Practice Problems - Conservation of Mechanical Energy 1. A 1.00 kg pendulum bob is released from a height of 0.200 m. Its speed at the bottom of its swing is 1.95 m/s overcoming on the first pass. How much energy is lost due to friction during one complete swing of the pendulum? endulum, 2. A rope is hanging from the roof of the gymnasium. You are going to run at the rope, grab it, and see how high you are carried off the floor by the swinging rope. How fast must you run if you want to swing to a height of 1.5 m off the floor? Does your mass matter? Does the length of the rope matter? Discuss your answers. he force (the similar