Problem P. 4371. (October 2011)
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 November 10, 2011.
Sorry, the solution is available only in Hungarian. Google translation
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.
388 students sent a solution. 3 points: 301 students. 2 points: 44 students. 1 point: 25 students. 0 point: 11 students. Unfair, not evaluated: 7 solutions.