# A missile is flying at a speed of 125 m/s

## Question on a missile is flying at a speed of 125 m/s

A missile is flying at a speed of 125 m/s. If the missile has a mass of 125 kilograms, what’s its kinetic energy? Keep 4 significant figures.

The answer to the question is 976,562.5 and approximately 976,600 when we rounded it to 4 significant figures.

#### Method of Calculation

Data

We will start by extracting our data from the question.

The speed of the missile, v = 125 m/s

Mass of the missile, m = 125 kg

Unknown

The kinetic energy of the missile, K.E = ?

Formula

We will apply the formula below to calculate the kinetic energy of the missile

Kinetic energy, K.E = (1/2)mv2

##### Solution

Substitute the formula with the data extracted from the question

Kinetic energy, K.E = (1/2)mv2 = (0.5) x 125 x 1252

Therefore,

K.E = 0.5 x 125 x 15,625 = 976,562.5 Joules

Therefore, the kinetic energy of the missile is 976,600 in 4 significant figures.

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