Mock (Exam Test Updated) Questions With Correct Answers

The benefits of a field test {Ans: 1. easier to achieve high ecological validity 2. results are valid due to comfortable environment 3. collection of data can be quick}manipulation of moment of inertia during the flight and landing phase {Ans: 1. rotating objects have angular motion, MOI and angular velocity work inversly proportional 2. Start of the flight phase, the gymnast begins flexing their hips tor educe the MOI 3. reduction in MOI increase angular velocity 4. prior to landing they extend their hips to increase MOI}outline why identical twins share some human characteristics {Ans: some characteristics are expressed developmentally by genes that are determined at birth e.g. eye colour other characteristics are expressed environmentally e.g. height influenced by nutrition}3 different types of drag can be reduced in swimming {Ans: SURFACE as body moves through a fluid its outer surface catches a layer of fluid-slowing it down can be minimised by changing the surface to reduce interaction between surface and fluid DRAG as a body pushes against a fluid, fluid pushes back By streamlining a body and minimising the surface area facing the direction of the motion WAVE when a body moves along the surface a