s to the right after colliding with the first ball.

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3 years ago
What type of data do scientists use to predict tornadoes?
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Correct answer would be d
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3 years ago
When the blood flows through the capillary bed, most of the plasma will return to the heart through the venules. What happens to
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The answer is the 2nd sentence.
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A laser with wavelength d/8 is shining light on a double slit with slit separation 0.500 mm. This results in an interference pat
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Answer:

0.000109375 m

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4 years ago
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