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Paraphin [41]
2 years ago
15

1. A ball with a mass of 2.3 kg travels with a velocity of 10 m/s. What is it's kinetic energy?

Physics
1 answer:
monitta2 years ago
7 0

Answer:

KE=½mv²

KE=½2.3kg×(10m/s)²

KE=½2.3kg×100m²/s²

KE=2.3kg×50m²/s²

KE=115joules

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The repulsive force between two protons has a magnitude of 2.00 N. What is the distance between them?
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Answer:

The answer to your question is letter A.     r = 1.07 x 10⁻¹⁴ m

Explanation:

Data

F = 2 N

d = ?

q = 1.6 x 10 ⁻¹⁹ C

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Formula

                 F = K\frac{q1q2}{r^{2}}

Solve for r

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Substitution

                r = \sqrt{\frac{8.987 x 10^{9}x1.6 x 10^{-19} x 1.6 x 10x^{-19}}{2}}

Simplification

                r = \sqrt{\frac{2.3 x 10^{-28}}{2}}

                r = \sqrt{1.15 x 10^{-24}}

Result

                r = 1.07 x 10⁻¹⁴ m

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