1. A 1.00 kg pendulum bob is released from a height of 2.00 m. Its speed at the bottom of its swing is 1.95 m/s on the first pass. [2 marks] a. How much energy is lost due to friction on the way to the bottom of the swing of the pendulum? b. How efficient is the pendulum in transferring GPE to KE?

2. A 12.0 kg mass is dropped from a height onto a spring that compresses and stops the mass. The ball has dropped from a height of 15.0 m before it hits the spring. The spring recoils and the mass is thrown upward. [3 marks]

a. How high would the ball go if 200.0 J of energy were converted to heat during the entire interaction?

b. What is the efficiency of this spring?

c. When fully compressed, the spring stores 2000.0 Joules of Energy. What is the maximum mass that can be projected to a height of 18.0 m?