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3 years ago

A bat hasa mads of 2kg at the velocity of 45 m/s what is the kinectic energy could he give to a ball

Physics

1 answer:

il63 [147K]3 years ago

8 0

Answer:

the kinetic energy the bat can give to a ball is 2,025 J.

Explanation:

Given;

mass of the bat, m = 2kg

velocity of the bat, v = 45 m/s

The kinetic energy the bat can give to a ball is calculated as;

$K.E = \frac{1}{2} mv^2\\\\K.E = \frac{1}{2} \times \ 2 \ \times \ 45^2\\\\K.E = 2,025 \ J$

Therefore, the kinetic energy the bat can give to a ball is 2,025 J.

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3 years ago

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castortr0y [4]

Answer:

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Explanation:

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In order to do the division above, we will divide the whole numbers normally, then we will apply the law of indices to the power that says:

Xᵃ ÷ Xᵇ = X⁽ᵃ⁻ᵇ⁾

$\therefore time = \frac{6.1 \times 10^{18}}{3 \times 10^8}\\= \frac{2.03 \times 10^{(18-8)}}{1} \\= 2.03 \times 10^{10}}\ seconds$

Next, we are told that there are 3.2 × 10⁷ seconds in a year.

∴ The number of years travelled by the light from the star:

$3.2\ \times 10^7\ seconds = 1\ year\\1\ second = \frac{1}{3.2\ \times 10^7} \\\therefore 2.03 \times 10^{10}\ seconds = \frac{2.03 \times 10^{10}}{3.2\ \times 10^7}$

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2.03 × 10¹⁰ = 20300000000

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The closest answer in the option is 635 years, and we are short of this by some points due probably to approximations in the calculation.

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