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3 years ago

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s isJ.

Physics

1 answer:

inysia [295]3 years ago

3 0

We know,

K.E. = 1/2 mv²

K.E. = 1/2 (0.5)(10)²

K.E. = 1/2 * 50

K.E. = 25 Kgm/s

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Answer:

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Explanation:

Given that,

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$n_{r}\sin\theta_{i}=n_{a}\sin\theta_{r}$

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Using Snell's law,

$n_{b}\sin\theta_{i}=n_{a}\sin\theta_{b}$

Put the value into the formula

$1.587\sin37=1\times\sin\theta_{b}$

$\theta_{b}=\sin^{-1}(\dfrac{1.587\sin37}{1})$

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