Changes

| style="height:20px; width:300px; text-align:center;" |'''A [[horse]] begins trotting at 3.0m2m/s and accelerates to canter at 11m/s in 21.0 8 [[second]]s. Calculate the acceleration of the [[horse]] correct to two [[Significant Figures|significant figures]].| style="height:20px; width:300px; text-align:center;" |'''A space probe is travelling at 18,000m100m/s and uses a thruster for 250 255 [[second]]s to slow down to 6,000m200m/s. Calculate the acceleration of the space probe correct to two [[Significant Figures|significant figures]].'''

| style="height:20px; width:300px200px; text-align:left;" |final speed = 11[[m/s]]'''1. State the known quantities'''

initial speed <math>\Delta v</math> = 11 - 3.0[[m2 = 7.8m/s]]

time = 21.08[[s]]| style="height:20px; width:200px; text-align:left;" |'''1. State the known quantities'''

<math>a = {\tfrac{Delta v-u}{t}} </math>= 6,200 - 18,100 - = -11900m/s

<math>a time = {\tfrac{11255s|-3| style="height:20px; width:200px; text-align:left;" |'''2.0}{2[[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].0}} </math>'''

<math>a = {\tfrac{8.0\Delta v}{2.0t}} </math>

<math>a = 4m/s/s {\tfrac{7.8}{1.8}} </math>| style="height:20px; width:300px; text-align:left;" |final speed = 18,000[[m/s]]

initial speed <math>a = 6,000[[m4.333m/s]]/s </math>

time <math>a \approx 4.3m/s/s</math>| style= 250"height:20px; width:200px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [s[equation]] and [[Solve (Maths)|solve]].'''

<math>a = {\tfrac{\Delta v-u}{t}} </math>

<math>a = {\tfrac{18,000-6,00011900}{250255}} </math>

<math>a = {\tfrac{12,000}{250}} -46.67m/s/s </math>

<math>a = 48m\approx -47m/s/s </math>