What is the KE of a 9 kg mass at 2 m/s?
To calculate the kinetic energy (KE) of an object, you can use the formula:
KE = (1/2) * mass * velocity^2
Given that the mass is 9 kg and the velocity is 2 m/s, we can plug these values into the formula to find the kinetic energy.
KE = (1/2) * 9 kg * (2 m/s)^2
First, let's find the velocity squared:
(2 m/s)^2 = 2 m/s * 2 m/s = 4 m^2/s^2
Now, let's calculate the kinetic energy:
KE = (1/2) * 9 kg * 4 m^2/s^2
Simplifying further:
KE = 18 kg m^2/s^2
The unit for kinetic energy is joules (J), which is equivalent to kg m^2/s^2. So, the kinetic energy of a 9 kg mass at 2 m/s is 18 joules.
Therefore, the KE of the 9 kg mass at 2 m/s is 18 joules.