What is the kinetic energy of a 18 kg dog that is running at a speed of 8.7 m/s (about 19 mi/h)?
as always, KE = 1/2 mv^2
so plug in your numbers...
To find the kinetic energy of an object, you can use the following formula:
Kinetic energy (KE) = 1/2 * mass * velocity^2
In this case, the mass of the dog is given as 18 kg, and its velocity is given as 8.7 m/s. So, substitute these values into the formula to calculate the kinetic energy:
KE = 1/2 * 18 kg * (8.7 m/s)^2
First, calculate the square of the velocity:
(8.7 m/s)^2 = 75.69 m^2/s^2
Now substitute this value into the formula and multiply by half of the mass:
KE = 1/2 * 18 kg * 75.69 m^2/s^2
Simplifying,
KE = 679.11 kg•m^2/s^2
The unit of kg•m^2/s^2 is also known as Joules (J). Therefore, the kinetic energy of the dog is approximately 679.11 Joules.