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Phantasy [73]
2 years ago
15

The equation below can be used to calculate a change in gravitational potential energy. What units must be used for h? Give the

full name, not the abbreviation.
e=m x g x h
Physics
1 answer:
Anni [7]2 years ago
8 0

Answer:

h = change in vertical position (height)

has units of distance.

Explanation:

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We are given the following information:

y₁ = 3 m

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Use a constant acceleration equation:

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3 = y₀ − 4.9 t₁²

Evaluated at point 2:

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0.6 = y₀ − 4.9 t₂²

Solve for y₀ in the first equation and substitute into the second:

y₀ = 3 + 4.9 t₁²

0.6 = (3 + 4.9 t₁²) − 4.9 t₂²

0 = 2.4 + 4.9 (t₁² − t₂²)

We know t₂ = t₁ + 0.4:

0 = 2.4 + 4.9 (t₁² − (t₁ + 0.4)²)

0 = 2.4 + 4.9 (t₁² − (t₁² + 0.8 t₁ + 0.16))

0 = 2.4 + 4.9 (t₁² − t₁² − 0.8 t₁ − 0.16)

0 = 2.4 + 4.9 (-0.8 t₁ − 0.16)

0 = 2.4 − 3.92 t₁ − 0.784

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t₁ = 0.412

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3 = y₀ − 4.9 t₁²

3 = y₀ − 4.9 (0.412)²

3 = y₀ − 0.83

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