An 8.00-kg box sits on a level floor. You give the box a sharp push and find tha

Question

An 8.00-kg box sits on a level floor. You give the box a sharp push and find that it travels 8.22 m in 2.8 s before coming to rest again.

You add books to the box to increase its mass. Repeating the experiment, you give the box a push and measure how long it takes the box to come to rest and how far the box travels. The results, including the initial experiment with no added mass, are given in (Figure 1) . In each case, did your push give the box the same initial speed?

1) Yes, in each case initial speed is the same and equals 6.3 m/s.

2) Yes, in each case initial speed is the same and equals 6.7 m/s.

3) Yes, in each case initial speed is the same and equals 5.9 m/s.

4) No, in each case initial speed is not the same.

Explanation / Answer

No, in each case initial speed is not the same.

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