The diagram below shows a track, ABC. The curved section, AB, is frictionless. The rough horizontal section, BC, is 8 m long. 4 m -8 m- B. C An object of mass 10 kg is released from point A which is 4 m above the ground. It slides down the track and comes to rest at point C. 1.1.1 State the principle of conservation of mechanical energy in words. Is mechanical energy conserved as the object slides from A to C? Write only YES or NO. 1.1.2 1.1.3 Using ENERGY PRINCIPLES only, calculate the magnitude of the frictional force exerted on the object as it moves along BC.

A force acts on a particle that moves along the X axis and varies with position according to the graph shown. if the mobile starts from the origin.  a. calculate the work done by the force when it moves from position x=8m to position x= 13m. b. find the average power that force develops if it takes 0.5 seconds to reach the position x= 2m

How much work must you do to push a 12.0 kgkg block of steel across a steel table (μkμk = 0.60) at a steady speed of 1.20 m/sm/s for 5.30 ss ? Express your answer with the appropriate units.   What is your power output while doing so? Express your answer with the appropriate units.

Susan's 13.0 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30° above the floor. The tension is a constant 28.0 N and the coefficient of friction is 0.210. Part A Use work and energy to find Paul's speed after being pulled 2.90 m Express your answer with the appropriate units. 1.93 Submit μA m S ? Previous Answers Request Answer X Incorrect; Try Again; 26 attempts remaining