Question

A polar bear runs at a speed of 11 m/s and has a mass of 380.2 kg. How much Kinetic energy does the bear have?

Answer 1

`\boxed{\sf Kinetic \ energy \ of \ the \ bear (KE) = 23002.1 \ J}`

Given:

Mass of the polar bear (m) = 6.8 kg

Speed of the polar bear (v) = 5.0 m/s

To Find:

Kinetic energy of the polar bear (KE)

Step-by-step explanation:

Formula:

`\boxed{ \bold{\sf KE = (1)/(2) m {v}^(2) }}`

Substituting values of m & v in the equation:

`\sf \implies KE = (1)/(2) * 380.2 * {11}^(2)`

`\sf \implies KE = \frac{1}{ \cancel{2}} * \cancel{2} * 190.1 * 121`

`\sf \implies KE = 190.1 * 121`

`\sf \implies KE = 23002.1 \: J`

`\therefore`

Kinetic energy of the polar bear (KE) = 23002.1 J