What amount of work that need to be done by an external force on a particle on a frictionless, horizontal surface to double its speed from v to 2v?

Q: Two protons are released from rest when they are 0.7 µm apart. What is their initial potential…

A: Given: Separation between protons  r=0.7 μm=0.7×10-6 m Standard value used : Proton charge…

Q: Suppose you lift a laptop that weighs 4.7 pounds off the floor onto a shelf that is 6 feet high. How…

A: Given  Height h = 6 ft  Acceleration due to gravity g = 32.17 ft/s2  Mass m = 4.7 pound

Q: An apple, starting at rest, falls from a tree branch 2.0 m above the ground. When the apple hits the…

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Q: A mass of 8 kg is traveling at a constant 10.8 m/s when a 39 N force, F, starts to act in the…

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Q: 1) 2 v, = V2 %3D Car #1 has twice the mass of 2) 12 v, = V2 %3D car #2, but they both have the 3) 4…

A: Given data:  m1 = 2m2 KE1 = KE2 Required : Relationship between speeds of cars

Q: What speed must a 7m ladder have if it is to be able to fit between the simultaneously closed doors…

A: proper length of ladder (Lo) = 7 m length of ladder in garage's frame (L) = 5 m

Q: An object having a mass of 0.79 kg falls from a height of 5272 m to 447.7 m. Calculate the work done…

A: Given :      mass of the object, m = 0.79 kg      Initial height , h1 = 5272 m      Final height, h2…

Q: True or false  The potential energy of an object cannot be increased by internal forces. When a…

A: Internal forces are kind of forces that are exchanged by the object in the system. The internal…

Q: The power needed to accelerate a projectile from rest to its launch speed v in a time t is 33.0 W.…

A: Note that power is energy or work done per unit time. initial power is, P=KEtP=12mv2t the final…

Q: If A = 2i − 3j + k and A · B = 0, does it follow that B = 0? (Either prove that it does or give a…

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Q: as the vertical distance of the The potential energy of an object same object from the surface of…

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Q: An object is said to have “escaped” from the gravitational potential of a planet if the object would…

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Q: Two planets of mass 1 x 1025kg are release from rest 8.0 x 1012 m apart.  What is the speed of the…

A: Given: Mass of planets : m1=m2=m=1×1025 kg Distance r=8.0×1012m To find the speed ''v'' at half the…

Q: A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed…

A: Given: Speed Vo= 20.5 m/s Height h= 53 m

Q: How much work is required to stop an electron which is moving with a speed of 1.3 × 106 m/s? (mass…

A: Work is equal to the dot product of the force and displacement. It is defined as the amount of…

Q: A mass m has a velocity v at a position x, what will be the work done if the distance traveled is…

A: Given, mass=m velocity v at position x let initial velicity u=0 m/s let acceleration is a m/s^2 so…

Q: A 2-kg object moving on a horizontal frictionless surface with a speed of 4 m/s is brought to rest…

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Q: Suppose that a spacecraft of mass 5.4x103 kg at rest in space fires its rockets to achieve a speed…

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Q: A moving electron has a Kinetic Energy K1. After a net amount of work is done on it, the electron is…

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Q: A 4 kg particle has an initial velocity of (4i–3j) m/s. Some time later, its velocity changes to…

A: Mass of particle = 4 kg Initial velocity = 4i^ - 3j^ meter per second Magnitude of initial velocity…

Q: Determine the total energy (in J) stored in the system if C = 12.99 mF and the potential difference…

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Q: A 104 kg man is skiing across level ground at a speed of 8.3 m/s when he comes to the small slope…

A: Given that,                     initial velocity(vi)=8.3m/s                     mass of man(m)=104kg…

Q: What magnitude of force must the worker apply? How much work is done on the crate by the workers…

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Q: How much work is required to stop an electron (m = 9.11 × 10¬31 kg) which is moving with a speed of…

A: mass of electron = m =  9.11 x 10-31kg initial velocity = Vi = 1.10 x 106m/s final velocity = Vf= 0…

Q: How much work is done by the normal force?

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Q: A little boy has mass (m) and a girl who has mass (2m) are standing still at an ice skating rink.…

A: SOlution:

Q: What amount of work that need to be done by an external force on a particle on a frictionless,…

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Q: How much work is done? when 50N of force move a box through a distance?

A: Given, Force = 50 N

Q: How much work (in J) is needed to displace a charged particle by 1.74 mm with a 843000 N of electric…

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Q: A 40 kg stone falls from a height of 10 meters. Accordingly, what is the speed of the stone when it…

A: Given: m = 40 kg h = 10 m h' = 5 m

Q: A force of 17 Ib is required to hold a spring stretched 3 in. beyond its natural length. How much…

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Q: How much work (in J) is needed to move a proton by 2 cm with a 10000 N of electric force

A: Given : Force F = 10000 N             Displacement d = 2 cm = 0.02 m

Q: An electron in a television tube is accelerated uniformly from rest to a speed of 8.4×107m/s over a…

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Q: A man pushes a 15 kg box from rest to a speed of v, doing 200 J of work in the process. During this…

A: Work = FS  F = Work/S = 200/6 = 33.33 N  Now , a = F/m = 33.33/ 15 = 2.22 m/s^2 Now,  by  V^2 =…

Q: Find the work done by a of force of 4.8N for moving a body of mass 7 ?? from (8,7) to (−6,2).

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Q: An object with m=2kg is dropped from 9m. Which of the following describes correctly potential,…

A: Given Mass of an object is m=2  kg Acceleration due to gravity is g=10   m/s2 Initial height of an…

Q: 32. When a body falls freely under gravity, then the work done by gravity is _ O positive O negative…

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Q: A man whose mass is 100kg walks up the third floor of a building which is 12-m high relative from…

A: 1. The work done by man as he walks up the floor. W=F×d…

Q: A 1.5 m high person is holding a 20 kg trunk on his head and is standing at a roadways bus-terminal.…

A: Work Done is calculated by the formula :   W = Force x Displacement                    ......(1)

Q: How much work (in J) is needed to move a proton by 4 m with a force of 2000 N?

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Q: work done by a conservative force in terms of its potential energy.

A: Concept of potential energy  relates work done by a conservative  force with change in potential…

Q: An object is placed to a shelf from the ground which is 1.8 m higher. find out how much work is done…

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