The mass of a ball is 20g and its height is 8m, calculate the kinetic energy when it has a velocity of 2m/s.
The formula for kinetic energy is KE = 1/2mv^2, where m is the mass of the object, and v is the velocity.
Plugging in the given values, we get:
KE = 1/2(0.02kg)(2m/s)^2
KE = 0.02J
Therefore, the kinetic energy of the ball is 0.02 Joules.