Question

A car initially at rest starts moving with a constant acceleration of $0.5m{s}^{-2}$ and travels a distance of 25 m. Find its final velocity.

• A. $2.5m{s}^{-1}$
• B. $10m{s}^{-1}$
• C. $5m{s}^{-1}$
• D. $0m{s}^{-1}$

Answer 1

The correct option is C $5m{s}^{-1}$

From equation of motion $v^2=u^2+2aS$
$v^2=(0{)}^2+2\times 0.5\times 25$
or $v^2=25$
or Final velocity $v=\sqrt{25}=5m{s}^{-1}$