a steam engine of mass 3 x 10^4 kg pulls two wagons each of mass 2 x 10^4 with an acceleration of 0.2 m/s^2. calculate the (i) force exerted by the engine (ii) force experienced by each wagon.

(i)Force=Total mass×acceleration         =3×104+2×2×104×0.2         =14000 N(ii)Force experienced by the first wagon after the engine:F1=2ma    = 2×2×104×0.2     =8000 NForce experienced by the second wagon after the engine:F2=ma    =2×104×0.2    =4000 N       

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