Physics

Problem

The engine of a motorcycle delivers a power that is proportional to its instantaneous speed:

P=100\,v

, where

P

is in watts and

v

\text{m s}^{-1}

. If the mass of the motorcycle and rider together is

200\,\text{kg}

, the acceleration of the motorcycle at the instant it is moving at

20\,\text{m s}^{-1}

is a)

1.0\,\text{m s}^{-2}

0.25\,\text{m s}^{-2}

0.50\,\text{m s}^{-2}

2.5\,\text{m s}^{-2}