Melinda is pushing a chair along a 5 meter straight path through her living room. She is standing, pushing at the top of the chair with a force of 30 newtons at a 22° angle of depression from the horizontal. (a) Calculate the work done in moving the chair. (b) How could Melinda re-arrange herself to make the energy use more efficient?

Q: The diagram shows a crate with mass m = 38.2 kg being pushed up an incline that makes an angle φ =…

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Q: Bonny Blair of the United States set a world record in speed skating when she skated 5.00 x 10^2 m…

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Q: Cite an example in which a force is exerted on an object without doing work on the object.

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Q: While rearranging a dorm room, a student does 323 J of work in moving a desk 2.6 m. What was the…

A: Ans:-  Work:- The work done by a constant force acting on an object is equal to the displacement…

Q: A shopper in a supermarket pushes a trolley with a force of 30N directed at an angle of 25° downward…

A: Given : F = 30 N θ = 25° d = 40 m

Q: How much work is done against the gravitational force on a 25.0-kg suitcase when it is carried from…

A: Given: Mass of the suitcase (m) = 25 kg Height carried (h) = 380 m acceleration due to gravity (g) =…

Q: A tractor tows a plane from its airport gate, doing 8.8 MJ of work. The link from the plane to the…

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Q: If A 29-kg child starts from rest and slides down a slide that is 2.6 m high. At the bottom of the…

A: Given parameters :  Mass "m"= 29kg  Height "h"= 2.6m  Final Velocity "v"= 2.5m/s .   Concept :…

Q: A block of mass 12kg is being pulled to the right by a rope that makes a 37 degree angle with the…

A: Given data: Mass (m) = 12 kg Angle (θ) = 37° with the horizontal Displacement (d) = 21 m Tension…

Q: A 1.00 kg block starts from rest at the top of a 20.0 m long 30.0 degree incline. Its kinetic energy…

A: Given:Mass of block, m = 1 kgIncline angle, θ = 30°Kinetic energy, K.E = 98 J

Q: As a woman carries her suitcase up a flight of stairs, she does work against gravity. If the mass of…

A: mass of suitcase (m) = 10 kg Height of stairs (h) = 12 m g = 9.8 ms2

Q: A 29-kg child starts from rest and slides down a slide that is 3.6 m high. At the bottom of the…

A: Given data- mass m=29 kg, h=3.6 m, initial velocity vi=0 m/s rest, final velocity vf=1.35 m/s

Q: he surfer in the photo is catching a wave. Suppose she starts at the top of the wave with a speed of…

A: The initial velocity of the surfer, vi = 2.83 m/s The final velocity of the surfer, vf  = 10.4 m/s…

Q: Find the work done in joules by gravity as an object of the mass m=8 kg is raised up at constant…

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Q: How much work is done on a downhill skier by an average breaking force of 813 newtons to stop her in…

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Q: Starting from rest, a 60.0 kg student takes 4.0 s to run up a 3.0 m high flight of stairs. On…

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Q: A physics professor tries to barricade himself in his office by pushing a 30 kg desk in front of the…

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Q: A body of mass 2 kg is initially at rest on a horizontal frictionless plane. It is then pulled 4…

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Q: Acrate is moved 2 meters along a horizontal floor at a constant speed by force of 50 N which makes…

A: Given data:  Force (F) = 50 N Distance (d) = 2 m Angle (θ) = 30° above the horizontal  Required:…

Q: A 7.50kg box is pushed 1.70m along a frictionless horizontal table top by a constant force directed…

A: Given data:  Mass of box (m) = 7.50 kg Force (P) = 20.0 N Displacement (Δx) = 1.70 m Work done (W) =…

Q: Find the work done in joules by gravity as an object of the mass m310 kg is raised up at constant…

A: Mass = 10 kg  Displacement = h2 - h 1 = 80m - 22 m =  58 m As we know Workdone  is given by W  Which…

Q: A horizontal spring with a spring constant k = 126 kN/m is relaxed from an extension x = 9.3 cm back…

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Q: How much work must you do to push a 13 kgkg block of steel across a steel table at a steady speed of…

A: Given: The mass of the block is 13 kg. The constant speed of the object is 1.3 m/s. The coefficient…

Q: I attached the problem. Thank you

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Q: How much work did the movers do (horizontally) pushing a 46.0-kg crate 10.6 m across a rough floor…

A: Given- Mass of crate (m) = 46 Kg Distance (d) = 10.6 m Coefficient of friction (μ) = 0.50

Q: A firefighter climbs a 10 m long ladder that is inclined at 40° to the horizontal.  If she has a…

A: Given Data: The length of the ladder is: L=10 m The angle of the ladder with the horizontal plane…

Q: A person pulls a crate 46.6 meters along a horizontal floor by a constant force 105.4 N, which acts…

A: constant force = F = 105.4 N angle = 37.5 degrees frictional force = f= 50.6 N

Q: Find the work done in joules by gravity as an object of the mass m-8 kg is raised up at constant…

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Q: As an object moves from point A to point B only two forces act on it: one force is conservative and…

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Q: While training for breeding season, a 460 gram male squirrel does 29 pushups in a minute, displacing…

A: Given:- While training for breeding season, a 460 gram male squirrel does 29 pushups in a minute…

Q: A crane lifts a 650 kg beam vertically upward 6.6 m and then swings it westward 18 m. How much work…

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Q: Ricky moves a wagon a distance of 36 meters by pulling the handle with a force of 120 Newtons. If…

A: Given: Force (F) = 120 N  Distance (d) = 36 m  Work done = 2200 J

Q: A student slides her 67 kg desk across the level floor of her dormitory room a distance 8 m at…

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Q: A 1200 N crate rests on the floor. How much work is required to move it at a constant speed (a) 5.0…

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Q: A shopper in a supermarket pushes a trolley with a force of 40N directed at an angle of 35° downward…

A: Given: Force F = 40 N. Angle = 35o Distance ∆x = 30 m To determine: Work done Formula used: W = F ×…

Q: A horse pulls a 300 kg sled for 50 m over level ground at constant speed, exerting a force of 3000 N…

A: The mass of the sled, m=300 kg The displacement of the sled, d=50 m The force exerted by the horse…

Q: A 1.5 kg hockey puck initially moving at 4.9 m/s slides 12 m along the ice before coming to rest.…

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Q: While training for breeding season, a 380 gram male squirrel does 32 pushups in a minute, displacing…

A: Given: m = 380 g = 0.38 kg  number of push ups, n = 32  height, h = 8.5 cm = 0.085  m

Q: A worker pushed a 27 kg block 9.2 m along a level floor at constant speed with a force directed 32…

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Q: Find the work done in joules by gravity as an object of the mass m 5 kg is raised up at constant…

A: Mass of object m = 5 kg Initial height h1 = 26 m Final height h2 = 69 m g = 10 m/s²

Q: A block of mass m= 2.50 kg is pushed a distance d = 2.20 m along a frictionless horizontal table by…

A: Given data: Mass (m) = 2.50 kg Distance (d) = 2.20 m Applied force (F) = 16.0 N Angle (θ) = 25.0°…

Q: how much work is done on a cart by a force F=(10i+5j)kN that causes a displacement of d=(2i+0j)m?

A: The work done is given by  W =  F→ . d→ where, F is the force vector and d is the displacement…