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PHYSICS LATEST EXAM 2025-2026 WITH
VERIFIED QUESTIONS AND CORRECT ANSWERS
weight - correct answer>>force a body exerts due to the pull of gravity mass - correct answer>>the measure of the amount of material in a body weight= - correct answer>>mass x velocity objects are stable if - correct answer>>lower com large surface area objects will topple if - correct answer>>vertical line through the com falls outside the base a moment is produced which causes the object to rotate com is - correct answer>>the point where all the mass of that object may be considered to be balance at com because - correct answer>>the moments on each side are equal density is - correct answer>>mass per unit volume density= - correct answer>>mass/volume density tells us - correct answer>>how closely the particles are packed friction is - correct answer>>a force that opposes motion air resistance or drag - correct answer>>occurs when the object moves through air or fluid reduce friction by - correct answer>>lubrication changing the material or fluid rollers streamlining friction acts in the - correct answer>>opposite direction of the object friction exists - correct answer>>when two surfaces move over each other
a force can - correct answer>>change the direction of motion change the shape of things start objects moving and slowing down 2 main groups - correct answer>>contact and distant contact - correct answer>>forces touch the object and produce a change of shape or state of motion distant - correct answer>>forces act at a distance 1st law - correct answer>>a body will remain at rest or move at a constant velocity if the resultant force acting on the body is zero balanced forces exist when - correct answer>>two forces act in opposite directions but are the same size 2nd law - correct answer>>if a resultant force acts on a body the body will not remain at rest or move at constant velocity, it will accelerate resultant force= - correct answer>>mass x acceleration principal of moments - correct answer>>when a object is balanced, the total sum of the clockwise moments is equal to the sum of the anticlockwise moments, about the pivot distance is - correct answer>>ground covered displacement is - correct answer>>shortest distance from start to finish in a certain direction speed is - correct answer>>rate of change of distance velocity is - correct answer>>rate of change in displacement acceleration is - correct answer>>rate of change in velocity scalar - correct answer>>magnitude vector - correct answer>>magnitude and direction
magnetic heat kinetic - correct answer>>movement in sport light - correct answer>>bulb heat - correct answer>>radiator sound - correct answer>>radio chemical - correct answer>>battery magnetic - correct answer>>magnet EPE - correct answer>>rubber band GPE - correct answer>>anything above the ground electrical - correct answer>>pylon nuclear - correct answer>>inside nucleus unit of energy - correct answer>>joules efficiency= - correct answer>>useful out/total in word down= - correct answer>>force x distance moved kinetic energy= - correct answer>>½mv² principle of energy - correct answer>>energy cannot be created or destroyed, only changed into different forms power - correct answer>>rate at which work is done or energy is transferred power= - correct answer>>work done/time a fossil fuels - correct answer>>transporting oil and gas to power stations
d fossil fuels - correct answer>>strip mining destroys large areas of landscape a nuclear - correct answer>>produces small amount of waste d nuclear - correct answer>>waste produced is very, very dangerous a geothermal - correct answer>>no fuel is needed d geothermal - correct answer>>hazardous gases and minerals may come up from underground a wind - correct answer>>free and wind farms need no fuel d wind - correct answer>>wind is not always predictable a hydro-electricity - correct answer>>no waste or pollution is produced d hydro-electricity - correct answer>>water quality and quantity can be effected downstream which may have an impact on plant life a tidal - correct answer>>tides are totally predictable d tidal - correct answer>>few suitable sites for tidal barrages a solar - correct answer>>produces no waste or pollution d solar - correct answer>>doesn't work at night a wave - correct answer>>can produce a great deal of energy d wave - correct answer>>need a suitable site where waves are consistently strong a biomass - correct answer>>less demand on fossil fuels d biomass - correct answer>>makes green house gases thermionic emission - correct answer>>current goes through a metal wire and gets so hot that it emits particles Democritus - correct answer>>introduced the idea of building blocks
great penetration-stopped by thick lead or concrete weakly ionising no mass magnetic field has no effect half life - correct answer>>time taken for half the radioactive nuclei to decay eg radiation - correct answer>>radon and thoron cosmic rays the body nuclear fission - correct answer>>This is when heavy nuclei can be forced to split into two lighter nuclei nuclear fission 2 - correct answer>>Uranium-235 can be split into two lighter nuclei when it is struck by a slow neutron. The products produced move apart at very high speed, carrying with them a vast amount of energy. At the same time 2 or 3 fast neutrons are also produced. control rods - correct answer>>absorb neutrons moderator - correct answer>>slow neutrons down a nuclear fission - correct answer>>heat energy produced is used to produce electricity d nuclear fission - correct answer>>fission fragments are radioactive. this radioactive waste must be extracted and disposed of. this is difficult and expensive. nuclear fussion - correct answer>>this is when two lighter nuclei combine to form a single heavier nucleus nuclear fussion 2 - correct answer>>at very high temperature, the atoms are stripped of their orbiting electrons and the resulting nuclei are moving at very high speeds. under normal conditions the nuclei would repel each other, moving very fast they can fuse together to form a new nucleus. in the sun the isotopes called tritium and deuterium fuse to create helium. vast amounts of energy released a nuclear fussion - correct answer>>plentiful and the product helium is inherit
d nuclear fussion - correct answer>>nuclei have to be travelling at very high speed so very high temperatures are required if light enters or leaves a different material, of different optical density - correct answer>>the speed of light changes and therefore the direction of travel changes light travels in - correct answer>>straight lines light speed in vacuum - correct answer>>300000km/s dispersion - correct answer>>spreading out of white light into its separate colours properties of image in plane mirror - correct answer>>same size as object virtual laterally inverted as far behind mirror as object is in front line joining any point of the image to the same point on the object cuts the mirror at right angles conditions of total internal refraction - correct answer>>light must be travelling from a more optically dense material to a less optically dense material angle of incidence is greater than the critical angle for the given material convex - correct answer>>thicker in the middle concave - correct answer>>thicker in the edges optical centre - correct answer>>centre point of lens principal axis - correct answer>>line through the optical centre and at right angles to the surfaces principal focus convex F - correct answer>>point to which all rays incident, parallel to the principal axis converge focal length f - correct answer>>distance between its optical centre and principal focus principal focus concave F - correct answer>>point from which all rays incident, parallel to the principal axis appear to diverge
radar walkie talkie e radio - correct answer>>none on human body u microwave - correct answer>>wifi satellite communication in the kitchen e microwave - correct answer>>heat up cells u infra-red - correct answer>>heater tv remote pir sensors night vision lazer beams e infra-red - correct answer>>burns u visible light - correct answer>>sight photography photosynthesis e visible light - correct answer>>stimulates the retina activates cones u ultraviolet - correct answer>>sun beds detects counterfeit notes fluorescent e ultraviolet - correct answer>>could give you skin cancer melanoma u x-ray - correct answer>>x-ray internal examination of the body e x-ray - correct answer>>causes cancer u gamma rays - correct answer>>radiotherapy
e gamme rays - correct answer>>kills good cells around the bad ultrasound - correct answer>>use of energy in ultrasounds to physically alter material ultrasound - correct answer>>detection of elected ultrasound to build image average velocity= - correct answer>>total displacement/total time force= - correct answer>>mass x acceleration GPE= - correct answer>>mgh
