Question

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.

Answer 1

Question : 1

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

=》

`k.e = (1)/(2)mv {}^(2)`

=》

`k.e = (1)/(2) * 1000 * (5) {}^(2)`

=》

`k.e = 500 * 25`

=》

`k.e = 12500 \: joules`

kinetic energy = 12500 joules

Question : 2

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

=》

`k.e = (1)/(2) mv {}^(2)`

=》

`k.e = (1)/(2) * 10 * ({5})^(2)`

=》

`k.e = 5 * 25`

=》

`k.e = 125 \: joules`

kinetic energy = 125 joules

Question : 3

• mass = 100 kg
• velocity = 5 m/s

=》

`k.e = (1)/(2) mv {}^(2)`

=》

`k.e = (1)/(2) * 100 * (5) {}^(2)`

=》

`k.e = 50 * 25`

=》

`k.e = 1250 \: joules`

kinetic energy = 1250 joules