Answer:
5.01 J
Explanation:
At the top of the cliff, the lemming has potential energy and kinetic energy.
When it lands, all the energy is converted to kinetic energy.
Final energy = Initial energy
KE = PE₀ + KE₀
KE = mgh + ½ mv₀²
KE = (0.0780 kg) (9.8 m/s²) (5.36 m) + ½ (0.0780 kg) (4.84 m/s)²
KE = 5.01 J
