1.

Calculate the acceleration of the bicycle of mass 25 kg as shown in Figures 1 and 2.

Answer»

Given:

Mass of bicycle m = 25 kg

Fig. I:

Net force acting in the forward direction, F = 500 – 400 = 100 N 

acceleration a = \(\frac{F}{m}\) = \(\frac{100}{25}\) = 4ms-2

Fig. II:

Net force acting on bicycle F = 400 – 400 = 0 

∴ acceleration a = \(\frac{F}{m}\)\(\frac{0}{25}\) = 0



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