The child has kinetic energy (KE) because she's moving, and gravitational potential energy (GPE) because she's off the ground.
KE = 1/2mv²
KE = 1/2 (20 kg)(5 m/s)²
KE = 50 J
Ug (gravitational potential energy) = mgy
Ug = (20)(9.8)(2) = 392 J
- R3KTFORGOOD ☕