As a rock slides from A to B along the inside of this frictionless hemispherical bowl, mechanical energy is conserved. Why prove this? (Ignore air resistance.). A- B A. The bowl is hemispherical. B. The normal force is balanced by centrifugal force. C. The normal force is balanced by centripetal force.

Q: How does conservation of energy explain why something that is falling should speed up? O It loses…

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Q: A person pulls a box with a uniform velocity over a surface. The kinetic frictional force between…

A: Explanation Power is defined as the work done per unit second. If W is the work done in time t then…

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Q: 8. An overhead garage door has two springs, one on each side of the door. A force of 15 pounds is…

A: According to Hooke's Law, The pull of an ideal spring is directly proportional to how far you pull…

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Q: A sled dog can accelerate a 250 kg sled from 0 m/s to 8.5 m/s in 8 s. (8 Points) a. How far will the…

A: (a) Sleg dog has traveled Xf= 34 m in that time. (b) work done W= 9031.25 Joules

Q: The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the…

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Q: A bag of wheat weight 320 kg .To what height should it be raised so that potential energy is 8460 J?…

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Q: Before: mI = 25.0 g mT = 25.0 g vI = 12.0 m/s East vT = 0 m/s After: mI = 25.0 g vI ' = 5.26 m/s @…

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Q: 38. Given four boxes of weights 8.00 N, 8.00 N, 2.00 N, and 9.00 N. There are three shelves of…

A: The weights of fours boxes,

Q: 2.- A winch that operates by means of electrical energy (see figure), drags a 2.0 kg box up a slope…

A: Mass of object is Speed is Coefficient of kinetic friction is Note:Find:Power applied by winch.

Q: At one point in its fall, a falling object has a kinetic energy of 5 J and a potential energy of 10…

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Q: (Could be more than one possible answer) Which of the following scenarios result in no work done in…

A: We know that work is done when a force acts through some distance d on object.

Q: 2. Two blocks initially at rest, each having a mass of 20 kg, are connected by a string as shown in…

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Q: 3. A 100-Kg block is being pulled up a slope by an electric motor as shown. Determine the power…

A: Given: The mass of the block is 100 kg. The velocity is 1.5 m/sec. The coefficient of friction is…

Q: Calculate the kinetic energy of the stone at the end of the 6-m frictionless inclined plane. A. -8…

A: By applying conservation of energy,  Kinetic Energy at bottom=Potential Energy at top Hence, Kinetic…

Q: 10. A system of 2 paint buckets, connected by a rope of negligible mass, is released from rest with…

A: Given Masses of two paint buckets are    m=8.0  kg M=5.0 kg Acceleration due to gravity is  g=9.80…

Q: 2. Why is it easier to climb a mountain via a zig-zag trail rather than to climb straight up? Do you…

A: In contrast to climbing straight up, which covers the shortest distance and has a greater…

Q: This is a potential energy graph as a function of position. You can also call the roller coaster…

A: Here we have the potential energy (U) v/s position (x) graph.

Q: A 63.0 kg skier approaches the foot of a hill with a speed of 15.0 m/s. The surface of this hill…

A: mass velocity Coefficient of kinetic friction Coefficient of static friction Angle

Q: A yacht used a cylindrical winder to unwind a cable to release an anchor. Using energy methods, what…

A: Force applied on the winder F=9 N, mass of the winder m=50 kg and radius of the winder r=0.06 m.…

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Q: A 2 200-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.40 m…

A: Given : Mass of a pile driver (m) = 2200 kg Height (h) = 3.40 m Distance (d) = 15.2 cm = 0.152 m…

Q: The work done on both masses is the same. The final velocity of both masses is the same.

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Q: 3. A 10.0-kg box is pulled by a horizontal wire in a circle on a rough horizontal surface for which…

A: Coefficient of friction        μ= 0.250 Mass (m) = 10 kg

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Q: An object moves in uniform circular motion. What is the reason the centripetal force does no work on…

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Q: 1. A 0.20-kg stone is held 1.3 m above the top edge of a water well and then dropped into it. The…

A: Given data-  Mass of stone m=0.20 kg  Height above the top edge of a water well h=1.3 m  Depth of…

Q: In which of the following situations would the capacity to do work be greatest? Note: Omega is…

A: The values of mass m , linear velocity v , moment of inertia I and angular velocity w is given  We…

Q: When a falling object reaches terminal speed, its kinetic energy reaches a constant value. However,…

A: According to conservation of energy, energy can be converted from one form to another. it can not be…

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Q: Consider a satellite in a circular orbit above Earth’s surface. In Chapter we will learn that the…

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Q: You are working on a design for a runaway truck ramp as indicated in the figure below. The hill is…

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Q: Find the work done in joules by gravity as an object of the mass m310 kg is raised up at constant…

A: Mass = 10 kg  Displacement = h2 - h 1 = 80m - 22 m =  58 m As we know Workdone  is given by W  Which…

Q: Three blocks with masses m1 = 4.31 kg, m2 = 8.73 kg, and m3 = 17.2 kg, respectively, are attached by…

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Q: A basketball is rolling down a hill. When you start watching it, it has a total energy of -11…

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Q: A conveyor belt of length 15.0 m is at 15⁰ with respect to the ground or horizontal. It can hold…

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Q: 125% + @ Problem 11: The atwood machine shown is released from rest. Using the work-energy theorem,…

A: CONCEPT: