Physics Unit 2 Revision (Higher tier)

Terminal velocityAn object falling through a fluid or gas will initially accelerate due to the forceof gravity. Eventually the force of gravity will be balanced by the up thrust ofthe liquid/gas; this makes the resultant force zero and the object will move atits terminal velocity (steady speed).The faster the object falls the greater the frictional force that acts.To the left isa velocitytime graphfor a skydiver whojumped outof a plane.Sample Question 6(a)The diagram shows a steel ball-bearing falling through a tube of oil.The forces, L and M, act on the ball-bearing.What causes force L?..................................................................................................................................................................(1)