What is the kinetic energy of a 15 kg dog that is running at a speed of 8.9 m/s (about 20 mi/h)?
To find the kinetic energy of an object, you can use the equation:
Kinetic Energy (KE) = 1/2 * mass * velocity^2
In this case, the mass of the dog is given as 15 kg, and the speed at which it is running is 8.9 m/s.
To calculate the kinetic energy, substitute the values into the equation:
KE = 1/2 * 15 kg * (8.9 m/s)^2
First, square the velocity:
(8.9 m/s)^2 = 79.21 m^2/s^2
Then, multiply the squared velocity by the mass:
KE = 1/2 * 15 kg * 79.21 m^2/s^2
Next, calculate 1/2 multiplied by the product of the mass and velocity squared:
KE = 0.5 * 15 kg * 79.21 m^2/s^2
Finally, compute the result:
KE = 5928.75 J (joules)
Therefore, the kinetic energy of the 15 kg dog running at a speed of 8.9 m/s is approximately 5928.75 joules.