PHY 101L Module Four Lab Report Centripetal Force

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PHY101L

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Mechanical Engineering

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Feb 20, 2024

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PHY101L Module Four Lab Report Centripetal Force Name: Ashley Shaw Date: 02/02/24 Complete this lab report by replacing the bracketed text with the relevant information. Activities 2 and 3: Centripetal Force Data Table 1 Trial 1 2 3 4 5 # of Washers 1 2 3 4 5 Mass of Bag with Washers (g) 26.6g 52.0g 75.3g 100.7g 125.4g Mass of Bag with Washers (kg) 0.0266kg 0.052kg 0.0753kg 0.1007kg 0.1254kg Mass of Bobber (g) 8.7g Mass of Bobber (kg) 0.0087kg Radius (cm) 30cm Radius (m) 0.3m Circumference (m) 1.88m Time of 30 Revolutions (s) 19.72s 12.85s 11.55s 9.53s 8.25s Time of 1 Period (t) 0.66s 0.43s 0.39s 0.32s 0.28s Velocity (m/s) 2.85 4.37 4.82 5.88 6.71 Centripetal Force (m / r) 0.24 0.55 0.67 1.00 1.31 Weight of Washers 0.26 0.51 0.74 0.99 1.23 Percent Difference 7.7% 7.8% 9.5% 1.01% 6.5% Activities 1–3: Questions 1. In Activity 1, which way did the blue marble travel when the cup was removed? It traveled in a straight line from the point where I lifted the cup up. 2. You spun a bobber with a mass of 1 washers in the plastic bag, and one with a mass of 4 washers in the plastic bag. How does the velocity of the 1-washer bobber compare with the velocity of the 4-
washer bobber? Describe the relationship between the mass of the cylinder with the washers and the velocity of the bobber. The 1 washer bag velocity compares to the 4 washer velocity in that the 1 washers velocity was 2.85m/s and the 4 washers was 5.88m/s. A 48..5% difference. The greater the mass the higher the velocity needed to be to not weight the bag down while spinning it. 3. What do you notice about the relationship between the centripetal force and the weight of the bag of washers? Explain the reason for this relationship. The centripetal force was affected by the weight of the bag in that the greater the weight the grteater the centripetal force. Centripetal force is the force that keeps something in a circular path so the greater the mass the more force is required to keep it moving. 4. How will centripetal force be affected if you double the velocity at which you spin the bobber? The centripetal force would increase if I doubled the velocity. For example the bag with one washer its centripetal force was 0.24 with the calculated velocity, if I doubled that velocity its new centripetal force would be 0.94. It more than tripled the centripetal force. 5. What would you expect to happen to the velocity of the bobber if the mass of the washers in the bag remained the same and the radius was doubled? If we kept the mass of washers constant and doubled the radius we could expect the velocity to decrease. The centripetal force is inversely proportional to the radius, meaning the mass*v^2 is divided by the radius. The decrease would result because less centripetal force would be needed to move the object in its circular motion.
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