Can a machine multiply input force? Input distance? Input energy? (If your three answers are the same, seek help, for the last question is especially important.)

Q: The person does work on the lawn mower. Under what conditions would the mower gain energy? Under…

A: In the figure it is shown, man is pushing a mover and is doing a work  From this work of the…

Q: How much work can a 6.0-hpmotor do in 3.0h?Express your answer to two significant figures and…

A: The expression for power is,

Q: Consider the figure below where the inclined plane has a friction: 200 N 50 kg 1.2 m Given the…

A:

Q: LA force of 40N is applied to a body to move it at a uniform velocity through a distance of 15m in…

A: Exercise (1): Given: The applied force is 40 N. The displacement of the object is 15 m. The time…

Q: A cat knocks a 11.93 kg toy mouse across the floor with 15.87 N of force. If the cat did 17.9 J of…

A: Answer Given data  Weight of the toy mouse = 11.93 kg Force F = 15.87 N  Work done W = 17.9 J The…

Q: of work. Assuming that you weigh 800 N, how high could the engine lift you?

A:

Q: Does it take any work to push an object that does not move? Explain.

A: Work done is defined as product of displacement and force acting along displacement.

Q: Calculate the work required to raised body 2 meter at time of 3 sec if the mass of body 5 Kg.

A: Work is defined as  W=-∆U Here W is work done and ∆U is potential energy.

Q: A construction worker, 24 feet up ona scaffold, lifts a 4-Ib rope h over hand up to the scaffold to…

A:

Q: If you apply a deforming force on an object and let it come to equilibrium, what happened to the…

A: The work that we do on the body will be stored in the body in the form of strain energy.

Q: You do 5.8 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched. How…

A:

Q: Show that 50 W of power is required to give a brick 100 J of PE in a time of 2 s.

A: Power = Work done /Time Work Done = Change in Potential Energy = 100 J

Q: A box of mass 7.0 kg is accelerated from rest by across a floor at a rate of 3.0 m/s2 for 5.5 s.…

A: Given:mass of box, m=7 kgInitial velocity, u = 0 m/sRate of acceleration, a = 3 m/s2For time, t =…

Q: You do 11.7 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched.…

A: Given data: The work done is W=11.7 J. The spring constant is k=190 N/m.

Q: Jack and Jill are both helping to fetch a pail of water in a hill that is 16 meters high. Each of…

A: Given: mass of water m = 5 liter = 5kg distance travelled d = 16m time taken by Jack t1=1.5hrs  time…

Q: Calculate the average power required to raise a 140 kg drum to a height of 15m in 1 minute

A: The potential energy at a height h is P.E=mgh…

Q: physics student with a mass m of 50.0 kg is doing push-ups, as shown in the figure below. In…

A:

Q: If your friend pushes a lawnmower 4 times as far as you do while exerting only half the force, which…

A: The work is force times distance. Your friend uses a half of the force but goes four times as far.…

Q: Bobby and Michael are competing on bleacher runs. Both runners weight the same. Bobby runs up the…

A: Work done by gravitational forc depends only on initial and final position since gravitational force…

Q: In climbing up a rope, a 78-kg athlete climbs a vertical distance of 6.0 m in 9.0 s.   What…

A:

Q: Is energy conserved when we move?

A:

Q: Its takes 40 sec for a boy A to climb up a stairs while boy B takes 25 sec for the same job.…

A: Given data The time taken by boy A is given as tA = 40 sec. The time taken by boy B is given as tB…

Q: Two people who weigh the same climb a flight of stairs. The first person climbs the stairs in 30 s,…

A: The work done is the product of force and displacement. Here, force is the weight of the person and…

Q: An apple hanging from a limb has potential energy because of its height. If it falls, what becomes…

A: From conservation of energy, just before hitting the ground, the potential energy will convert into…

Q: Two identical golf carts move at different speeds. The faster cart has twice the speed and therefore…

A:

Q: Its takes 45 sec for a girl A to climb up a stairs while boy B takes 35 sec for the same job.…

A: In  this question  we discuss  about work done and power.

Q: Joule is a unit of the following: work, power, potential energy, and kinetic energy, true or false?

A: Work: Work = Force ×Displacement      W = F ×S Units of work:    1 J = 1 N m   Power: Power = Work…

Q: Requireu informatUON An arrangement of two pulleys, as shown in the figure, is used to lift a…

A: Given: The mass of the object is 77.5 kg. The displacement of the block is 2.78 m. The free-body…

Q: Time yourself while running up a flight of steps, and compute the average rate at which you do work…

A: Suppose that, Total height of all the steps is h = 50 m Mass of the person is m = 60 kg Time taken…

Q: How are work, force and distance related?

A: Given:   work, force and distance

Q: vertically

A: The total amount of work done per unit of time is termed as power. Power is defined as the rate at…

Q: A man of mass 75kg runs up a flight of 50 steps in 15 seconds. Calculate the power output, when this…

A:

Q: Why is it tiring to push hard against a solid wall even thoughyou are doing no work?

A: Work done is given by W=F·s·cosθ where, F=Forces=Displacementθ=Angle between force and displacement

Q: If the man in exercise of 500 J pushes the lawn mower 6.0 m in 10 s, how much power does he expend?

A: Energy expended (E) = 500 J Distance moved (d) = 6 m Time (T) = 6 seconds

Q: Exactly what is it that enables an object to do work?

A:

Q: During a physics lab, Jack and Jill ran up a hill. Jack is twice as massive as Jill; yet fill…

A: Given that Jack and Jill ran up a hill. Jack is twice massive than Jill.Jill ascend the same…

Q: If a machine multiplies force by a factor of 4, what other quantity is diminished, and by how much?

A:

Q: A system of two paint buckets connected by a lightweight rope is released from rest with the 12.0-kg…

A: Given;- The mass of the bucket  12 kg  at the height h =2.5 m from the ground in the rest position…

Q: Consider the figure below: 300 J 6 m 3 m Calculate the required motor power (in horsepower) to lift…

A: Given: The work done required is 300 J. The time interval is 15 s.

Q: now much work does he do on the crate?

A: We know the work done W=F. d------------------(1) ANS: The work done is 919.24 N-m or 920 Joule.

Q: Can a machine multiply input force? Input distance? Input energy?

A:

Q: Calculate the power required to raise a 20kg object to a height of 10m in 1 minute.What assumptions,…

A: Given Data:- Mass of the object is m=20 kg Height at which the object is raised h=10 m Time t=1…

Q: Jack and Jill are both helping to fetch a pail of Nater in a hill that is 16 meters high. Each of…

A: Height of hill = 16 m amount of water carried by each = 5 Litres Time taken by Jill = 1 hour Time…

Q: You do 6.4 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched. How…

A: Given data: Work done (W) = 6.4 J Spring constant (k) = 190 N/m Initially spring is unstressed…

Q: If the baseball in #10 starts from rest before acted on by the force that does 250 J of work, what…

A: