3. Three students make measurements (in m) of the length of a rod using a meter stick. Each student's measurements are tabulated in the table below. Using your calculator in statistic mode calculate the mean L, standard deviation S and uncertainty u of the measurements. Student L₁ Student 1 1.4717 Student 2 1.4753 Student 3 1.4719 L₂ 1.4711 1.4759 1.4723 L3 1.4722 1.4756 1.4705 L4 1.4715 1.4749 1.4719 ī 1.4716 1.4754 11.4716 SD 0.000397 ±0.000.397 0.000370 ± 0.000370 10.000685 £0.000685 u Note that the actual length of the rod is determined by a laser measurement technique to be 1.4715 m (this should be considered the standard value). a) State how one determines the accuracy of a measurement. Apply your idea to the measurements of the three students above and state which student has the most accurate measurement.

Step # 1 F, 31 F. 21 45 Q, Using the superposition principle find the magnitude and the direction of the resultant force on Q1. Describe step #1 Your answer

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A soccer ball is kicked from point P, at an angle above a horizontal field. The ball follows an ideal path before landing on the field at point P. Ball P Horizontal field P, 12. On the diagram below, draw an arrow to represent the direction of the net force on the ball when it is at position X. Label the arrow F [Neglect friction.] Y Ball Pi Horizontal field P, 13. On the diagram above, draw an arrow to represent the direction of the acceleration of the ball at position Y. Label the arrow a. [Neglect friction.]

I need help with a University Physics 1 (Scalars & Vectors) - The problem is described in the image below:

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Solve part c and d

Let A = 4î – 2ĵ, B = −3î + 5ĵ, and Ē = 2A +3B. Part A Write vector E in component form. Express your answer in terms of the unit vectors i and j. Use the 'unit vector' button to denote unit vectors in your answer. VE ΑΣΦ E Submit Request Answer ?

1. Write the formula for finding the magnitude of the force given its rectangular components. 2. How is the direction angle of the force measured? 3. How is the reference angle 4. Why does the line of action of the resultant R need to pass through the common point of a given concurrent force system? computed?