Question

A car is going at a speed of 25m/s when the driver puts her foot on the gas pedal. The carfeels a net force of 2000N for 50m. The car's mass is 1000kg.How much kinetic energy does the car have initially?

Answer 1

Answer:

The initial kinetic energy of the car = 312.5 kJ

Step-by-step explanation:

The initial volume of the car, v = 25 m/s

The mass of the car, m = 1000 kg

The initial kinetic energy is given by the formula

`\begin{gathered} KE=(1)/(2)mv^2 \\ \end{gathered}`

Substitute m = 1000 kg, and v = 25 m/s into the formula

`\begin{gathered} KE=(1)/(2)*1000*25^2 \\ KE=500*625 \\ KE=312500J \\ KE=312.5kJ \end{gathered}`

The initial kinetic energy of the car = 312.5 kJ