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Acceleration

1,864 bytes added, 10:24, 13 February 2019
Example Calculations
===Example Calculations===
====Calculating Acceleration====
{| class="wikitable"
|-
<math>a \approx -47m/s/s</math>
|}
 
====Calculating Change in Velocity====
 
{| class="wikitable"
| style="height:20px; width:200px; text-align:center;" |A car begins from rest and [[accelerate]]s at a rate of 4.5m/s/s for 23 seconds. Calculate the change in [[velocity]] of the car correct to two [[Significant Figures|significant figures]].
| style="height:20px; width:200px; text-align:center;" |A person on [[The Moon]] drops a ball vertically. The [[acceleration]] due to [[gravity]] on [[The Moon]] is 1.6m/s/s. Calculate the change in [[velocity]] of the ball after 5.3seconds, correct to two [[Significant Figures|significant figures]].
|-
| style="height:20px; width:200px; text-align:left;" |'''1. State the known quantities'''
 
a = 4.5m/s/s
 
t = 23s
| style="height:20px; width:200px; text-align:left;" |'''1. State the known quantities'''
 
a = 1.6m/s/s
 
t = 5.3s
|-
| style="height:20px; width:200px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers and [[Evaluate (Maths)|evaluate]].'''
 
<math>a = {\frac{\Delta v}{t}} </math>
 
<math>4.5 = {\frac{\Delta v}{23}} </math>
| style="height:20px; width:200px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers and [[Evaluate (Maths)|evaluate]].'''
<math>a = {\frac{\Delta v}{t}} </math>
 
<math>1.6 = {\frac{\Delta v}{5.3}} </math>
|-
| style="height:20px; width:200px; text-align:left;" |'''3. [[Rearrange (Maths)|Rearrange]] the equation and [[Solve (Maths)|solve]].'''
 
<math>\Delta v = 4.5 \times 23</math>
 
<math>\Delta v = 103.5m/s</math>
 
<math>\Delta v \approx 100m/s</math>
| style="height:20px; width:200px; text-align:left;" |'''3. [[Rearrange (Maths)|Rearrange]] the equation and [[Solve (Maths)|solve]].'''
 
<math>\Delta v = 1.6 \times 5.3</math>
 
<math>\Delta v = 8.48m/s</math>
 
<math>\Delta v \approx 8.5m/s</math>
|}
 
====Calculating Time Taken====