Speed PDF

 Speed is a change of position over time. It also tells how fast or how slow a moving object is.  Speed has only the magnitude which make it scalar and velocity has magnitude and direction which make it vector.  FORMULA 𝑐ℎ𝑎𝑛𝑔𝑒 𝑜𝑓 𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑆𝑃𝐸𝐸𝐷 = 𝑡𝑖𝑚𝑒...

 Speed is a change of position over time. It also tells how fast or how slow a moving object is.  Speed has only the magnitude which make it scalar and velocity has magnitude and direction which make it vector.  FORMULA 𝑐ℎ𝑎𝑛𝑔𝑒 𝑜𝑓 𝑝𝑜𝑠𝑖𝑡𝑖𝑜𝑛 𝑆𝑃𝐸𝐸𝐷 = 𝑡𝑖𝑚𝑒 ΔX 𝑉= 𝑡  The greater the distance travelled at a lesser period of time, the greater speed.  m/s which means 1 meter is travelled within 1 second. CALCULATING SPEED EXAMPLE 1 A bus travelled 250 m in 10 seconds, what is the speed of the bus? SOLUTION ΔX 𝑉= 𝑡 250𝑚 𝑉= 10 𝑠 𝑉 = 25 𝑚/𝑠 EXAMPLE 2 A man covers 45 m in 5 seconds during his exercise. What is the speed of the man? SOLUTION ΔX 𝑉= 𝑡 45 𝑚 𝑉= 5𝑠 𝑉 = 9 𝑚/𝑠 EXAMPLE 3 A boat is moving at a speed of 140 km in 2 hrs. What is the speed of the boat? SOLUTION ΔX 𝑉= 𝑡 140 𝑘𝑚 𝑉= 2 ℎ𝑟𝑠 𝑉 = 70 𝑘𝑚/ℎ𝑟  SUMMARY Speed is a change of position over time. It also tells how fast or how slow a moving object is. By using the formula V= Δd/Δt. Speed has only the magnitude which make it scalar and velocity has magnitude and direction which make it vector. The greater the distance travelled at a lesser period of time, the greater speed. DISTANCE VS TIME GRAPH