2025 QUESTIONS AND ANSWERS
Vector - ANS A quantity that has magnitude and direction
scalar - ANS A physical quantity that has magnitude only.
contact force - ANS a push or pull on one object by another that is touching it
non-contact force - ANS a force that one object can apply to another object without touching
it
gravitational forces - ANS the force of attraction between any 2 objects with mass: the
greater the mass, the greater the attraction
Weight - ANS the force of gravity on an object
Mass - ANS A measure of the amount of matter in an object
Weight equation - ANS W=mg
earth's gravitational field strength - ANS 9.8N/kg
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, Resultant force - ANS The resultant of a system of force is the vector sum of all forces.
balanced forces - ANS Equal forces acting on an object in opposite directions
Work done equation - ANS force x distance
work done - ANS energy transferred
Force, spring constant, extension - ANS F=ke
elastic potential energy - ANS E = 1/2ke^2
moment equation - ANS M = Fd
Levers - ANS Simple machines with an arm that moves around a fulcrum
gears - ANS two or more wheels linked together by interlocking teeth
Pressure equation - ANS p = hpg
atmospheric pressure - ANS the pressure caused by the weight of the atmosphere
Upthrust - ANS The upward buoyant force exerted on a body immersed in a fluid
floating - ANS object is less dense than the fluid, it weighs less than the equivalent volume of
fluid
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