Question

Determine the apple's kinetic energy, KE, the gravitational potential energy of the system, gravity, and the total mechanical energy of the system, E, when the apple's height above the ground is 3.0 m

Answer 1

7.45

Step-by-step explanation:

At 3.0 m PE = m*g*3.0, KE = m*g*(4.0 - 3.0)

At 2.0 m PE = m*g*2.0, KE = m*g*(4.0 - 2.0)

At 3.0 m PE = m*g*1.0, KE = m*g*(4.0 - 1.0)

At 0 m PE = 0, KE = m*g*h = total energy = 7.45 J