Physics

Problem

A particle of mass

1.5\,\text{kg}

moves along a straight line such that its velocity at time

t

v = 2t^{3} - 3t\,\text{m s}^{-1}

(with

t

in seconds). What is the magnitude of the force acting on the particle at

t = 2\,\text{s}

? a)

42.0\,\text{N}

31.5\,\text{N}

21.0\,\text{N}

40.5\,\text{N}