# Answer to Question #60600 in Other Physics for jazy

Question #60600

A stone is thrown vertically upwards. It takes about 3 seconds to reach its maximum The initial speed of the object was about:

Expert's answer

At the highest point the vertical speed is zero. Therefore,

Vi - gt = 0;

Vi - 9.8x3 = 0;

Vi = 9.8x3 = 29.4 m/s

Vi - gt = 0;

Vi - 9.8x3 = 0;

Vi = 9.8x3 = 29.4 m/s

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## Comments

Assignment Expert29.06.16, 17:07Dear Jazy, please use panel for submitting new questions

Jazy29.06.16, 00:50Two cars traveling in opposite directions pass each other at 1:00 p.m. One of the cars travels at a speed of 90 km/h, while the other travels at a speed of 72 km/h. How far apart will they be at 2:00 p.m.?

A) 162 km B) 108 km C) 144 km D) 180 km

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