1. A 35-kg cart (#1) is pulled with a 199-N force for 11 second; another 75 kg cart (#2) is pulled with a 19 N-force for 15 seconds. Which cart (#1 or #2) has the greatest acceleration? Explain.
2.Which cart (#1 or #2) has the greatest impulse? Explain.
3. Which cart (#1 or #2) has the greatest change in momentum? Explain.
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Remember F = ma, so a=F/m. Cart 1 has acceleration = F/m = 199/35 = 5.686m/s² Cart 2 has acceleration = F/m = 19/75 = 0.253m/s² So cart 1 has the bigger acceleration. The time is not used. ___________________________________ If you want to work out the final velocities (which is *not* part of the question): v = at = (F/m)t, so your formula is correct, Cart 1's velocity after 11s = 5.686 x 11 = 62.5m/s Cart 2's velocity after 15s = 0.253 x 15 = 3.8m/s Don't foget to include units with your values or you lose marks.
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