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Home Question Bank Physics Archive 2025 January 19

Physics Questions from Jan 19,2025

Browse the Physics Q&A Archive for Jan 19,2025, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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Irom the ground. Shuw ALL calculations. Explain why the rope and pulley system will be less effective if the distance \( \mathbf{x} \) between the pulleys is increased. Tarzan ( \( \mathrm{m}=85.0 \mathrm{~kg} \) ) tries to cross a river by swinging from a \( 10.0-\mathrm{m} \)-long vine. His speed at the bottom of the swing (as he just clears the water) is \( 8.00 \mathrm{~m} / \mathrm{s} \). Tarzan doesn't know that the vine has a breaking strength of \( 1000 . \mathrm{N} \). 0) A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached t No poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the iddle of the span 2.5 cm 3.0 cm 4.0 cm 5.0 cm Rangkaian seri R-L-C dihubungkan dengan sumber arus bolak-balik yang memiliki frekuensi angular \( 2.500 \mathrm{rad} / \mathrm{s} \). Jika diketahui nilai \( \mathrm{R}=600 \Omega, \mathrm{~L}=0,5 \mathrm{H} \), dan \( \mathrm{C}=4 \mu \mathrm{~F} \), nilai impedansi rangkaian sebesar.. \( \Omega \) \( \begin{array}{ll}\text { A. } 650 & \text { D. } 750 \\ \text { B. } 800 & \text { E. } 1.200 \\ \text { C. } 1.250 & \end{array} \) If two equal forces of magnitude P act at an angle \( 9^{\circ} \), their resultant will be Problem 2.47: For vectors \( \vec{B}=-\hat{\imath}-4 \hat{\jmath} \) and \( \vec{A}=-3 \hat{\imath}-2 \hat{\jmath} \) calculate (a) \( \vec{A}+\vec{B} \) and its magnitude and direction angle, and (b) \( \vec{A}-\vec{B} \) and its magnitude and direction angle. You pull a rope to the left with 300 N and a friend pulls the rope to the right with 425 N . (Don't forget about relative size of vectors) 1.1. Draw a vector diagram for the two forces acting on the rope. 1.2. Use (one dimensional) vector addition to find the resultant vector. (Show work) 1.3. What is the magnitude and direction of the resultant vector? 2. You sail a boat due east at \( 25 \mathrm{~m} \cdot \mathrm{~s}^{-1} \). The wind is blowing the boat due north at \( 10 \mathrm{~m} . \mathrm{s}^{-1} \). 2.1. Draw a vector diagram of the velocities of the boat. 2.2. Use (two dimensional) vector addition to find the resultant vector. (Show work) What is the magnitude and direction of the resultant vector? 2.3. - Determinar el módulo de elasticidad de un solenoide al cual se le aplica un esfuerzo de 900 N y se deforma 35 cm Dado \( m=0.5, v_{1}=10, v_{2}=40 \), y \( t=3 \), evalúa \( F=\frac{m v_{2}-m v_{1}}{t} \) Exercise 10: Two identical metal spheres carry charges \( q_{1}=8 \times 10^{-5} \mathrm{C} \) and \( \mathrm{q}_{2}=-4 \times 10^{-5} \mathrm{C} \). They are put in contact; then, they are separated. Determine the final charge carried by each sphere.
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