A skier is going down a mountain at 3 m/s. They then see their friend up ahead who they want to pass. The skier gets in a tuck and accelerates at an
average acceleration of 2.1 m/s/s for 4 seconds. What is the final speed of
the skier after this time? (use formula sheet) *

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)