The FIRST statement on the list is the definition of momentum, so that's the one that must be true.
Hi,
Recall the formula V=d/t, where V stands for velocity or speed, d stands for distance and t stands for time. By substituting your values you get: V=50.0km/2.5h, which equals to 20km/h.
<span> 146 kg is the answer to your question hope this helps bro
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To measure acceleration, a stopwatch is used.