Answer:
The kinetic energy of Mary is 20 Joules
Explanation:
Given
Mass = 40 kg
Velocity = 1 m/s
Required
Calculate the kinetic energy.
The kinetic of any body is calculated by using the following formula.
K.E = ½mv²
Where K.E represent kinetic energy
m represent the mass of the body
v represent the velocity of the body.
To solve the kinetic energy, in this case, we simply substitute 40kg for m and 1m/s for v.
This gives us
K.E = ½ * 40 * 1²
K.E = ½ * 40 * 1
K.E = 0.5 * 40
K.E = 20
Hence, the kinetic energy of Mary is 20 Joules