On a straight frictionless track

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

On a straight frictionless track, three horizontal forces act on a small trolley moving along the track:

1200\,\text{dyn}

towards the right,

0.60\,\text{N}

towards the right and

0.20\,\text{N}

towards the left. The trolley gains an acceleration of

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

in the direction of the resultant force. Answer the following. (i) Convert

1200\,\text{dyn}

into newtons. (ii) Calculate the magnitude of the resultant horizontal force acting on the trolley. (iii) Determine the mass of the trolley.