When you throw a stone horizontally from the top of a cliff at 10 m/s, one second after leaving your hand its vertical distance below the top of the cliff is
1) 5 m.
2) 10 m.
3) 15 m.
And its speed at that instant is
4) 10 m/s.
5) about 14 m/s.
6) 15 m/s.
7) greater than 15 m/s.
Answer: 1, 5
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