Question

How much Kinetic Energy does a 731.8 kg race car have when it is traveling 91 m/s across a 120 m tall bridge?

Answer 1

3030017.9 J

Step-by-step explanation

Kinetic energy is the energy of an object due to its motion - not its position. It is given by the equation,

`KE=(1)/(2)\cdot m\cdot v^2`

In this case, the mass of the race car is 731.8 kg, and its velocity is 91 m/s, so its kinetic energy is,

`KE=(1)/(2)\cdot731.8kg\cdot(91m/s)^2=3030017.9J`

Hence, the kinetic energy of the race car is 3030017.9 Joules.