Question

A car accelerates from rest to 100 m/s in 20 s. What is its acceleration?

Answer 1

`initial \: velocity \: = 0 \\ final \: velocity \: 100 (m)/(s) \\ time = 20 \\ here \: we \: want \: to \: find \: accelaration \\ accelaration \: = (final \: velocity - initial \: velocity)/(time) \\ accelaration \: = (100 - 0)/(20) = (100)/(20) = 5 \frac{m}{ {s}^(2) } \\ thank \: you`

Answer 2

• initial velocity=0m/s=u
• Final velocity=v=100m/s
• Time=t=20s

`\\ \sf\longmapsto Acceleration=(v-u)/(t)`

`\\ \sf\longmapsto Acceleration=(100-0)/(20)`

`\\ \sf\longmapsto Acceleration=(100)/(20)`

`\\ \sf\longmapsto Acceleration=5m/s^2`