calculate the kinetic energy in joules of a body of mass 30g at a velocity of 3m/s
A bullet of mass 30g is moving at a velocity of 100ms calculate the kinetic energy
(1/2) m v^2 = (1/2)( 0.030)(3^2)
To calculate the kinetic energy (KE) of a body, you can use the following formula:
KE = 1/2 * m * v^2
Where:
m = mass of the body
v = velocity of the body
Given:
m = 30g = 0.03kg (since 1kg = 1000g)
v = 3m/s
Now, let's calculate the kinetic energy (KE):
KE = 1/2 * m * v^2
= 1/2 * 0.03kg * (3m/s)^2
= 1/2 * 0.03kg * 9m^2/s^2
= 0.135 Joules
Therefore, the kinetic energy of the body is 0.135 Joules.
To calculate the kinetic energy of a body, you can use the equation:
Kinetic Energy (KE) = 0.5 * mass * velocity^2
Here's how you can solve it step by step:
Step 1: Convert the mass of the body to kilograms.
Since the given mass is in grams, you need to convert it to kilograms by dividing it by 1000.
mass = 30g / 1000 = 0.03 kg
Step 2: Plug in the values into the equation.
velocity = 3 m/s
mass = 0.03 kg
KE = 0.5 * 0.03 kg * (3 m/s)^2
Step 3: Calculate the kinetic energy.
KE = 0.5 * 0.03 kg * (9 m^2/s^2)
KE = 0.135 Joules
Therefore, the kinetic energy of the body with a mass of 30g and a velocity of 3m/s is 0.135 Joules.