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: A block of mass m = 2.50 kg is pushed d = 2.00 m along a frictionless horizontal table by a constant…

A:

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A: (A) Given that the mass of the crate is m = 3kg. The initial height of the crate is 0.5 meter and…

Q: A 15 kg box is being pushed 4.0 m along a rough horizontal surface at a constant velocity by a…

A: Given: The mass of the box: m=15 kg Distance moved: D=4.0 m Applied force: Force: F=25 N

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A: mass of object                            m = 2.50 kg  Distance block pushed…

Q: 20. A 0.58 kg box is pulled with 70 N of force at an angle of 150 above the horizontal across a flat…

A: Given: m = 0.58 kg, F = 70 N, θ = 15°, s = 17 m

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

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Q: Suppose a horizontal force of 20 N is required to maintain a speed of 8 m/s of a 50 kg crate. (a)…

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Q: A child on a sled is initially at rest on an icy horizontal surface. The sled is pushed until it…

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Q: thou a displa Is pusned norizontal Newtons. Non-conservative forces (friction) remove 14 Joule stem.…

A: Given values:- Displacement,(d)=3 m -----(1) Force,(F)=89 N -----(2) Non-conservative forces work…

Q: A block of mass m = 2.50 kg is pushed d = 2.30 m along a frictionless horizontal table by figure…

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Q: A box is pushed horizontally though a displacement of 4.4 metres by a force of 61 Newtons.…

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Q: In the figure below, a 0.250 kg block of cheese lies on the floor of a 891 kg elevator cab that is…

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Q: At a constant velocity, you are pulling a 10 kg object with a horizontal force P. How much work is…

A: Given: Mass of object, m=10 kg Displacement, s=60 cm kinetic frictional coefficient, μk = 0.58   To…

Q: A rope is used to pull a 3.5 kg block at constant speed 6 m along a horizontal floor. The force on…

A: Given The mass of the block is m=3.5 kg. The distance covered by the block is d=6 m. The force…

Q: A 130 kg crate slides down a ramp, starting from rest. The ramp is inclined at an angle of 27.8…

A: Given : Mass of crate = 130 kg             Angle  = 27∘             Coefficient of kinetic friction…

Q: Starting from rest, a 5.40-kg block slides 1.90 m down a rough 30.0° incline. The coefficient of…

A: a) The required work done by force of gravity is,

Q: e roof, descends another vertical 7.0-meter ladder, and returns to his starting location on the…

A: GivenMass of carpenter, m=75 kgHeight of ladder, h=7 mDistance travelled on roof, d=12 m

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A: Given:- A luggage handler pulls an m = 15 kg suitcase up a ramp inclined at an angle θ=33⁰ above the…

Q: A 4878-kg car is driving down a portion of highway that is inclined 10° with respect to the…

A: According to question---- Given data-- Mass of car (m) = 4878 kg. Incline angle = 10 degree…

Q: A sled of mass 70 kg starts from rest and slides down a 10° incline 80 m long. It then travels for…

A: Given that-Mass of the sled, m= 70 kgLength of the plane, L= 80 mAngle of inclination of the plane…

Q: If a man lifts a 20.0‐kg bucket from a well and does 6.00 kJ of work, how deep is the well? Assume…

A: Mass of bucket (m) = 20.0 kg Work done ( W ) = 6.00 kJ

Q: a crate with a mass of 155 kg starting from rest, slides down a ramp making an angle 32 degrees with…

A: Given data: Mass of the crate m=155 kg Angle θ=32° length of the ramp l=6m Frictional force F =200N

Q: While hovering, a typical flying insect applies an average force equal to twice its weight during…

A: Mass of insect (m) = 10 g = 0.01 kg weight of insect (w) = m×g = 0.01×9.8= 0.098 N Applied force (F)…

Q: A 60 kg snowboarder (including equipment) heads down a ski hill starting at a height of 100 m, from…

A: Mass, m = 60Kgheight, h = 100minitial speed, u = 4.5m/sfinal speed , v = 90kmh = 90x518 ms =…

Q: tant speed of 2.6 m/s, h« e? At what rate is the fo

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Q: At Schlitterbahn, a 75.0 kg person rides a 12.0 m high water slide. If dissipative forces do -6.25 x…

A: Visualize the Problem:

Q: A 2-kg block travels from the top of a plane inclined 25o with the horizontal compressing a spring…

A: We know that the frictional force in an inclined plane is given by, Ffriction = μN          =…

Q: A 1000kg elevator accelerates upward at 1.0m/s2 for 10m, starting from rest. (a) Draw a before and…

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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…

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Q: A factory worker pushes a 35-kg crate a distance of 7 m along a level floor at constant velocity by…

A: Given data: Mass of crate, m=35 kg Horizontal distance covered by the crate, x=7 m Coefficient of…

Q: A 941 kg elevator carries passengers with combined mass of 455 kg as it ascends at constant speed of…

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Q: Starting from rest, a 4.2-kg block slides 2.20 m down a rough 30.0° incline. The coefficient of…

A: Given Data: The mass of  a block is, m=4.2 kg The distance at which box slides is, d=2.20 m The…