Posted by srikar on Saturday, May 19, 2012 at 2:23am.
Someone will gladly critique your thinking, when any is shown.
1.
s =vₒ•t +a•t²/2,
v(9) = vₒ +a•9,
24 =v(9) •1 + a•1²/2 =
=vₒ +a•9 + a•1²/2 =
= vₒ +9.5•a.
s =vₒ•t +a•t²/2 =>
150 = vₒ•10+ a•100/2 =
= 10• vₒ + 50•a.
24= vₒ +9.5•a,
150= 10• vₒ + 50•a.
45° = 90,
a = 2 m/s².
vₒ = 24-9.5 •a = 5 m/s.
2.
Average speed = total distance travelled/ total time taken = 1.5•126/50 = 3.78 m/s,
Displacement is the distance from the starting point to the end point.
Average velocity = final displacement/total time taken = D/t = =40/50 =0.8 m/s.
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