1. Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that we can discover. ~Bertrand Russell

2. A block of mass m slides with speed v on a frictionless surface. It collides with an ideal spring and compresses it 10 cm before momentarily stopping. What is the max compression if the same mass has speed 2v initially? What is the max compression if a mass of 2m collides at speed v? A] 5 cm B] 10 cm C] 14.1 cm D] 20 cm E] 40 cm C

3. A car accelerates from a stop as the engine delivers constant power. Is the acceleration greater at the beginning or at the end? A] Beginning B] End C] Acceleration is the same, since power is.