Open main menu

Changes

Acceleration

1,923 bytes added, 16:44, 13 October 2018
no edit summary
===Example Calculations===
{| class="wikitable"
|-
| style="height:20px; width:300px; text-align:center;" |'''A person starts at rest and accelerates to a [[speed]] of 8m/s in 0.8 seconds. Calculate the acceleration of the person.'''
| style="height:20px; width:300px; text-align:center;" |'''A racing car travels comes around a corner at a speed of 20m/s and in 1.5 [[second]]s accelerates to a [[speed]] of 80m/s. Calculate the acceleration of the racing car.'''
|-
| style="height:20px; width:300px; text-align:left;" |
final speed = 8[[m/s]]
 
initial speed = 0[[m/s]]
 
time = 0.8[[s]]
 
<math>a = {\tfrac{v-u}{t}} </math>
 
<math>a = {\tfrac{8-0}{0.8}} </math>
 
<math>a = {\tfrac{8}{0.8}} </math>
 
<math>a = 10m/s/s </math>
 
| style="height:20px; width:300px; text-align:left;" |
final speed = 80[[m/s]]
 
initial speed = 20[[m/s]]
 
time = 1.5[[s]]
 
<math>a = {\tfrac{v-u}{t}} </math>
 
<math>a = {\tfrac{80-20}{1.5}} </math>
 
<math>a = {\tfrac{60}{1.5}} </math>
 
<math>a = 40m/s/s </math>
|-
| style="height:20px; width:300px; text-align:center;" |'''A [[horse]] begins trotting at 3.0m/s and accelerates to canter at 11m/s in 2.0 seconds. Calculate the acceleration of the [[horse]].
| style="height:20px; width:300px; text-align:center;" |'''A space probe is travelling at 18,000m/s and uses a thruster for 250 seconds to slow down to 6,000m/s. Calculate the acceleration of the space probe.'''
|-
| style="height:20px; width:300px; text-align:left;" |
final speed = 11[[m/s]]
 
initial speed = 3.0[[m/s]]
 
time = 2.0[[s]]
 
<math>a = {\tfrac{v-u}{t}} </math>
 
<math>a = {\tfrac{11-3.0}{2.0}} </math>
 
<math>a = {\tfrac{8.0}{2.0}} </math>
 
<math>a = 4m/s/s </math>
| style="height:20px; width:300px; text-align:left;" |
final speed = 18,000[[m/s]]
 
initial speed = 6,000[[m/s]]
 
time = 250[[s]]
 
<math>a = {\tfrac{v-u}{t}} </math>
 
<math>a = {\tfrac{18,000-6,000}{250}} </math>
 
<math>a = {\tfrac{12,000}{250}} </math>
 
<math>a = 48m/s/s </math>
|}