P. 4371. A pebble shot by a slingshot has an initial vertical, upward speed of 50 m/s. If there was no air drag
a) where would the pebble be after 7 seconds;
b) What would its speed be at that moment;
c) How much distance would it cover in 7 seconds?
Deadline expired on 10 November 2011.
Google Translation (Sorry, the solution is published in Hungarian only.)
Megoldás. \(\displaystyle a)\) 109,3 m magasan lenne;
\(\displaystyle b)\) 18,7 m/s sebességgel esne lefelé.
\(\displaystyle c)\) Kb. 127 métert emelkedne és 18 métert esne a kavics, tehát összesen 145 m utat tenne meg 7 s alatt.