4. Determine the kinetic coefficient of friction 20ON a.2.4 m/s" - M- 21ky

Q: Write a short note on work?

A: Work

Q: Can there be a net force on an object and have no work done to it? Defend your answer.

A: let the net force acting on the object be "F"  and displacement of the object due to this force is…

Q: Does a spring exert the same amount of force regardless of its extension?

A:

Q: What is the work done lifting a 20kg child from the floor to a height of 2m? (Note that a mass of…

A: Given  Mass(m) = 20 kg  Height (h) = 2 m  Acceleration due to gravity near earth surface (g) = 9.8…

Q: m above

A:

Q: How much work is done raising at 3 kg mass 5 meters inthe vertical direction

A:

Q: A person does some work of 1,000 J in 2 s. His power will be ...... A) 1000W B) 25W C) 500W…

A:

Q: A crate of mass 65 kg is pushed along a floor with a force of 40 N for a distance of 12.11 m.…

A: Introduction :  In this question we are provided with value of force and distance.with these data we…

Q: A 2-kg block of wood is pushed by horizontal force of 10 N to a distance of 3 m. The work done…

A: Given:  Mass of block m= 2 Kg Force applied F= 10N Distance d= 3m

Q: Does the work required to lift a book to a high shelf depend on how fast you lift it? Does the power…

A: 1. No the work does not depend on how fast we left a book to a high shelf. Reason  Since work done…

Q: Show that 2.4 J of work is done when a force of 2.0 N moves a book 1.2 m.

A: Work done = Force x Distance moved by the force = Fd W = 2.0 N x 1.2 m W = 2.4 N.m = 2.4 J

Q: If the speed of a particle is doubled, what happens to its kinetic energy?

A:

Q: Ten and one-half foot-pounds of work is required to compress a spring 6 inches from its natural…

A:

Q: If a runner exerts 350 J of work to make 150 W of power, then how long did it take the runner to do…

A:

Q: Calculate the work performed by a horse pulling a wagon Forward with 200 N of a force across a…

A:

Q: A crate of mass 40 kg is pushed along a floor with a force of 120 N for a distance of 26 m.…

A: Given data,  Distance  =  d  Force  =  F        To find ,        Work done

Q: Calculate the work done by a force of 41 Newtons that moves a box through a displacement of 26…

A: Given data:  Force (F) = 41 N Displacement (d) = 26 m Required: Work done (W)

Q: A motionless object could have (a) speed. (b) kinctic energy. (C) elastic energy. d) all of these.…

A: The amount of energy is required for any object to move from one place to another or heat up.

Q: How much net work must be done to accelerate a 1000 kg 20 m / s to 30 m / s?

A: According to the work energy theorem, the work done must be equal to the change in kinetic energy.…

Q: Is energy conserved when we move?

A:

Q: What is the efficiency of the machine that miraculously converts all the input energy to useful…

A: GivenInput energy = Output useful energy

Q: wath will be the potential energy of 4 Kg height of 12m. [Take g = 10 m/s² ] mass kept art

A: Write the given values with the suitable variables. m=4 kgh=12 mg=10 m/s2 Here, m is the mass, h is…

Q: Calculate the work performed by a horse pulling a wagon forward with 150 N of force, across a bridge…

A: Force applied by the horse (F) = 150 N Length of bridge (L) = 50 m Mass of horse (M) = 50 kg

Q: Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 70 km/h ?

A: Given data:  Mass (m) = 1500 kg Initial velocity (Vi) = 70 km/h Final velocity (Vf) = 0  Required:…

Q: A factory worker pushes a 24.0 kg crate a distance of 8.0 m along a level floor at constant velocity…

A: Given Mass of crate = 24 kg It is moved by a distance = 8.0 m during this movement velocity is…

Q: The done work for man has power * (5.2 Watt) during (1 hours) is

A: Given: Power P=5.2 Watt Time  t=1 hours=1×60×60=3600 s

Q: When can energy be transferred from one object to another?

A: Energy is the ability to do work. Energy is a conserved quantity and the law of conservation of…

Q: Show that a machine that has an input of 100 J and an output of 40 J is 40% efficient.

A:

Q: A 20-foot chain weighing 5 pounds per foot is lying coiled on the ground. How much work is required…

A:

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: