Physics 20 Lab Format Each student must hand in his or her own write up. Results can be shared. This is the common format for any physics lab. Anybody reading your lab should be able to understand it and perform the experiment without any other reference. Name__________ Partner(s)_______ Title Purpose: Materials: Procedure: Results: Questions: Conclusion: Marking: Format/Neatness - /5 Each question – /2 Conclusion - /2 Ph. 20 Lab 1 Accelerated Motion Purpose: To investigate the uniform acceleration of an object. Materials: Stop watch Two meter sticks Marble Procedure: 1. Bring the two meter sticks close together to form a groove. Raise one end of the grooved track just enough for the marble to start rolling without a push. 2. Measure the time that the ball takes to roll 40 cm, 50 cm, 60 cm, 70 cm, 80 cm, and 90 cm. Measure the time at least 3 times for each distance and take the average. 3. Determine the average speed for each distance – use vave = d/t. 4. Draw a speed-time graph and find the slope of the graph. Results: You can place your data in a suitable table. Questions: 1. What is the slope of your graph? What does the slope represent? 2. What happens in uniform acceleration? 3. Why bother with acceleration? Why not just use speed to describe motion? 4. Explain the meaning of 3 m/s2. 5. A car slows down from 25 m/s to rest in 6.1 s. a) Calculate its acceleration. b) What does the minus sign mean?