Answer:
18 m/s
Explanation:
1.8 meters / 0.1 seconds = 18 m/s
.
/
4n
2.9 A
L = 16 cm = 0.16 m
B = 0.19 T
m = 9 g = 0.009 kg
Let the minimum current be i.
Magnetic force is balanced by the gravitational force
B x i x L = m x g
0.19 x i x 0.16 = 0.009 x 9.8
i = 2.9 A
