Answers

2014-09-28T21:40:30+05:30
Mass= 4Kg
Height=10m(let it be 's')
u (initial velocity)= 0m/s
acceleration due to gravity = 9.8m/s^2
According to laws of motion,
v^2-u^2= 2as
=> (v)^2- 0= 2*(9.8)*(10)
=(v)^2=2x98 {9.8x10=98}
v^2= 196
=>v = sqrt of 196 = 14m/s
Final velocity = 14m/s
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There r 4 option
34.27m/sec,40.27m/sec,44.27 m/sec ,50.27m/sec
sorry? i didn't get you... ):p
There are 4 options.
2014-09-28T22:57:56+05:30
according to Newton's third equation
v²-u²=2aS
v²-0=2*9.8*10
v²=196
v=14m/s
so the final velocity was 14 m/s
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