5B.2 Centripetal Force

Question 1

when something is in a circular motion and is released it goes off

Answer 1

in a straight line (tangent to the circle)

Question 2

what is the centripetal froce

Answer 2

the resultant force toward the middle of the circle to maintain the object’s circular motion

Question 3

what is the proof of centripetal force

Answer 3

as the object is going in a circle it has an angular velocity, the object might have constant speed velocity but its constantly changing directions and therefore always accelerating, newtons first law tells us that acceleration will only happen if there is a resultant force present and the object is constantly being pulled toward the circle proving the centripetal force

Question 4

what is the equation for the centripetal force

Answer 4

F = mv^2/r

Question 5

the centripetal force will be larger if

Answer 5

• the rotating object has more mass
  -the object rotates faster
  -the object is closer to the centre of the circle

Question 6

plotting w^2 = f/mr with w x f gives us a

Answer 6

a straight line with the m of 1/mr

Question 7

how can you test centripetal force

Answer 7

with attaching a rope to a bung and swinging it around your head, using a paper clip and an empty pen body to keep a constant length, (10 revolutions with time recorded) and weight at the bottom of the rope to give it tension (centripetal force