One watt-hour is equivalent to: A. 6.3 x 103 J B. 6.3 x 10-7 J C. 3.6 x 103 J D. 3.6 x 10-3 J

Q: • A constant force F = 2i+3j acts on an object of mass m = of 7= 9î – 43. What is the work done? 18…

A: Given that, Constant force, F = 2i + 3j N Object mass, m = 18 kg Displacement vector, r = 9i - 4j

Q: 4. Determine the potential and kinetic energy for each position. KE=0 J PE=35 000 J KE- KE- PE- PE…

A: We need to determine the values of kinetic and potential energies at the shown positions.

Q: A child and sled with a combined mass of 28.6 kg slide down a frictionless hill, starting at the…

A: Given Data Combined mass of the child and the sled is m=28.6 kg Initial speed of the sled is vi=0…

Q: A small truck has a mass of 2195 kg. How much work is required to decrease the speed of the vehicle…

A: Given that: Mass of truck = 2195 kg On level road, To decrease the speed of the vehicle from 23m/s…

Q: Q1. A force of 7N as on an object. The displacement is, say 8 m, in the direction of the force. Let…

A: Work done on an object is given by the formula, Work done = (Force)(Displacement), where the…

Q: QT1. The kinetio energy of a body changes from 12 J to 00 J due to the action of a force of 5 N on…

A: From Law of Energy Conservation:   Work Done = Change in Kinetic Energy = Final kinetic Energy -…

Q: A 630-kg car speeds up from rest to 43 mph in 3.2 seconds. What is the work done on the car and what…

A: Given Data: The mass of the car is, m = 630 kg. The initial velocity is,  u = 43 mph. The final…

Q: A 51.7-kg hiker ascends a 43.2-meter high hill at a constant speed of 1.20 m/s. If it takes 384 s to…

A: Given:  mass of hiker, m = 51.7 kg  height of the hill, h = 43.2 m  velocity, v = 1.2 m/s  time, t =…

Q: Question 8 A machine does 2500 J of work in 1 min. What is the power developed by the machine? A 42…

A: Given Work done by Machine = 2500 J Time taken by Machine = 1 min = 60 sec We have to calculate the…

Q: A 500 kg car traveling at 55 m/s slows to 30 m/s. How much work done is done on the car in slowing…

A: Given: Mass m = 500 kg Velocity u = 55 ms Velocity v = 30 ms To determine: Force and work done.…

Q: A spring has a natural length of 18 cm. If a 25-N force is required to keep it stretched to a length…

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Q: 15. The figure below shows the acceleration of a 10-kg package that is accelerated to a maximum…

A: Write the equation for the work done. Work doneW=Area under the curve…

Q: A 10.0 g spider has a kinetic energy of 0.020 J. Find its speed in m/s.

A: The given values are written below with appropriate variables. Here, m denotes the spider’s mass…

Q: 8. A person pulls a toboggan for a distance of 35.0 m along the snow with a rope directed 25.0°…

A:

Q: 2. Determine the potential and kinetic energy for each position. (100 meters, 30 meters, 60 meters,…

A: At 100 m  KE = 0 PE = 35000 J = m×10×100  m = 35 kg Now, At 30 m  PE = 35×10×30 = 10500 J  KE =…

Q: A child and sled with a combined mass of 56.0 kg slide down a frictionless slope. If the sled starts…

A:

Q: A radio-controlled car powered by an electric motor accelerates from rest to 0.600 m/s in 22.0 ms.…

A: Solution:   Given Values, Initial Velocity (u) =0 m/s (since, it starts from rest)Final Velocity (v)…

Q: A 5.39 kg object is initially traveling at 32.8 m/s. During the next 240 seconds – 683 J of total…

A: Given:Mass of the object = 5.39 kgInitial velocity = 32.8 m/sWork done = - 683 J

Q: 2. A 1200 kg car is moving at 30 m/s and speeds up to 35 m/s. Find the work done on the car.

A: According to the work energy theorem, the work done is equal to the change in Kinetic energy,…

Q: You apply a constant force of (33 N) i- (42 N) j to a loaded supermarket pushcart as it undergoes a…

A: From the question, it is given that- Constant force applied: F→=(33N)i^-(42N)j^Displacement of…

Q: A 550 kg elevator accelerates upward at 1.2 m/s2 for the first 15 m of its motion. How much work is…

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Q: A force of 450 newtons stretches a spring 30 centimeters. How much work is done in stretching the…

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Q: what is the output power for student D climbing stairs, in Watts? Use g = 10 m/s2.

