Work, Energy, and Power
Which of the following statements best describes the concept of work in physics?
Which of the following is an example of a conservative force?
A block is pushed along two different paths from point A to point B. Path 1 is a straight line, while Path 2 is curved. If the work done by gravity is the same for both paths, what can be concluded about gravity?
A box is pushed up a ramp. In addition to gravity, friction also acts on the box. What must be considered when calculating the total work done on the box?
A constant force of 20 N is applied to a box, causing it to move 4 meters in the direction of the force. How much work is done on the box?
A force of 50 N is applied to a box at an angle of 60 degrees to the horizontal. If the box moves 10 meters horizontally, how much work is done by the force?
Three forces act on an object: = 20 N at 0 degrees, = 30 N at 90 degrees, and = 40 N at 180 degrees. If the object is displaced 5 meters along the x-axis, what is the total work done on the object?
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According to the work-energy theorem, what is equal to the net work done on an object?
A net force does 500 J of work on an object. If the object's initial kinetic energy was 200 J, what is its final kinetic energy?
A block slides down an inclined plane with friction. How does the work-energy theorem apply to this situation?