Work Done By Force (Force on Angle) Determine the work that is being done by tension in pulling the box 102.0 cm along the table. Also determine how much energy is being lost by the block due to friction and how much of the work done by tension has turned to KE. 5.6 N 30° 30.17 3.1 kg

Explain how you know there is work being done on an object?

Which of the following statements are TRUE? A. Energy is a vector physical quantity. B. Energy is always required to do work. C. Totol mechanical energy can never be zero. D. When law of conservation of mechanical energy is invoked, there can never be a waste energy in an ideal system. E. When law of conservation of mechanical energy is invoked, there can never be a waste energy in a real-world system. F. Kinetic energy can be negative. G. Potential energy can be negative. H. Work is equivalent to the negative change in kinetic energy. I. Work is equivalent to the negative change in potential energy. J. In a conservative system where only gravitational force acts, the total mechanical energy is constant at every point of the motion. K. In a non-conservative system where certain external forces may act, the total mechanical energy is not constant at every point of the motion. L The entire universe may be considered as a closed system where the total energy is constant. chnices O B. D.…

A body moves with increasing speed.  Which of the following statements is true? A. The net work done on the body is positive, and the kinetic energy is increasing. B. The net work done on the body is positive, and the kinetic energy is decreasing. C. The net work done on the body is zero, and the kinetic energy is decreasing. D. The net work done on the body is negative, and the kinetic energy is increasing. E. The net work done on the body is negative, and the kinetic energy is decreasing.

3. A 90.0 N box of papayas is pulled 10.0 m along a level surface by a rope. If the rope makes an angle of 20.0° with the surface, and the force in the rope is 75.0 N, how much work is done on the box? 4. Whis 5 Savelled

a) Calculate the work done when a 5.0 kg bag of apples is lifted 1.2 off the ground.  b) If this bag of apples is carried at this height to the checkout counter, is any work done? Justify your choice.  c) Calculate the power developed when the action of lifting the apples takes 2.0 s.