Question

A cheetah starts from rest and accelerates with $2\frac{m}{s^2}$ for 10 seconds. What is its velocity after 10 seconds?

• A. $200\frac{m}{s}$
• B. $20\frac{m}{s}$
• C. $2\frac{m}{s}$
• D. $0.2\frac{m}{s}$

Answer 1

The correct option is B

$20\frac{m}{s}$

Given initially, the cheetah is at rest.

So, u = 0

Also, Acceleration, a =$2\frac{m}{s^2}$ and time, t = 10 seconds

We know,

Final velocity v = u + at

$\Rightarrow$ v = 0 + (2 $\times$ 10)

$\Rightarrow$v = $20\frac{m}{s}$