Calculate the kinetic energy in joules of a body of mass 30kg at a velocity of 3ms-1
100
The kinetic energy (KE) of an object can be calculated using the formula:
KE = (1/2) * mass * velocity^2
Given:
Mass (m) = 30 kg
Velocity (v) = 3 m/s
Substituting these values into the formula:
KE = (1/2) * 30 kg * (3 m/s)^2
Simplifying:
KE = (1/2) * 30 kg * 9 m^2/s^2
KE = 135 joules
Therefore, the kinetic energy of the body is 135 joules.
To calculate the kinetic energy of a body, you can use the formula:
Kinetic Energy = 1/2 * mass * velocity^2
Now, let's use this formula to find the kinetic energy in joules for a body with a mass of 30 kg and a velocity of 3 m/s.
Step 1: Write down the given values:
Mass (m) = 30 kg
Velocity (v) = 3 m/s
Step 2: Plug the values into the formula:
Kinetic Energy = 1/2 * 30 kg * (3 m/s)^2
Simplify the formula:
Kinetic Energy = 1/2 * 30 kg * 9 m^2/s^2
Step 3: Calculate the result:
Kinetic Energy = 1/2 * 30 kg * 9 m^2/s^2
= 15 * 9 m^2/s^2
= 135 J
So, the kinetic energy of the body is 135 joules.