5. Which does not describe a force pair? а SC.6.P.13.3 A When you push on a bike's brakes, the friction between the tires and the road increases. B a a When a diver jumps off a diving board, the board pushes the diver up. © When an ice skater pushes off a wall, the wall pushes the skater away from the wall. D When a boy pulls a toy wagon, the wagon pulls back on the boy.

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.