Part One: Linear Collisions and Conservation of Momentum /4 1. a. Use the numbers provided in the tables below to calculate the missing values then answer the questions that follow. Assume three significant digits. Object Mass Initial Final Change Initial Final Change in (kg) V in v momentum momentum momentum (m/s) (m/s) (m/s) (kg.m/s) (kg.m/s) (kg.m/s) blue 2.00 6.00 2.00 green 4.00 0.00 2.00 Object Mass Initial Final Change Initial Final Change in (kg) V in v momentum momentum momentum (m/s) (m/s) (m/s) (kg-m/s) (kg.m/s) (kg.m/s) blue 2.00 6.00 1.50 green 6.00 3.00 4.50 b. Determine the impulse on the green mass in table 2. /1/1 c. Use unit analysis to show how the unit for impulse is the same as the unit for momentum. /2 2. Explain how a hockey player can increase the impulse on a puck to complete a slap shot. 13 3. Object A, with a mass of 2.0 kg, is travelling to the right at 15.0 m/s. Object B, with a mass of 12.5 kg, is also travelling at 15.0 m/s, but to the left. If the two objects stick together upon impact, what is the final velocity of the system? 4. A 250-g firecracker explodes into two pieces. The first piece has a mass of 97 g and flies off to the right at 16 m/s. a) What is the velocity of the second piece? /3/1 b) What physics principle did you use to solve this? Hint: see data sheet for list of physics principles. /2 5. Object A, initially travelling to the right, collides with object B, which is at rest. After the collision, object A moves back to the left and object B remains at rest. Neglecting friction, is this possible? Explain. /2 6. An object is travelling to the right and collides with another object that is at rest. After the collision, both objects travel to the right, but at different speeds. Neglecting friction, is this possible? Explain.1. Use the data to calculate the missing quantities, and fill in your answers. /4 object Mass Initial v Final v Initial Final Initial Final (kg) (m/s) (m/s) momentum momentum kinetic kinetic energy energy (kg-m/s) (kg.m/s) red 5.0 + 8.0 0.0 green 5.0 0.0 + 8.0 object Mass Initial v Final v Initial Final Initial Final (kg) (m/s) (m/s) momentum momentum kinetic Kinetic energy energy (kg.m/s) (kg-m/s) red 5.00 +6.00 - 1.00 green 7.00 0.0 +5.00 2. Answer the following questions using the data collected in the collision tables from question one a. Is momentum conserved in each collision? /1 b. Is kinetic energy conserved in each collision? 43. Using the data in the table below and the percent loss formula below % loss = Initial energy-final energy x 100% initial energy a) Determine the percentage of kinetic energy lost for each collision. (2 marks) /2 Collision Elasticity Initial Final Per cent loss kinetic kinetic energy (J) energy (J) in kinetic energy 1 100% 90 90 2 76% 90 68 3 54% 90 49 20% 90 18 b) The Law of Conservation of Energy states energy is neither created nor destroyed. /1 Explain what happens to the energy lost in the table above. (1 mark) /2 4. Describe the mathematical relationship between elasticity and the percent loss in kinetic energy. Compare two data points from the above table in your reasoning.5. A ballistic pendulum experiment is shown in the diagrams below. The ball has a mass of 0.200 kg and the wooden block has a mass of 1.000 kg. Use the data in the diagrams to do appropriate calculations to determine if the collision is elastic or inelastic. The values in cm represent the height each object is lifted to. Before: . Ball pendulum is released, striking block pendulum After: Ball pendulum rebounds . Block pendulum responds to impact 1.50 cm 0.10 cm /5