At what position on object be placed in front of concave mirror of radius of curvature 0.4m so that
an erect image of
magnification 3 be produced.

the independent variable, or the one that is intentionally manipulated is the speed.

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

it breaks and dirupture other materials and other sencews from the bottom