Question

a particle is dropped from top of a tower .it covers 40 m in last 2 second.find height of tower
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Answer 1

Answer:

80 m

Explanation:

in 1sec traveling 20m

v^2-u^2=1/2as

v=20m/s, u = 0m/s and a= 10m/s^2

(20m/s)^2-0= 1/2 * 10m/s^2* s

s=80m