Which would require a greater force - accelerating a 10 gram mass at 5 m/s^2 or a 20 gram mass at 2 m/s^2?
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Which would require a greater force - accelerating a 10 gram mass at 5 m/s2 or a 20 gram mass at 2 m/s2?

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Solution :

(i) In first case -

 Force, F = m × a    

    = 10/100 kg × 5 m/s2

    = 0.05 N

(ii) In Second case -

Force, F = 20/1000 kg × 2 m/s2

        .      = 0.04 N

Thus, a greater force of 0.05 newton is required for accelerating a  10 g mass 

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