You have been asked to design a “ballistic spring system” to measure the speed of bullets. A spring whose spring constant is k is suspended from the ceiling. A block of mass M hangs from the spring. A bullet of mass m is fired vertically upward into the bottom of the block and stops in the block. The spring’s maximum compression d is measured.
a. Find an expression for the bullet’s speed vB in terms of m, M, k, and d.
b. What was the speed of a 10 g bullet if the block’s mass is 2.0 kg and if the spring, with k = 50 N/m, was compressed by 45 cm?
Week 12 Notes Carbohydrates -no nutrients -4 calories per gram -waste: carbon dioxide and water -short term energy and storage Proteins -needed for amino acids -4 calories per gram -nitrogenous waste -used to build tissues and enzymes -provide energy -no storage Lipids -needed for fatty acids -9 calories per gram -used for energy and long-term storage Process of eating 1. Ingestion 2. Digestion 3. Absorption 4. Elimination Gastrovascular cavity input and output are the same Majority of animals have a complete digestive tract -digestive tract can be compartmentalized and specialized -food going in one whole and out a different hole aids in efficiency ability to continuously eat Large animals tend to be generalists (except koalas and anteaters just had to be rebels and go ag