A 5kg block is being pulled on a horizontal frictionless surface. The tension in the string is 30N. If the block has an initial speed of 2m/s, what is the speed after moving 10 meters?

Question

Please help!Thanks

Answer 1

F=ma, so
a = 30/5 = 6 m/s^2
s = 2 + 3t^2 = 10
so, t = √(8/3) ≈ 1.633 s

v = at = 6*.1633 = 9.80 m/s