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Nataly [62]
3 years ago
11

An object moving forward at 10 m/s suddenly begins moving backward at 5 m/s. What is the most accurate explanation for this chan

ge?
a.The forces pushing the object forward became greater than the ones pushing the object back causing it to change direction.


b.The force pushing back on the object became greater than the force pushing the object forward.


c.The object was traveling in a straight line until it hit a brick wall and bounced backward.


d.The forces were ubalanced in the forward direction. Then they became balanced in the backward direction.
Physics
2 answers:
Vinil7 [7]3 years ago
8 0
My best guess would be C.
Nat2105 [25]3 years ago
6 0

Answer:

the correct answer is b

Explanation:

i took the test

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The maximum height a typical person can jump is about 60cm (0.6m). By how much does the gravitational potential energy increase
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The gravitational potential energy will increase by 423.36 J

<h3>How to determine the potential energy at ground level</h3>
  • Mass (m) = 72 kg
  • Acceleration due to gravity (g) = 9.8 m/s²
  • Height (h) = 0 m
  • Potential energy at ground level (PE₁) =?

PE = mgh

PE₁ = 72 × 9.8 × 0

PE₁ = 0 J

<h3>How to determine the potential energy at 60 cm (0.6 m)</h3>
  • Mass (m) = 72 kg
  • Acceleration due to gravity (g) = 9.8 m/s²
  • Height (h) = 0.6 m
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PE = mgh

PE₂ = 72 × 9.8 × 0.6

PE₂= 423.36 J

<h3>How to determine the change in potential energy </h3>
  • Potential energy at ground level (PE₁) = 0 J
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Change in potential energy = 423.36 - 0

Change in potential energy = 423.36 J

Learn more about energy:

brainly.com/question/10703928

#SPJ1

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