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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?

Respuesta :

Answer:

The initial kinetic energy of the car = 312.5 kJ

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

[tex]\begin{gathered} KE=\frac{1}{2}mv^2 \\ \end{gathered}[/tex]

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

[tex]\begin{gathered} KE=\frac{1}{2}\times1000\times25^2 \\ KE=500\times625 \\ KE=312500J \\ KE=312.5kJ \end{gathered}[/tex]

The initial kinetic energy of the car = 312.5 kJ

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