7. Find the value of current 11 which is flowing in the circuit given below. Find the value by using Kirchhoff's rules. 1₁ 30 Ω 20 92 80 V 1₁ 20 V 13 2002 1₂
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- 3. Consider the gravitational force field F with G = m = M = 1 in 3D with the potential function being F(x, y, z) = 1 (√x² + y² + z²)³ 3 (—x, —y, —z). Show that the work done by the gravitational force as a particle moves from (x₁, y₁, 2₁) to (x2, Y2, 72) along any path depends only on the radii R₁ = √√x² + y² + z² and R₂ = x² + y² + z ².Question: Three identical 5.6 kg spheres are located at 3 of the 4 corners (top left, top right, and bottom right) of a square whose sides are 2.8 m in length. How much work must be done on the gravitational field produced by the spheres in order to remove the top right sphere (place it at infinity)? Assume that the 2 spheres that are left behind (top left, bottom right) remain located on opposite corners of the square. A) 1.50 x 10-9 J B) 5.34 x 10-10 J C) 1.89 x 10-10 J D) 2.67 x 10-10 J E) 5.29 x 10-10 J OA E B. C.11
- Can you help me?m A person is pushing a wooden crate of mass mo = 20 kg at a constant speed vo = 1.2– for Ax = 3 m along a rough horizontal floor that has a coefficient of friction µk = .4.on s page During normal gait a person 1.94m tall swings their leg from 89 degrees hip extension to 37 degrees hip flexion. Calculate the curvilinear distance traveled by their toes to 3 decimal places. N Answer: U J M 8 W 1 K 9 N O O PS ? [ prt sc pause USD/EUR +0.56% # home 7 Next page A 18:20 04/12/2023 8 □ 5 2 €
- 92. For a satellite in a circular orbit around the earth, the gravitational force from the earth on the satellite causes the centripetal acceleration. The amount of work done by the gravitational force from the earth on the satelliteA) is zeroB) is greater than zero.C) is less than zero.D) would be different if the masses of the earth and satellite were different.E) can’t be determined without a calculator and some data.i. Prove your answer by using the formula for work, W: (Hint: Consider just a short segment of the orbit, rather than the full revolution.) ii. Prove your answer by talking about the satellite’s kinetic energy, ∆?� ***also please do it i,ii and write a process detail.2) What is the work done by the force of gravity Fg ? A. F dcos(0) B. F dcos(90) C. F dcos(180") D. F dcos(270) F. 3)
- (5) Calculate work needed to take a pixel 6 phone from the surface of the Earth to infinity. Google needed constants and parameters.2. For a satellite in a circular orbit around the earth, the gravitational force from the earth on the satellite causes the centripetal acceleration. The amount of work done by the gravitational force from the earth on the satellite A) is zero B) is greater than zero. C) is less than zero. D) would be different if the masses of the earth and satellite were different. E) can't be determined without a calculator and some data. i. Prove your answer for #2 by using the formula for work, W: (Hint: Consider just a short segment of the orbit, rather than the full orbit. Draw and label on the diagram above to support your work.) ii. Prove your answer for #2 by talking about the satellite's kinetic energy, AKE: (Do not use your work from part i to answer part ii–give a separate proof in part ii.)1. When a car goes around a turn at constant speed, how much work is done by the centripetal force? Justify your answer.