You are in a room in a basement with a smooth concrete floor (friction force equals 40 N) and a nice rug (friction force equals 55 N) that is 3 m by 4 m. However, you have to push a very heavy box from one corner of the rug to the opposite corner of the rug. Will you do more work against friction going around the floor or across the rug, and how much extra?  a. Across the rug is 275 J extra b. Around the floor is 5 J extra c. Across the rug is 5 J extra d. Around the floor is 280 J extra

Q: If m = 3.5 kg, F = 18 N, θ = 25 degrees, d = 2.25 m, and the surface is frictionless, A. What is…

A: (a) The expression for work done by applied force is given by Wappliedforce=F·d=Fdcosθ=18 N2.25…

Q: 5. A factory worker pushes a 42.5-kg crate a distance of 11.2 meters along a level floor at a…

A: Given that: The mass of the crate is m=42.5 kg The distance is d=11.2 m The coefficient of kinetic…

Q: 1. A 0.14 k-g pine cone falls 16m to the ground, where it lands at a speed of 13 m/s. (a) With what…

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Q: A mechanic pushes a 3850 kg car from rest to a speed of v, doing 5083 J of work in the process. Find…

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Q: 1. I drag a mass m = 21 kg in a straight line, along a horizontal surface, a distance D horizontal…

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Q: A force acts on a particle which moves from the origin to point C. The particle can travel along…

A: Given: The work done by the force for each path: WOBC = 50 J, WOAC = 125 J, WOC = 66.7 J.  The work…

Q: A 600 N hiker carries a 2.0 kg knapsack up a trail. After 30 minutes, the hiker is 300 m higher than…

A: We  know that when an object is on the height of h from the ground the  Gravitational potential…

Q: You push your physics book 2.40 m along a horizontal tabletop with a horizontal push of 3.00 N while…

A: Given data: Displacement (d) = 2.40 m, horizontal Horizontal puch force (F) = 3.00 N Force of…

Q: 3. a 0.35-kg fruit is falling from a tree with a speed of 5.0 m/s after t = 1.0 s. At t = 2.0 s, the…

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Q: The energy stored in a spring is 20 J when it is stretched to 5cm. How much energy is stored when it…

A: Given data: Energy stored in spring (U) = 20 J Stretch in spring (x) = 5 cm New stretch in spring…

Q: Abigail is sliding down a slippery-wet grassy hill, speeding up, before landing in a pile of leaves.…

A: According to work energy theorem, work done = change in kinetic energy For case 1 and 2, since speed…

Q: 1. Emma pushes a 45.0kg box across a level floor with an applied force of 155N [30° above…

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Q: In the attached image, the mass is 3.20 kg, and theta=37 degrees. The surface does have friction,…

A: Given:Mass of the box = 3.2 kgTheta = 37 degreesStatic coefficient=0.45Kinetic…

Q: a. b. Find the work done by the force of friction. Find the coefficient of friction.

A: The work energy theorem states that the work done on any object is equal to the difference between…

Q: A crate of mass 20.0 kg is pushed up a rough incline, which makes an angle of 25° with the…

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Q: 63. An object moving in the xy-plane is subjected to the force CALC F = (2xyî + x²ĵ) N, where x and…

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Q: A puck, mass 0.20 kg, slides on a horizontal ice rink with a speed of (1.47x10^0) m/s. A hockey…

A: This can be solved using the work-energy theorem. As per the work-energy theorem net work done on an…

Q: A particle experiences a variable force F= (2+2x+ x^2)N that acts in the x direction. The work done…

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Q: The heart does about 1 Joule of work while pumping blood into the aorta during each heartbeat. a.…

A: Using:                             work done per second = number of heartbeats × power We use…

Q: An 7.7 kg crate is pulled 5.5 m up a 30° incline by a rope angled 17° above the incline. The tension…

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Q: Consider the woman doing push-ups in the figure. She has a mass of 49.2 kg, and the distance from…

A: The objective of the question is to calculate the work done by the woman in doing push-ups and her…

Q: A 5.0-kg block that initially has a speed of 6.0 m/s is moving in a straight line on a level surface…

A: Concept Work done by all forces is equal to change in kinetic energy Since only frictional force is…

Q: A block of mass 2.28 kg starts sliding from rest down an incline plane for 25 cm. If the block has a…

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Q: Q1. a. Distinguish between homogeneous and non-homogeneous equation. b.Find the work done in…

A: A. A non-homogeneous system of equations is a system in which the vector of constants on the…

Q: 10 kg block is being pulled along the ground (µk=0.3) by a guy pulling the rope at a 30° ngle (from…

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Q: A crate with mass m = 33.3 kg being pushed up an incline that makes an angle φ = 22.7 degrees with…

A: Free body diagram :

Q: a. Calculate the work done (in J) on a 1550 kg elevator car by its cable to lift it 39.5 m at…

A: Given : Mass of the car, m = 1550 kg Friction force, F = 135 N Lifted height of car, h = 39.5 m…

Q: A 1250 kg truck is moving at 85 km/h. If the speed of the truck is changed to 60 km/h by applying a…

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Q: A 101-kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope…

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Q: 39 A 1.00 kg block slides down a 20.0 meter ramp at a constant velocity. The angle of inclination of…

A: GIVEN             A) Mass of block =m = 1 kg                 length till slide =S = 20m…

Q: A 4.21-kg watermelon is released from rest from the roof of an 27.8-m-tall building. a. Calculate…

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Q: A force, in an angle of 32º, is applied to a 28-kg object which caused it to accelerate at 12 m/s2.…

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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.