Question

1) If a nucleus were as big as a grape, an atom would be as big as a :

a house

a football field

a city

the moon

Answer 1

A body of mass 98Kg is moving in a vertical circle of radius 1m.The minimum possible speed at the highest point of the circle is:

1m/s

4m/s

10m/s

6m/s

Answer 2

An atom would be a football field

Answer 3

\[a=v^2/r\]and the acceleration according to what I understood from you is g and at the highest point it has the cos of 90 degrees so it would be one,
so 10=v^2/1
then v would equal Sqrt[10] m/sec

Answer 4

Football field. This is a common question.