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Created by hairat-yetunde.b
over 10 years ago
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Question | Answer |
speed:the distance by an object in one unit of time you need to be able to use the three main unit of speed | kilometers per hour {km/h} miles per hour {mph} meters per second {m/s} |
Distance: speed x time time: distance divided by speed speed:distance dived by time | force |
force: causes a stationary object to move push & pull: tends to move an object or make it go faster or change direction | weight:tends to move all object towards the center of the earth- gravity friction: slows down object moving over .e.g brakes used on a bicycle friction moves the wheels |
lubrication:used to reduce friction between two surface in contact | advantage of friction when driving a car around a corner friction is needed to stop accident shoes in contact with the ground |
disadvantages of friction your foot rubbing against the shoe you need more fuel {friction uses a lot of fuel} sole of your shoe wears out | tension:may act against gravity to stop the body falling 4 example stretching : elastic band |
compression:crushing a can electric:tends to move charged particles magnetic:picking up magnet materials | mass vs weight |
weight weight is a force measured in Newtons weight has direction the weight of an object can charge | mass mass of an object is the amount of matter in it mass measured in grams or kilograms mass does not have direction mass of the object remains constant |
weight=mass x10 | hooks law the extension of a spring is directly proportional to the force covering the extension |
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