How do you know when work is done by a force?

Q: Explain about Work done by a force.

A: When a force acts on an object over a distance, it is said to have done work on the object.  It is…

Q: A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by neans of a…

A: distance moved in each stage = 13 m

Q: Give an example of a frictional force doing positive work

A: Frictional force: This force is act between two rough surface while movement. The frictional force…

Q: Why do we say that the work done by coolie carrying a suitcase along a horizontal road is zero?

A: When a coolie lifts the luggage, he applies the force in the upward direction, which is against…

Q: How do I know when work and net work done will be positive, negative, or zero

A: Work : It is equal to the dot product of force and displacement.

Q: Question: If you hold a heavy weight over your head, the work you do •Is greater than zero. •Is…

A: work is nothing but the product of the applied force and the displacement in the direction of…

Q: A man pulls a trolley through a distance of 50m by applying a force of 100N which makes an angle of…

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Q: How do i calculate work done by frictional force

A: The work done by a force is equal to the scalar dot product of the force and the displacement of the…

Q: Question 24 A student's backpack weighs 8.0 N. The students lifts the backpack from the floor to a…

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Q: Which situation demonstrates a positive work done? O A man holding a barbell in the air. OA basket…

A: Introduction: The work done is equal to the product of applied force and displacement in the…

Q: A 1.16 kg block slides down a 15.0 m long 35.0° incline at constant velocity. How much work is done…

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Q: Darth Vader uses the Force (fitting name for it in this example) to lift an enemy rebel into the…

A: Any force acting on an object displaces the object by some distance. So this applied force does some…

Q: 3. A block attached to a spring, as shown in the Figure, starts at rest with the spring unextended…

A: The work done by the spring will be equal to the potential energy of the spring when it is stretched…

Q: A 1400kg car is traveling with an initial speed of 25.5m / s . Determine the car's speed after -…

A: Write the given values with the suitable variables. m=1400 kgu=25.5 m/sW=-2×105 J Here, m is the…

Q: The work done by the force

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Q: -) Explain, in detail, what is occurring during the negative and positive work and power phases f…

A: We have to find the negative and positive work.

Q: A warehouse worker lifts a 10 kg box a half a meter. How much work has the worker done? (Assume g =…

A: Given, Mass of box, m= 10kg, distance, d=12m=0.5 m, and g= 10 m/s2.

Q: A 4.80 kg watermelon is dropped from rest from the roof of a 25.0 m tall building and feels no air…

A: Mass of the watermelon is m= 4.80 kg Height of the roof is h = 25.0 m Initially potential of the…

Q: the work done by the force

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Q: A mother carries a 15 kg child up the stairs to bed. If the stairs have a vertical height of 3.2 m,…

A: The work done by the gravity on the child can be given as

Q: A student with a mass of 75.0 kg runs up three flights of stairs in 11.0 sec. The student has gone a…

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Q: can a potential energy be negative? or it should always be positive?

A: Potential energy can be positive , zero or negative . It is a relative term which depends on…

Q: In pulling two identical carry-on bags through the airport, Mr. Beall and his 7 year o son, James,…

A: James uses a greater force because he is shorter, making a smaller angle with the ground

Q: 1. Approximate the total work done by the force shown on the graph below. F 14 12 10 8. 6. 4 4 8 10…

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Q: You carry a 21.0 kg bag of groceries 2.0 m above the level floor at a constant velocity of 71 cm/s…

A: No work is done i.e. work done is 0.

Q: How much work in J must be done by frictional forces in slowing a 4.82 kg car from 10.28 m/s to rest

A: According to the work energy theorem,  Work done = change in kinetic energy

Q: Early one October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 3.0 kg…

A: Assuming pumpkin is lifted and moved on level ground such that its kinetic energy does not change,…

Q: using a force of 50.0N you can you push a cart 10.0 m across a school. how much work did you did?

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Q: 35. A gardener pushes a lawnmower through a distance of 20m. If he applies a force of 196N in a…

A: Work done is equal to the product of force and the displacement along the direction of applied…

Q: spring tes withl an ampi LIoniess, nonzontal surface. Find the potential energy when its position is…

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Q: Is it possible that the work done by a force is negative? Give an example.

A: Yes it is possible for work done by a force to be negative.If the displacement happened in the…

Q: "If angle between force and direction of motion is 45 degree, then the work done be" Negative…

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Q: A shopper lifts two 45-N bags of groceries a distance of 1.25 meters and carries each one for 40…

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Q: A smooth 0.165 kg hockey puck slides along a smooth floor at an initial speed of 1.0 m/s, and stops…

A: Given Mass of hockey puck is m=0.165 kg Initial speed of puck is vo=1.0 m/s Final speed of puck is…

Q: A force of 10N causes a displacement or 2m in a body in its own direction. Calculate the work done…

A: Work Done by a force is calculated as:   W = F.d                             ......(1)…

Q: How are work, force and distance related?

A: Given:   work, force and distance

Q: A boy is pulling his sister in a wagon, as shown in the figure. He exerts a force of F = 50.5 N at…

A: Given data:  Force (F) = 50.5 N Angle (θ) = 30° Displacement (d) = 27.5 m Required: Work done

Q: In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using…

A: Work done by a constan force is given by W=F→.S→W=FScosθWhere θ is the angle between F→and S→.

Q: A grocery cart is pulled along a rough horizontal surface of 6.0 N. It moves through a distance of…

A: Given: Horizontal pulling force, F = 6.0 N Displacement, S = 7.0 m Block is moving with constant…

Q: How much work is done lifting a 25 pound object from the ground to the top of a 55 foot butlding i…

A: The object of weight 25 lb is to be lifted from the ground to the top of a 55 foot building. So,…

Q: An object of mass 12kg,initially at rest ,is lifted from the ground to a final height of 10m by a…

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Q: 8.1. What is the work done by a force of 20 N acting through a parallel distance of 8 m? What force…

A: The work done by a force is   W=Fd      =(20 N)(8 m)=160 J

Q: A falling package with a parachute is greatly affected by air resistance. Suppose a package (m = 25…

A: Initial total energy=Final total energy At height As initial velocity is zero so initial kinetic…

Q: A 51 kg boy on a skate board traveling to the east with a speed of 9.9 m/s. After crossing a gravel…

A: Given : m = 51 kg vi = 9.9 m/s vf = 1.7 m/s

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

A: When the force applied on the object is perpendicular to the displacement of the object, the work…

Q: Calculate how much negative work does on the 7s Kg object, What is the speed of the object after the…

A: The kinetic frictional force will act during the time object is travelling on grass. Given , the…