LINEAR MOTION-ssekwe-1.pdf

The SI unit of displacement is a metre (m). NOTE: Displacement is a vector quantity. The person moves from point A to B in a specific direction. The distance moved in that direction is called displacement. Therefore, displacement is described by both magnitude and direction hence a vector quantity. ❖ Speed: This is the rate of change of distance with time. 𝑨 𝑻𝒊𝒎𝒆 SSEKWE 𝑬𝒎𝒂𝒊𝒍: 𝒔𝒔𝒆𝒌𝒘𝒆𝒓𝒐𝒃𝒆𝒓𝒕@𝒈𝒎𝒂𝒊𝒍. 𝒄𝒐𝒎 𝑪𝒂𝒍𝒍: 𝟎𝟕𝟓𝟐𝟎𝟓𝟑𝟗𝟗𝟕 𝑼𝒏𝒍𝒐𝒄𝒌𝒊𝒏𝒈 𝑶′𝒍𝒆𝒗𝒆𝒍 𝑷𝒉𝒚𝒔𝒊𝒄𝒔 ROBERT 𝑩 The SI unit of speed is metre per second (𝑚𝑠−1 𝑜𝑟 𝑚/𝑠). NOTE: Speed is a scalar quantity. Uniform speed: This is the constant rate of change of distance with time. A body is said to move with uniform speed if it covers equal distances in equal time intervals. If the body moves with varying distances in unit time intervals, then the speed is non-uniform. 𝑺𝒑𝒆𝒆𝒅= 𝑫𝒊𝒔𝒕𝒂𝒏𝒄𝒆 1 𝑨 LINEAR MOTION This chapter deals with the study of motion in a straight line. TERMS USED IN LINEAR MOTION ❖ Distance: This is the length of path moved by the body OR This is the length between two points. The SI unit of distance is a metre (m). NOTE: Distance is a scalar quantity. The person moves from point A to B regardless of any direction he/she takes. The length of path from A to B is called distance. Therefore, distance is described by only magnitude hence a scalar quantity. ❖ Displacement: This is the distance moved in a specified direction. 𝑩 𝟒 ROBERT SSEKWE 𝑫𝒊𝒔𝒑𝒍𝒂𝒄𝒆𝒎𝒆𝒏𝒕 (𝒎) | 𝟎 | 𝟐 | 𝟒 | 𝟔 | 𝑻𝒊𝒎𝒆 (𝒔) | 𝟎 | 𝟏 | 𝟐 | 𝟑 𝑫𝒊𝒔𝒑𝒍𝒂𝒄𝒆𝒎𝒆𝒏𝒕 (𝒎) 𝟎 𝟐 𝟒 𝟔 𝑻𝒊𝒎𝒆 (𝒔) 𝟎