Work And Energy True or False 1. True or False Only the net force acting on an object can do work. True or False If a particle remains at rest, then we can conclude that there is no work done on it. 3. True or False A force that is perpendicular to the velocity of the object is not doing work to the object. 4. True or False The force that causes the acceleration of an object following a circular path at a constant speed does work on the object.

Q: Consider a situation where a constant force of 25 N acts on an object having a mass of 2 kg for 3…

A: Given Data: Constant Force F=25 N Mass of object M=2 kg Duration of force t=3 sec

Q: Energy Wer and 100 apply a constant force F = (-680 N) + (601) 380 kg car as the car travels 48.0 m…

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Q: (a) The roof of a large arena, with a weight of 250 kN, is lifted by 11 cm so that it can be…

A: Weight of the roof (F) = 250 kN.Lifted distance (d) = 11 cm. = 0.11 m.

Q: The force exerted on any object is F = F(E- 1) a) Find the work done in displacing the object from x…

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Q: In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using…

A: Mass of the object m = 281.5 kg distance lifted d = 17.1 cm = 0.171 m

Q: A rope is tied to a box and used to pull the box 1.6 m along a horizontal floor. The rope makes an…

A: Given: The length of the horizontal floor is 1.6 m. The rope angle with horizontal is 30°. The…

Q: Problem 3: The force F = (6.55 N)i + (5.79 N)j acts on a particle as it moves along a straight line…

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Q: You do 14 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched. How…

A: Given data: Work (W) = 14 J Spring constant (k) = 190 N/m Initially spring is unstretched Required:…

Q: (a) What is the kinetic energy in joules of a 1010-kg automobile traveling at 77 km/h?  J (b) How…

A: Given: The mass of the automobile is 1010 kg. The speed is 77 km/h.

Q: The work done against gravity in taking 5000 grams mass at 39.37 inches height in 1 sec will be

A: Work done is required to pull up a mass of m kg in height 'h' is= mgh Here, g=gravitational constant…

Q: In physics, the amount of work done on an object is the quotient on the objects and the distance…

A: Work done on an object is the dot product of force applied and the displacement of the object.…

Q: A kid on a bike coasts (No Pedaling) from the bottom to the top of a 25 m hill. What is the energy…

A: Given: The kid goes from bottom to top. The height of the hill is 25 m.

Q: (a) What is the efficiency of an out-of-condition professor who does 2.00 x 105 J of useful work…

A: A) W= 2×105 J  E= 500kcal = 21× 105 J  B) efficiency = 20%

Q: 4.00 F(r) = 32.07 – 16.0xyî - x2 A three-dimensional force is given by %3D What is the work done, in…

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Q: Can the normal force on an object ever do work? yes no

A: Yes sometimes Normal force also do works on an object.

Q: 17. A crane lifts a 2.25 x 103-N bucket containing 1.15 m3 of soil to a height of 7.50 meters.…

A: 17) Calculate the work done to lift the bucket.

Q: The SI unit of both energy and work are similar. Select one: O True False

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Q: An object sitting on the edge of a table. A bullet shot up into the air before it gets to the top. A…

A: Potential energy is defined as the energy possessed by an object by virtue of its position (height…

Q: A block of mass 10 kg is moved 10 m to the right over flat ground. If the coefficient of kinetic…

A: The kinetic frictional frictional force acting on the block of mass m moving on a flat surface is…

Q: A ski lift consists of a rope that the skiers hold on to. The rope pulls the skiers up a 250 m long…

A:

Q: a helicopter lifts a 100kg crate straight up via cable, with an acceleration of 0.8m/s. if the crate…

A: mass = 100 kg acceleration = 0.8 m/s2distance = 5 m Apparent weight = m(g+a) = 100 (10+0.8) = 1080 N…

Q: (a) Check all of the following that are correct statements, where E stands for ymc². Read each…

A: The energy is E = γmc2 That is m = rest mass The relativistic mass : m' =γm Choose the correct…

Q: Discuss the origin of the unit horsepower.

A: Horsepower unit was first time used by James Watt in 1782. The  story refers that James Watt uses…

Q: How much work is required to lift a 6 kg object from the bottom of a  10 meter deep well?

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Q: You push very hard on a heavy desk, trying to move it. You do work on the desk: O whether or not it…

A: As from the definition of work , work on any object is said to be   done when a force acts upon an…

Q: (a) What is the efficiency of an out-of-condition professor who does 2.10 x 10° J of useful work…

A: a) We know that, efficiency= (output/input)x100 So here output is 2.10×10^5 joule and input is…

Q: Note: Round off your answer in the nearest whole number. No need to include the unit. Work, Power,…

A: Write the position of the car in cartesian vector form.

Q: Problem 6: A toy cart is pulled a distance of 6.2 m in a straight line across the floor. The pulling…

A: Given data :- Displacement (along the floor) d = 6.2 m Pulling force Fp = 19.2 N Angle θ between…

Q: I just need a refresher. Taking a physics class. Would you mind working out step by step an…

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Q: (a) What is the kinetic energy in joules of a 1030-kg automobile traveling at 90 km/h?  J (b) How…

A: The mass of the automobile is m = 1030 kg. The initial velocity of the automobile is u = 90 km/h.…

Q: motorcyclist runs out of gas on a level road 250 m from the gas station. She pushes the 220 kg…

A: Work = =force ×distance

Q: Which of the following statements are true? If you apply a force to a moving object, you are doing…

A: To check which of the following statements are true.

Q: 20 N is needed to slide a box across a room to the right at a constant speed: a) How many Newtons…

A: Let us consider the forces come into picture in the above case,                                 i.…

Q: A 5-kg object is pushed across a level surface with a force of 12 N for a distance of 6 m. How much…

A: we have   an object of mass is m = 5 kg  distance d = 6 m  force f = 12 N

Q: What are informed about a particular force: "the force is inversely proportional to the cube of the…

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Q: 1. Boxing gloves are padded to lessen the force of a blow. The glove and face compress 7.5000 cm…

A:

Q: 2. Compute the work done against gravity by a pump that discharges 600 liters of fuel oil into a…

A: Please note : As per answering guidelines I can answer the first question only. Since, this is not a…

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.