0. Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0° lope at constant speed, as shown below. The coefficient of friction between the sled and the snow is 0.100. a) How much work is done by friction as the sled moves 30.0 m along the hill? (b) How much work is done by he rope on the sled in this distance? (c) What is the work done by the gravitational force on the sled? (d) What s the total work done? 60° 13 W f

QUESTION 5 Which of the following statements about energy is not true? The mechanical energy of a physical system is constant when the forces acting on the system are all conservative forces. a. O b. According to the work-energy theorem, the forces that contribute to the net work include all the conservative and nonconservative forces. c. The total energy of the universe is always conserved. O d. Energy can change form, but it cannot be created or destroyed. O e. Mechanical energy is always conserved ONH

*multiple choice Calculate the net work from point a to B given mass = 6kg A. 12 J B. 108 J C. Cannot be determined D. 36 J E. 48 J F. 0

Question on Physics - Unit - Work and Energy Which of the following statement correctly describes the relationship between an objectsgravitational potential energy and its height above the ground? A. Proportional to the square of the objects height above the groundB. Directly proportional to the objects height above the groundC. Inversely proportional to the objects height above the groundD. Proportional to the square root of the objects height above the ground