Answer:
1.20m/s
Explanation:
We can use the formula [ m = w/g ] and [ t - w = mv^2/r ] to solve.
Use the first formula.
m = 10/9.8
m = 1.02
Use the second formula.
12 - 10 = 1.02-v^2/0.72
2 = 1.02-v^2/0.72
1.04v^2 = 1.47
v^2 = 1.41
v = √1.41
v ≈ 1.20
Best of Luck!