Question

The speed of a motorcycle is 5 m/s and it has a mass of 550 kg. Calculate its kinetic energy.

Answer 1

KE= 6,875 J.

Step-by-step explanation:

1. Let's refer to the kinetic energy formula from physics.

Formula:
`KE=(1)/(2) mv^(2)`

2. Identify the given values.

Speed(v)= 5m/s

Mass(m)= 550 kg

3. Substitute in the equation by the given values and calculate.

`KE=(1)/(2) (550kg)(5m/s)^(2)\\ \\KE=(275kg)(25(m/s)^(2))\\ \\KE=6875kg*(m^(2) )/(s^(2) )`

According to the definition of energy units, we can rewrite the final answer as the following:

`KE=6875J`

J stands for "joules", unit of energy (check the attached image).