Uniform Speed (or Constant Speed) PDF

rI t "fi il;e,::r;,*: i r,;; r'i'!i ili'tr"** i r l::4,:r ri time, no matter equal distances in equal intervals of A body has a uniform sPeed if it travels sPeed of saY' examPle, a car is said to have uniform For be. may intervals time these how small of an hour, 1 km everY minute' every half hour,...

rI t "fi il;e,::r;,*: i r,;; r'i'!i ili'tr"** i r l::4,:r ri time, no matter equal distances in equal intervals of A body has a uniform sPeed if it travels sPeed of saY' examPle, a car is said to have uniform For be. may intervals time these how small of an hour, 1 km everY minute' every half hour, 15 km every quarter 60 km Per hour, if it travels 30 km practice the speed of a bodY alreadY discussed above, in actual and 1/60 km everY second. As we have of a bodY is known to be a long time. Ii however, the sPeed for (or constant) uniform remains rarely time or if we know the much distance it will travel in a given constant, we can find out exactly how that distance' We will now can calculate the time taken to travel we body, the bY travelled distance on sPeed' solve some numerical Pro blems based in 5 minutes. Calculate his sPeed A scooterist covers a distance of 3 kilometres in: (a) centimetres Per second (cm/s) (b) metres Per second (m/s) (c) kilometres Per hour (km/h) rt::J , i;,. i:..1* ffi.,,lil":if..:$J,,ii:,;l;.:n:,:.n":*:?;.il,H:[I'il;:ffi}1,x andthegiventimeof5minutesintoseconds.Pleasenotethat lkilometrehas1000metresandlmetrehasl00centimetres'Now Distance travelled == 1:1r* ", =3x1000x100cm (1) = 300,000 cm rimetaken...(2) We know that, =il$:""Distance travelled Speed = Time taken = Time taken 300,000 cm 300 s..(3) = 1000 cm/s centimetres per second' Thus, the speed of scooterist is 1000 - (b)Inordertoexpressthespeedinmetrespersecondweshouldconvertthe givendistanceof3kilometresintometresandthegiventimeof5minutes into seconds. Thus, in this case: Distance travelled = 3 km =3x1000m = 3000 l6 "" m Motion I (4)