What is the kinetic energy of a 20 kg dog that is running at a speed of 7.3 m/s (about 16 mi/h)?
To calculate the kinetic energy of an object, you need to use the formula:
Kinetic Energy (KE) = 1/2 * mass * velocity^2
In this case, the mass of the dog is given as 20 kg, and the velocity is given as 7.3 m/s. Plug these values into the equation:
KE = 1/2 * 20 kg * (7.3 m/s)^2
First, square the velocity:
KE = 1/2 * 20 kg * (53.29 m^2/s^2)
Next, calculate the product of the mass and the squared velocity:
KE = 1/2 * 20 kg * 53.29 m^2/s^2
Finally, multiply the product by 1/2 to get the final answer:
KE = 530.9 J (Joules)
Therefore, the kinetic energy of the 20 kg dog running at a speed of 7.3 m/s is 530.9 Joules.
The formula for kinetic energy is KE = 1/2 * mass * velocity^2.
Given:
mass = 20 kg
velocity = 7.3 m/s
Substituting the values into the formula:
KE = 1/2 * 20 kg * (7.3 m/s)^2
Simplifying:
KE = 1/2 * 20 kg * 53.29 m^2/s^2
Calculating:
KE = 532.9 J (joules)
Therefore, the kinetic energy of the 20 kg dog running at a speed of 7.3 m/s is approximately 532.9 joules.
K.E. = (1/2) M V^2
Do the numbers. The answer will be in Joules