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A 1,000 kg ball traveling at 5 m/s would have kinetic energy. A 10 kg ball traveling at 5 m/s would have kinetic energy. A 100 kg person falling at 5 m/s would have kinetic energy.

Sagot :

Question : 1

  • mass (m) = 1000 kg
  • velocity (v) = 5 m/s

=》

[tex]k.e = \dfrac{1}{2}mv {}^{2} [/tex]

=》

[tex]k.e = \dfrac{1}{2} \times 1000 \times (5) {}^{2} [/tex]

=》

[tex]k.e = 500 \times 25[/tex]

=》

[tex]k.e = 12500 \: joules[/tex]

kinetic energy = 12500 joules

Question : 2

  • mass (m) = 10 kg
  • velocity (v) = 5 m/s

=》

[tex]k.e = \dfrac{1}{2} mv {}^{2} [/tex]

=》

[tex]k.e = \dfrac{1}{2} \times 10 \times ({5})^{2} [/tex]

=》

[tex]k.e = 5 \times 25[/tex]

=》

[tex]k.e = 125 \: joules[/tex]

kinetic energy = 125 joules

Question : 3

  • mass = 100 kg
  • velocity = 5 m/s

=》

[tex]k.e = \dfrac{1}{2} mv {}^{2} [/tex]

=》

[tex]k.e = \frac{1}{2} \times 100 \times (5) {}^{2} [/tex]

=》

[tex]k.e = 50 \times 25[/tex]

=》

[tex]k.e = 1250 \: joules[/tex]

kinetic energy = 1250 joules

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