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gayaneshka [121]
3 years ago
15

We have to use either of these formulas

Physics
1 answer:
sasho [114]3 years ago
6 0

Answer:

646,000 m/s²

Explanation:

Given:

Δx = 0.840 m

v₀ = 0 m/s

v = 521 m/s

Find: a

v² = v₀² + 2aΔx

(521 m/s)² = (0 m/s)² + 2a (0.840 m)

a ≈ 646,000 m/s²

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Car A has twice the mass of Car B; both travel at the same speed. Compared to Car B. Car A has:
krek1111 [17]

Answer:

Car A has twice the energy of car B.

Explanation:

The kinetic energy of an object is given by :

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Where

m is the mass

v is the speed of the object

Car A has twice the mass of Car B. Both travel at the same speed i.e.

m_A=2m_B

So,

\dfrac{K_A}{K_B}=\dfrac{(1/2)m_Av^2}{(1/2)m_Bv^2}\\\\=\dfrac{2m_B}{m_B}\\\\\dfrac{K_A}{K_B}=2\\\\K_A=2\times K_B

So, the kinetic energy of car A is twice of the kinetic energy of car B.

4 0
3 years ago
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ANSWER

My answer is in the photo above

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What distance will be traveled if you are going 120km/hr for 30 min? steps please
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D= Speed x Time
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