9. When a load of 10 kg is hung from the wire, then extension of 2 m is produced. Then work done by restoring force IS (а) 200 J (b) 100 J (d) 25 J (c) 50 J

Q: A student in a lab exerts a force of 25 N on an angle to pull a block by a distance of 48 cm. If a…

A: Given data :- Force F = 25 N Displacement d = 48 cm = 0.48 m Work done W = 11 J

Q: You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 690…

A: Given that, weight of person  (w1 ) =  690N weight of belongings  w2 = 1040 N  height of floor h =…

Q: 2. Calculate the work done by a 2.0-N force (directed at a 80° angle to the vertical) to move a 500…

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Q: 19. A 200 kg roller coaster starts from rest. The ride reaches a maximum height of 30 m and a top…

A:

Q: What is the average useful power output (in W) of a person who does 5.20 ✕ 106 J of useful work in…

A: Given : Work done (W) = 5.20 ✕ 106 J  Time (t) = 8.40 h = 8.4*60*60 = 30240 sec Mass (m) = 2300 kg…

Q: F(N) 3 X(m 4 9. -2 A particle of mass (2kg) is subject to a force (F) that varies with position as…

A: work done =14J

Q: 1. Calculate the work done by a force of 30 N in lifting a load of 2kg to a height of 10m (g =…

A: Required work done by given forces to displace the objects.

Q: The figure shows a block of mass 10 Kg. Determine what will be the work done by the force F that…

A: Given, Mass, m= 10 kg, height, h= 18m, and friction coefficient, μ=0.3.

Q: 2. A 450kg piano slides 3.5 m down a 25° incline and is kept from accelerating by a man who is…

A:

Q: Calculate the work done by a 1500 watts appliance if it runs for 300 seconds

A: As per our guidelines, we are supposed to answer only first one question in case of multiple…

Q: The average power output of the human heart is 1.33 watts.(a) How much energy does the heart produce…

A: Power is Time is Note:Find:(a) Energy produces by human heart in one day.(b) Estimate the height a…

Q: Why is it tiring to push hard against a solid wall even if no work is done? A 75 kg firefighter…

A: Q 1) We get tired because we use our energy to contract the muscles. We try to push the wall using…

Q: m A person is pushing a wooden crate of mass mo = 20 kg at a constant speed vo = 1.2– for Ax = 3 m…

A: Given: Mass of the wooden crate, mo = 20 kg Speed of the crate, vo = 1.2 m/s Distance moved, ∆x = 3…

Q: 8. Calculate the power required of a 1400kg car under the following circumstances: (a) the car…

A: a) Let the force F required to speed up the car. This can be calculated using Newton’s second law of…

Q: Calculate the work done when a 5.0 kg bag of apples is lifted 1.2 m off the ground.  13 c)…

A:

Q: 4. A 0.25 hp motor is used to lift a load at the rate of 5 cm/s. How great a load can it lift at…

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Q: 4. A 4.7 kg block is pushed 3.1 m up a vertical wall with constant speed by a constant force of…

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Q: person pushes a m = 2.60 kg carton a distance d = 4.20 m along the floor by a constant for agnitude…

A: Given:-  m= 2.60 kg  d= 4.20 m  F= 16.0 N  θ=30° Find:-  (a) Determine the work done on the carton…

Q: A boy with mass m-50 kg walks up h=2 m high stairs at a constant speed in t=4 s. What is the average…

A:

Q: If it requires 6.0J of work to stretch a particular spring by 2.0 cm from its equilibrium length,…

A:

Q: Suppose you have an object attached to a bizarre spring, initially located at x = 0, the equilibrium…

A: Given: An object attached to a bizarre spring located at x = 0. Force of the object = F = Kx We need…

Q: 19. If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60.0 s, at…

A: average weight of a passenger= 660 N Total weight lifted= 100×660= 66000 N Height H= 150 m time…

Q: A bucket weighing 10 newtons when empty is loaded with 90 newtons of sand and then lifted at 10 cm…

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Q: To compress spring 1 by 0.20m takes 150 J of work. Stretching spring 2 by 0.30m requires 210J of…

A:

Q: rope has a uniform mass density of 0.4 kg/m. The rope is 10 m long and is lowered into a 10 m deep…

A: Given: A rope has a uniform mass density of 0.4 kg/m length of rope = 10 m depth = 10 m

Q: 4. Identify a case where an object is moving over a surface with friction, but the frictional force…

A: The frictional force is the force that acts between the surface of contacts between two objects.…

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

A:

Q: 61 : A metal wire of length 2.5 m and area of cross section 1.5 × 10 m² is stretched through 2 mm.…

A: Work done in stretching the wire gets stored in the form of its elastic potential energy. It is…

Q: 2. Go You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight…

A:

Q: A 355 kg box is pulled 6.00 m up a 30° frictionless, inclined plane by an external force of 4875 N…

A:

Q: A 40 kg box initially at rest is pushed 5.0m along a rough horizontal floor with a constant applied…

A: Given data: Mass of the box m =40 kg Distance d =5.0 m Force F =130 N Coefficient of friction ,…

Q: 6. One end of a light inextensible string is attached to a block. The string is used to pull the…

A: Work done by an external force =

Q: 28. Ssscalar. A box of mass 20.0 [kg] slides down from the top of a surface inclined at 50.0° with…

A: mass = 20 kg θ = 50oh = 10 m μk = 0.35

Q: A horizontal force of 200 N is applied to a 55-kg cart across a 10-m level surface. If the cart…

A:

Q: The work necessary to stretch a spring trom 9 in to 10 in is times the work necessary to stretch it…

A:

Q: 43. A block of mass m slides from rest down an inclined plane of length s and height h. If F is the…

A:

Q: 1. The restoring force from a non-ideal spring can be described by Fp=-250N/m A-800N/m³. (Az)³,…

A: