Question

Try to give atleast 2ans properly....

Answer 1

23.
We have,
u=18km/h = 5m/s
v=36km/h = 10m/s
t=5 sec

acceleration (a) = 10-5/5 = 1m/s²

distance (s) = s=ut+1/2at²
s= (5*5) = 1/2*1*5*5
s= 25+12.5
s= 37.5 m

25.
v=0m/s
u=5m/s
a=-10m/s²

v²-u²=2as
s=v²-u²/2a
s=0²-5²/2*-10
s=-25/-20
s=1.25 m

26.
u=0m/s
a=3m/s
t=8sec

s=ut+1/2at²
s=(0*8)+1/2*3*8*8
s=1/2*8*8*3
s=96m.


Hope it helps.
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