A: Write the mass of the student.   m=80 kg   Write the vertical height of the stairs.   h=20 m   Write…

Q: A 0.34-kg particle has a speed of 3.0 m/s at point A and kinetic energy of 8.1 J at point B. (a)…

A: Mass of the particle m=0.34 kg Speed of the particle at point A ,vA=3.0 m/s The kinetic energy at…

Q: 76. A cable lifts a 1200-kg elevator at a constant velocity for a distance of 35 m. What is the work…

A: To determine: (a) The work done by the tension in the cable. (b) The work done by the elevator’s…

Q: A 630-kg car speeds up from rest to 43 mph in 3.2 seconds. What is the work done on the car and what…

A: (a) Work done is equal to change in kinetic energy W1=Ekf-Eki=12mvf2-vi2=12630 kg19.2 ms2-0…

Q: A child and sled with a combined mass of 26.1 kg slide down a frictionless hill, starting at the…

A:

Q: Q3. Find the amount of work done in lifting a body of 5 kg through 10 m. Take g = 10 m/s?. O 5J O 15…

A:

Q: You apply a constant force of (49 N) (52 N) to a loaded supermarket pushcart as it undergoes a…

A:

Q: A child and sled with a combined mass of 32.6 kg slide down a frictionless hill, starting at the…

A: Given  Initial speed = u = 0 m/s  Final speed = v = 6.69 m/s   Height attain = H =??  Acceleration…

Q: 1. How much mechanical work is done on a brick wall if a man pushing with a 250 N force fails to…

A: We will answer the first question since the exact one is not specified. Please resubmit the request…

Q: How much work is done by a girl weighing 500 N in climbing 5.0 m up a rope in the school gym?

A: Given data:  Weight (mg) = 500 N Height (h) = 5.0 m Required: Work (W)

Q: A 9.55 kg object is initially traveling at 24.8 m/s. During the next 185 seconds – 263 J of total…

A: According to the work energy theorem,

Q: 5. A 2-kg object moved from rest to a speed of 10 m/s. a) Calculate the work done on the object? b)…

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Q: 150 m Complete the following statements to explain how the conservation of energy principles apply…

A: In this problem, the second image is blurred so we will solve the question shown in first image.

Q: A 0.59-kg particle has a speed of 5.0 m/s at point A and kinetic energy of 8.5 J at point B. (a)…

A: Given Data:- The mass of the particle is m = 0.59 kg. The speed of the particle at point A is vA =…

Q: An 8.0-g bullet has a speed of 370 m/s. a. What is its kinetic energy? KE = J b. What is its kinetic…

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Q: 1. A car with a mass of 2,000 kg drives to the top of a 100-meter hill in 15.0 seconds. Find the…

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Q: Sienna is getting her books . To lift her books from a table , 50 J of work is done . How much power…

A: Given Work done w =50 J Time t = 0.5 s

Q: rope applies a horizontal force of 500 N to pull a crate a distance of 2 m across the floor. A…

A:

Q: 40.0 m/s E 50.0 m/s

A: Resultant of two vector can determined by parallelogram law

Q: "30 kg bear slides, from rest, 12 m down a Lodgepole Pine tree, moving with a speed of 5.6 m/s just…

A:

Q: 2. The S.I. unit for the work done on an object is A kg m's B kg m? s" C kg m s? D Kg m's2

A:

Q: Within certain limits, the amount a spiral spring is compressed is proportional to the stretching…

A: Spring force is given as  F =-kxWhere x is compression or elongationk = spring constant

Q: A spring has a natural length of 15 cm. A 50 N force is required to stretch (and hold the spring) to…

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Q: Two blocks of masses M =1 kg and M 2 kg are connected by a very light string passing over a massless…

A: Given : masses are M1 = 1 kg & M2  = 2 kg  displacement of block 1 , S = 3 m

Q: How much work is needed to stop a 1330 kg car that is moving straight down the highway at 15 m/s? (…

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Q: Jim rides his skateboard down a ramp that is in the shape of a quarter circle with a radius of 5.00…

A: