I need help please. I give you brain list. 1. In the context of Cold War America, would “Bert the Turtle” frighten or reassure schoolchildren?
2. Why are the contributions of local grassroots workers so often overlooked, in studies of the civil rights movement as well as in accounts of other great events in American history?

safe speed for the larger radius track u= √2 v

Explanation:

The sum of the forces on either side is the same, the only difference is the radius of curvature and speed.

Also given that r_1= smaller radius

r_2= larger radius curve

r_2= 2r_1i

let u be the speed of larger radius curve

now, \sum F = \frac{mv^2}{r_1} =\frac{mu^2}{r_2}∑F=

r

1

mv

2

=

r

2

mu

2

ii

form i and ii we can write

v^2= \frac{1}{2} u^2v

2

=

2

1

u

2

⇒u= √2 v

therefore, safe speed for the larger radius track u= √2 v

People say that Odysseus died of Old Age, as Tiresias predicted.

Explanation:

He was 18 when Odysseus married Penelope. He was in his 24 when

he left for the Trojan War. It took him 20 years to get back home,

and he lived for another 10 years before his youngest son,

Telegonus, son of Circe, kills Odysseus without knowing who his

father was. So in total, Odysseus was 54 years old.