In Which of the Following Cases Is No Work Done

By Ra_Alyssa188 23 Apr, 2022 Post a Comment

The maximum work is done when the force applied is parallel to the direction of movement. If work is done at a faster rate then.

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Even if you exert a force if the displacement remains the same then it will always be zero so the force times displacement will be 0 hence no work is done.

. Pushing a stationary box. Iii Work is done as the displacement takes place in the direction of force. In the case of the trailer the trailer is being pulled and it is travelling in the direction of the force applied.

Which of the following is the best example of work being done. 4If you push a wall but it does not move. In which of the following cases work is being done.

If not check your calculations. 2You are carrying two bags i n your hands and not moving. In which of the following cases is there no work done.

School University of Michigan. If the direction of the force and the displacement are perpendicular to each other the total work done by the force on the object is null. Explain why the work done in Case b is not the area under the Case b force curve.

B Carrying a box down a corridor. 3A person holds a bundle of hay over his head for 30 minutes and gets tired. Make sure that you are calculating the displacement y as the final position minus the initial position.

In option A while man is pushing wallit will not have any displacement and hence he is not doing any workIn option B same situation and no work is done as coolie is not movingIn option C angle between force and displacement is not 90 0 and it has displacementHence option C is the correct answer. Ch 11 Work and Energy. A Glowing of an electric torch.

In an electric flashlight the chemical energy of the cell is. Or we can say. Work done by centripetal force is.

The angle does not affect the amount of work done on the roller coaster car. Moon revolves around the earth due to. No work is done.

B A person shoveling snow across a driveway at a constant speed. D Energy is spent and work is done. In the following situations state whether work is being done and why or why not.

C Energy is not spent and work is not done. So Work done is 0 Work Done when Force Acts opposite to Direction of Motion When force acts opposite to direction of motion Angle made between direction of force and direction of motion is 180 degree In this case Work Force Distance cos θ Work Force Distance cos 180 Since cos 180 degree 0 Work Force Distance -1. Are the measured work values close to the theoretical work values.

A No work is being done on the bag because the direction of motion is perpendicular to the direction of force due to gravity. In which of the following cases is there no work done a A weightlifter lifts a. Pushing a box against a wall.

Advertisement Remove all ads. Advertisement Remove all ads. B Photosynthesis in plants.

The weight of the beam is 8kN and a 4kN force is applied im to the left of D. I Work is done because the displacement of swimmer takes place in the direction of applied force. As shown in figure.

From the above. No work is done. A student pushes a locked door that does not move.

Work Done and Energy Relation. In which of these cases is work being done. There is no work done in above case as there will be no displacement in that case so work done is ZERO.

In which of the following cases is work being done. For example when we thrust hard against a wall the force we are applying on the wall does not work because in this case the displacement of the wall is d 0. A A boy pushing a rock b A boy climbing up the stairs c A coolie standing with a box in his head d A girl moving on the road.

In which of the following cases is this taking place. MCQ Questions for Class 9 Science. TASK 1 OF 2 The following beam is supported by a pin at A and a roller at D.

Ii a coolie standing with a load of 12 kgf on his head. The correct option is C Running in a straight line Work is done when an object moves through some distance due to the force applied to it. Situations where no work is done are 1If a block is moving on a smooth horizontal surface no work is done.

When a body falls freely towards the earth then its total energy. Work being done in the following cases. Which of the following forces does the least work.

APushing against a locked door. The other options the object is not displaced. B Q There is no work done when the force and the displacement are perpendicular to each other.

So we can say it is. In which of the following cases is work being done. Course Title ENVIRON 8.

Sitting at one position. So we will have following options. Ii If the donkey is not moving no work is done as the displacement of load does not take place in the direction of applied force.

But when man moves upon the stair be pushes himself forward and upward too. As we know that work done is defined as product of force and displacement in the direction of applied force. Determine the reaction forces at A and D.

Pages 4 This preview shows page 1 - 3 out of 4 pages. A A person carrying a backpack walking across a floor. 8 KN 4 kN ma 60 D B с 2 m 1 m 1 m Use all steps from the Problem Presentation Method PPM as your submitted work for this problem.

In first three cases displacement is perpendicular to the direction of force and as WFScos0. Energy is spent but work is not done. Standing still at one position.

Running in a straight line. I A man pushing a wall. So a displacement in the direction of force generates So some amount of work is done here.

Iii A boy climbing up a staircase. A P b Q c R d S Ans. Ben Travlun carries a 200-N suitcase up three flights of stairs a height of 100 m and then pushes it with a horizontal force of 500 N at a constant speed of 05 ms for a horizontal distance of 350 meters.

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