What is the kinetic energy of a 29 kg dog that is running at a speed of 7.9 m/s (about 18 mi/h)?
KE= 1/2 m v^2
m = 29 kg
v = 7.9 m/s
To calculate the kinetic energy of an object, you can use the formula:
Kinetic Energy (KE) = 1/2 * mass * velocity^2
In this case, the mass of the dog is given as 29 kg and its velocity is 7.9 m/s.
Plugging in these values into the formula:
KE = 1/2 * 29 kg * (7.9 m/s)^2
To solve this, you can follow these steps:
1. First, square the velocity term:
(7.9 m/s)^2 = 62.41 m^2/s^2
2. Multiply the squared velocity by 1/2:
KE = 1/2 * 29 kg * 62.41 m^2/s^2
3. Multiply the mass and squared velocity:
KE = 29 kg * 62.41 m^2/s^2
4. Compute the final result:
KE ≈ 18013.89 Joules
So, the kinetic energy of the 29 kg dog running at a speed of 7.9 m/s is approximately 18013.89 Joules.