a particle is dropped from the tower is 180 m high.how long does it take to reach the ground?what is the velocity when it touches the ground.
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180 = 1/2×10×t2 using s = ut + 1/2gt2
180= 5t2
t2= 180/5
t2= 36
t = 6 secs
v = u+ gt
v = 10×6
= 60m/s
180= 5t2
t2= 180/5
t2= 36
t = 6 secs
v = u+ gt
v = 10×6
= 60m/s
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