Question

A motor car is moving on a circular path of radius 500 meter and has a speed 30 $m{s}^{-1}$ at a particular instant. Its speed is increasing at the rate of 2 $m{s}^{-2}$. What is its acceleration at this instant?

• A. 2.5 $m{s}^{-2}$
• B. 2.7 $m{s}^{-2}$
• C. 2 $m{s}^{-2}$
• D. 4.5 $m{s}^{-2}$

Answer 1

The correct option is C 2 $m{s}^{-2}$

• Since the speed of the car is increasing by $2m/s^2$,its acceleration is also $2m/s^2$.
  
• Since acceleration is rate of change of speed with time.