1. Warmup Dec 3
Show how to convert from pounds (lb) to Newtons (N). What is the single number you end up multiplying by to get from lb to N in one step?

2. Warmup: Dec 5
Many mountain roads are built so that they zigzag up the mountain rather than go straight up toward the peak. Discuss the advantages of such a design from the viewpoint of energy conservation and power.
Recall our definition of power:
Power = Work/time

3. Work and Power Work – Energy Transfer Equation for work: W = F d
Units of work: Joules (J)
Power – Rate of Energy Transfer
Equation for power:
P = W/t
Units of power: Watts (W)
Power/746 W = hp

4. Warmup: Dec 6
Write the equation for momentum and kinetic energy: p = mv and KE = (1/2)*mv2
If an object is not moving, what is its momentum?
If a particle’s kinetic energy is zero, what is its momentum?
If two particles have equal kinetic energies, do they have the same momentum? Explain.