Explain in detail when work done is positive and work done is negative and under what circumstances (if any) is no work done (zero) on a moving object even though a net force acts on it? 2. One sometimes speaks of the "direction of time", evolving from past to future. Does this mean that time is a vector quantity? Explain your reasoning. 3. The acceleration of a certain moving object is constant in magnitude

Q: 20. An object of mass 3.00 kg is subject to a force Fx that varies with position as in the Figure.…

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Q: 1. Two forces that are F, = 1ON and F,= 5 N act on a body in a frictionless floor. If the…

A: Since there are multiple questions posted, we will answer the first question for you. If you want…

Q: If a force of 36 N stretches a spring 0.3 m beyond its natural length, how much work does it take to…

A: Force (F)=36 N DISPLACEMENT(X)=0.3m first, we will find the spring constant(k) using F=-kx and then…

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Q: Directions: Fill out everything for each problem. Write neatly! 1) A unicorn suddenly ran through…

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Q: Newton's law of universal gravitation is represented by F= G* Mm/ T where F is the gravitational…

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Q: A certain spring whose normal length is 42 cm is stretched 6.3 cm by a force of 18 N. How much work…

A: Given Data: The normal length is, L =42 cm. The stretch is, x = 6.3 cm. The force required is, F =…

Q: Suppose that during each step, the leg of the student, which is 0.90 meters long, swings through a…

A: Length of leg, L=0.9 mtotal swing=d= 2 mtime of foot rest=t=0.2 sec

Q: Part A You apply a constant force F = (-68,.0 N)î + (36.0 N)ĵ to a 430 kg car as the car travels…

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Q: a.) Evaluate the dot product of the pair of vectors in (Figure 1). A⋅B= b.) Evaluate the dot…

A: (a) Find the dot products of the pair of vectors in figure 1. A→·B→=ABcosθ=35cos40°=11.5 (b) Find…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.