Showdown at Shalour City Gym part-2 (Its you this time too!)
Little Pikachu who weighs merely a
and has a height of
, is doing really a good job against Mega Lucario (who is really big in comparison to Pikachu). After giving a strong thunder bolt which hit Mega Lucario, Pikachu is standing in front of you (at rest) and waiting for you next order. You order Pikachu to do tackle. Pikachu dashes off. His final velocity on reaching Mega Lucario,(who was first at a distance of
from Pikachu), was
.How much time did it take Pikachu to reach Mega Lucario? Find the force Pikachu applied on Mega Lucario.
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First of all initial velocity is 0m/s and final velocity is 10m/s and the distance is 10m. So, using v^2-u^2 = 2as,
100=20 x a.
Hence, a = 5m/s^2.
Then, force = ma = 0.5 x 5 = 2.5N.
To find time let us use the equation, v=u+at.
Then, 10 = 0+5t. then , t = 2 seconds.
Nice question. Please keep on posting such questions.