Question

a ball is thrown upwards with a speed of 20 m/s...what will be its speed after 2 secs??

please tell the answer in detail​

Answer 1

Answer:

given u = 20m/sec, g = -10m/sec² , t = 2secs,v = ?

formula used v²-u²=2gs

v² - 20² = 2×(-10)×2

v² - 400 = - 40

v² = -40 + 400

v² = 360

v = √360

=> √36×10

=> 6√10 m/sec