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Step-by-step explanation:
( a) t=2 sec
(displacement) s= ut+1/2 at^2
=> s= 0×2+ 1/2× 2×(2)^2
s= 4 m
Velocity = displacement / time
=> 4/ 2= 2 m/sec
(b) velocity= 10m/sec
v=u+at
10= 0+2×t
t=5sec
displacement= velocity × time
=> 10×5 => 50m
time = 10 min
s= ut+ 1/2at^2
s=> 0×10+ 1/2×2×(10)^2
s=> 100m
velocity = displacement/time
=> 100/10
=> 10 m /min
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