Question

Answer the question​

Answer 1

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Answer 2

Height = 20

Acceleration= 10ms^-2( rate of change of velociy is called acceleration)

2as = v^2-u^2

2×10×20 =. v^2 - 0^2

400 = V^2

√400= V

20 = V

V= u+at

20 = 0+10t

20/10= t

2sec = t